{"id":165,"date":"2025-10-31T00:25:51","date_gmt":"2025-10-31T00:25:51","guid":{"rendered":"https:\/\/vibromera.eu\/glossary\/mode-shape\/"},"modified":"2026-05-23T23:04:15","modified_gmt":"2026-05-23T23:04:15","slug":"mode-shape","status":"publish","type":"glossary","link":"https:\/\/vibromera.eu\/pt\/glossary\/mode-shape\/","title":{"rendered":"O que \u00e9 o modo de vibra\u00e7\u00e3o em din\u00e2mica de rotores?"},"content":{"rendered":"<h1>Compreender os modos de vibra\u00e7\u00e3o na din\u00e2mica de rotores<\/h1>\n\t\t<section class=\"woocommerce hestia-shop products is-shortcode\" id=\"products\" data-sorder=\"hestia_shop\" >\n\t\t\t\t\t\t<div class=\"\">\n\t\t\t\t\t\t<div class=\"hestia-shop-content\">\n\t\t\t<div class=\"row\" data-aos=\"fade-up\" >\t\t\t\t\t<div class=\"col-ms-6 col-sm-6 col-md-3 shop-item\">\n\t\t\t\t\t\t<a href=\"https:\/\/vibromera.eu\/pt\/product\/balanset-1\/\" class=\"woocommerce-LoopProduct-link woocommerce-loop-product__link\">\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<div class=\"card-image\">\n\t\t\t\t\t\t\t\t\t<a href=\"https:\/\/vibromera.eu\/pt\/product\/balanset-1\/\" title=\"Equilibrador port\u00e1til e analisador de vibra\u00e7\u00f5es Balanset-1A\">\n\t\t\t\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"230\" height=\"153\" src=\"https:\/\/vibromera.eu\/wp-content\/uploads\/2023\/09\/77-e1693745667801-230x153.webp\" class=\"attachment-woocommerce_thumbnail size-woocommerce_thumbnail\" alt=\"Balanset-1A kit completo de balanceador port\u00e1til e analisador de vibra\u00e7\u00f5es\" srcset=\"https:\/\/vibromera.eu\/wp-content\/uploads\/2023\/09\/77-e1693745667801-230x153.webp 230w, https:\/\/vibromera.eu\/wp-content\/uploads\/2023\/09\/77-e1693745667801-18x12.webp 18w, https:\/\/vibromera.eu\/wp-content\/uploads\/2023\/09\/77-e1693745667801-360x240.webp 360w, https:\/\/vibromera.eu\/wp-content\/uploads\/2023\/09\/77-e1693745667801-272x182.webp 272w\" sizes=\"auto, (max-width: 230px) 100vw, 230px\" \/>\t\t\t\t\t\t\t\t\t<\/a>\n\t\t\t\t\t\t\t\t\t<div class=\"ripple-container\"><\/div>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<div class=\"content\">\n\t\t\t\t\t\t\t\t<span class=\"category\"><a href=\"https:\/\/vibromera.eu\/pt\/product-category\/devices\/\" rel=\"tag\">Dispositivos<\/a><\/span>\n\t\t\t\t\t\t\t\t<h4 class=\"card-title\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<a class=\"shop-item-title-link\" href=\"https:\/\/vibromera.eu\/pt\/product\/balanset-1\/\" title=\"Equilibrador port\u00e1til e analisador de vibra\u00e7\u00f5es Balanset-1A\">Equilibrador port\u00e1til e analisador de vibra\u00e7\u00f5es Balanset-1A<\/a>\n\n\t\t\t\t\t\t\t\t<\/h4>\n\n\t\t\t\t\t\t\t\t\n\t\t\t\t\t\t\t\t<div class=\"footer\">\n\n\t\t\t\t\t\t\t\t\t<div class=\"price\"><h4><span class=\"woocommerce-Price-amount amount\"><span class=\"woocommerce-Price-currencySymbol\">\u20ac<\/span>1,975.00<\/span> + IVA (se aplic\u00e1vel)<\/h4><\/div>\n\t\t\t\t\t\t\t\t\t<div class=\"stats\">\n\t\t\t\t\t\t\t\t\t\t<a rel=\"nofollow\" href=\"\/pt\/wp-json\/wp\/v2\/glossary\/165?add-to-cart=986\" data-quantity=\"1\" data-product_id=\"986\" data-product_sku=\"BS-1\" class=\"button product_type_simple add_to_cart_button ajax_add_to_cart btn btn-just-icon btn-simple btn-default\" title=\"Adicionar\" data-no-translation-title=\"\"><i rel=\"tooltip\" data-original-title=\"Adicionar\" class=\"fas fa-cart-plus\" data-no-translation-data-original-title=\"\"><\/i><\/a>\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/a><a href=\"\/pt\/wp-json\/wp\/v2\/glossary\/165?add-to-cart=986\" aria-describedby=\"woocommerce_loop_add_to_cart_link_describedby_986\" data-quantity=\"1\" class=\"button product_type_simple add_to_cart_button ajax_add_to_cart\" data-product_id=\"986\" data-product_sku=\"BS-1\" aria-label=\"Adiciona ao carrinho: \u201cPortable balancer &amp; Vibration analyzer Balanset-1A\u201d\" rel=\"nofollow\" data-success_message=\"\u201cPortable balancer &amp; Vibration analyzer Balanset-1A\u201d foi adicionado ao seu carrinho\" data-no-translation=\"\" data-trp-gettext=\"\" data-no-translation-aria-label=\"\" data-no-translation-data-success_message=\"\">Adicionar<\/a>\t<span id=\"woocommerce_loop_add_to_cart_link_describedby_986\" class=\"screen-reader-text\">\n\t\t\t<\/span>\n\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\t\t<div class=\"col-ms-6 col-sm-6 col-md-3 shop-item\">\n\t\t\t\t\t\t<a href=\"https:\/\/vibromera.eu\/pt\/product\/vibration-sensor\/\" class=\"woocommerce-LoopProduct-link woocommerce-loop-product__link\">\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<div class=\"card-image\">\n\t\t\t\t\t\t\t\t\t<a href=\"https:\/\/vibromera.eu\/pt\/product\/vibration-sensor\/\" title=\"Sensor de vibra\u00e7\u00e3o\">\n\t\t\t\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"230\" height=\"153\" src=\"https:\/\/vibromera.eu\/wp-content\/uploads\/2018\/05\/IMG-3-230x153.webp\" class=\"attachment-woocommerce_thumbnail size-woocommerce_thumbnail\" alt=\"Grande plano do sensor de vibra\u00e7\u00e3o Balanset-1A\" srcset=\"https:\/\/vibromera.eu\/wp-content\/uploads\/2018\/05\/IMG-3-230x153.webp 230w, https:\/\/vibromera.eu\/wp-content\/uploads\/2018\/05\/IMG-3-600x400.webp 600w, https:\/\/vibromera.eu\/wp-content\/uploads\/2018\/05\/IMG-3-300x200.webp 300w, https:\/\/vibromera.eu\/wp-content\/uploads\/2018\/05\/IMG-3-768x512.webp 768w, https:\/\/vibromera.eu\/wp-content\/uploads\/2018\/05\/IMG-3-1024x682.webp 1024w, https:\/\/vibromera.eu\/wp-content\/uploads\/2018\/05\/IMG-3-272x182.webp 272w, https:\/\/vibromera.eu\/wp-content\/uploads\/2018\/05\/IMG-3.webp 1280w\" sizes=\"auto, (max-width: 230px) 100vw, 230px\" \/>\t\t\t\t\t\t\t\t\t<\/a>\n\t\t\t\t\t\t\t\t\t<div class=\"ripple-container\"><\/div>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<div class=\"content\">\n\t\t\t\t\t\t\t\t<span class=\"category\"><a href=\"https:\/\/vibromera.eu\/pt\/product-category\/parts\/\" rel=\"tag\">Pe\u00e7as<\/a><\/span>\n\t\t\t\t\t\t\t\t<h4 class=\"card-title\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<a class=\"shop-item-title-link\" href=\"https:\/\/vibromera.eu\/pt\/product\/vibration-sensor\/\" title=\"Sensor de vibra\u00e7\u00e3o\">Sensor de vibra\u00e7\u00e3o<\/a>\n\n\t\t\t\t\t\t\t\t<\/h4>\n\n\t\t\t\t\t\t\t\t\n\t\t\t\t\t\t\t\t<div class=\"footer\">\n\n\t\t\t\t\t\t\t\t\t<div class=\"price\"><h4><span class=\"woocommerce-Price-amount amount\"><span class=\"woocommerce-Price-currencySymbol\">\u20ac<\/span>90.00<\/span> + IVA (se aplic\u00e1vel)<\/h4><\/div>\n\t\t\t\t\t\t\t\t\t<div class=\"stats\">\n\t\t\t\t\t\t\t\t\t\t<a rel=\"nofollow\" href=\"\/pt\/wp-json\/wp\/v2\/glossary\/165?add-to-cart=1820\" data-quantity=\"1\" data-product_id=\"1820\" data-product_sku=\"VS-1\" class=\"button product_type_simple add_to_cart_button ajax_add_to_cart btn btn-just-icon btn-simple btn-default\" title=\"Adicionar\" data-no-translation-title=\"\"><i rel=\"tooltip\" data-original-title=\"Adicionar\" class=\"fas fa-cart-plus\" data-no-translation-data-original-title=\"\"><\/i><\/a>\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/a><a href=\"\/pt\/wp-json\/wp\/v2\/glossary\/165?add-to-cart=1820\" aria-describedby=\"woocommerce_loop_add_to_cart_link_describedby_1820\" data-quantity=\"1\" class=\"button product_type_simple add_to_cart_button ajax_add_to_cart\" data-product_id=\"1820\" data-product_sku=\"VS-1\" aria-label=\"Adiciona ao carrinho: \u201cVibration sensor\u201d\" rel=\"nofollow\" data-success_message=\"\u201cVibration sensor\u201d foi adicionado ao seu carrinho\" data-no-translation=\"\" data-trp-gettext=\"\" data-no-translation-aria-label=\"\" data-no-translation-data-success_message=\"\">Adicionar<\/a>\t<span id=\"woocommerce_loop_add_to_cart_link_describedby_1820\" class=\"screen-reader-text\">\n\t\t\t<\/span>\n\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\t\t<div class=\"col-ms-6 col-sm-6 col-md-3 shop-item\">\n\t\t\t\t\t\t<a href=\"https:\/\/vibromera.eu\/pt\/product\/optical-sensor-for-balanset-and-arbalance\/\" class=\"woocommerce-LoopProduct-link woocommerce-loop-product__link\">\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<div class=\"card-image\">\n\t\t\t\t\t\t\t\t\t<a href=\"https:\/\/vibromera.eu\/pt\/product\/optical-sensor-for-balanset-and-arbalance\/\" title=\"Sensor \u00f3tico (tac\u00f3metro laser)\">\n\t\t\t\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"230\" height=\"153\" src=\"https:\/\/vibromera.eu\/wp-content\/uploads\/2022\/12\/ZKqzGXSCCBU-230x153.webp\" class=\"attachment-woocommerce_thumbnail size-woocommerce_thumbnail\" alt=\"Sensor \u00f3tico (tac\u00f3metro laser)\" srcset=\"https:\/\/vibromera.eu\/wp-content\/uploads\/2022\/12\/ZKqzGXSCCBU-230x153.webp 230w, https:\/\/vibromera.eu\/wp-content\/uploads\/2022\/12\/ZKqzGXSCCBU-300x200.webp 300w, https:\/\/vibromera.eu\/wp-content\/uploads\/2022\/12\/ZKqzGXSCCBU-1024x682.webp 1024w, https:\/\/vibromera.eu\/wp-content\/uploads\/2022\/12\/ZKqzGXSCCBU-768x512.webp 768w, https:\/\/vibromera.eu\/wp-content\/uploads\/2022\/12\/ZKqzGXSCCBU-1536x1023.webp 1536w, https:\/\/vibromera.eu\/wp-content\/uploads\/2022\/12\/ZKqzGXSCCBU-18x12.webp 18w, https:\/\/vibromera.eu\/wp-content\/uploads\/2022\/12\/ZKqzGXSCCBU-360x240.webp 360w, https:\/\/vibromera.eu\/wp-content\/uploads\/2022\/12\/ZKqzGXSCCBU-460x306.webp 460w, https:\/\/vibromera.eu\/wp-content\/uploads\/2022\/12\/ZKqzGXSCCBU-600x400.webp 600w, https:\/\/vibromera.eu\/wp-content\/uploads\/2022\/12\/ZKqzGXSCCBU-272x182.webp 272w, https:\/\/vibromera.eu\/wp-content\/uploads\/2022\/12\/ZKqzGXSCCBU.webp 1600w\" sizes=\"auto, (max-width: 230px) 100vw, 230px\" \/>\t\t\t\t\t\t\t\t\t<\/a>\n\t\t\t\t\t\t\t\t\t<div class=\"ripple-container\"><\/div>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<div class=\"content\">\n\t\t\t\t\t\t\t\t<span class=\"category\"><a href=\"https:\/\/vibromera.eu\/pt\/product-category\/parts\/\" rel=\"tag\">Pe\u00e7as<\/a><\/span>\n\t\t\t\t\t\t\t\t<h4 class=\"card-title\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<a class=\"shop-item-title-link\" href=\"https:\/\/vibromera.eu\/pt\/product\/optical-sensor-for-balanset-and-arbalance\/\" title=\"Sensor \u00f3tico (tac\u00f3metro laser)\">Sensor \u00f3tico (tac\u00f3metro laser)<\/a>\n\n\t\t\t\t\t\t\t\t<\/h4>\n\n\t\t\t\t\t\t\t\t\n\t\t\t\t\t\t\t\t<div class=\"footer\">\n\n\t\t\t\t\t\t\t\t\t<div class=\"price\"><h4><span class=\"woocommerce-Price-amount amount\"><span class=\"woocommerce-Price-currencySymbol\">\u20ac<\/span>124.00<\/span> + IVA (se aplic\u00e1vel)<\/h4><\/div>\n\t\t\t\t\t\t\t\t\t<div class=\"stats\">\n\t\t\t\t\t\t\t\t\t\t<a rel=\"nofollow\" href=\"\/pt\/wp-json\/wp\/v2\/glossary\/165?add-to-cart=1832\" data-quantity=\"1\" data-product_id=\"1832\" data-product_sku=\"Tach-1\" class=\"button product_type_simple add_to_cart_button ajax_add_to_cart btn btn-just-icon btn-simple btn-default\" title=\"Adicionar\" data-no-translation-title=\"\"><i rel=\"tooltip\" data-original-title=\"Adicionar\" class=\"fas fa-cart-plus\" data-no-translation-data-original-title=\"\"><\/i><\/a>\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/a><a href=\"\/pt\/wp-json\/wp\/v2\/glossary\/165?add-to-cart=1832\" aria-describedby=\"woocommerce_loop_add_to_cart_link_describedby_1832\" data-quantity=\"1\" class=\"button product_type_simple add_to_cart_button ajax_add_to_cart\" data-product_id=\"1832\" data-product_sku=\"Tach-1\" aria-label=\"Adiciona ao carrinho: \u201cOptical Sensor (Laser Tachometer)\u201d\" rel=\"nofollow\" data-success_message=\"\u201cOptical Sensor (Laser Tachometer)\u201d foi adicionado ao seu carrinho\" data-no-translation=\"\" data-trp-gettext=\"\" data-no-translation-aria-label=\"\" data-no-translation-data-success_message=\"\">Adicionar<\/a>\t<span id=\"woocommerce_loop_add_to_cart_link_describedby_1832\" class=\"screen-reader-text\">\n\t\t\t<\/span>\n\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\t\t<div class=\"col-ms-6 col-sm-6 col-md-3 shop-item\">\n\t\t\t\t\t\t<a href=\"https:\/\/vibromera.eu\/pt\/product\/balanset-4\/\" class=\"woocommerce-LoopProduct-link woocommerce-loop-product__link\">\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<div class=\"card-image\">\n\t\t\t\t\t\t\t\t\t<a href=\"https:\/\/vibromera.eu\/pt\/product\/balanset-4\/\" title=\"Balanset-4\">\n\t\t\t\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"230\" height=\"153\" src=\"https:\/\/vibromera.eu\/wp-content\/uploads\/2022\/12\/balkom4-230x153.webp\" class=\"attachment-woocommerce_thumbnail size-woocommerce_thumbnail\" alt=\"Kit de balanceamento de rotor Vibromera: estojo de transporte, condicionador de sinal multicanal, analisador port\u00e1til, base magn\u00e9tica, sensores de vibra\u00e7\u00e3o e cabos espiralados.\" srcset=\"https:\/\/vibromera.eu\/wp-content\/uploads\/2022\/12\/balkom4-230x153.webp 230w, https:\/\/vibromera.eu\/wp-content\/uploads\/2022\/12\/balkom4-300x200.webp 300w, https:\/\/vibromera.eu\/wp-content\/uploads\/2022\/12\/balkom4-18x12.webp 18w, https:\/\/vibromera.eu\/wp-content\/uploads\/2022\/12\/balkom4-360x240.webp 360w, https:\/\/vibromera.eu\/wp-content\/uploads\/2022\/12\/balkom4-460x306.webp 460w, https:\/\/vibromera.eu\/wp-content\/uploads\/2022\/12\/balkom4-600x400.webp 600w, https:\/\/vibromera.eu\/wp-content\/uploads\/2022\/12\/balkom4-272x182.webp 272w, https:\/\/vibromera.eu\/wp-content\/uploads\/2022\/12\/balkom4.webp 640w\" sizes=\"auto, (max-width: 230px) 100vw, 230px\" \/>\t\t\t\t\t\t\t\t\t<\/a>\n\t\t\t\t\t\t\t\t\t<div class=\"ripple-container\"><\/div>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<div class=\"content\">\n\t\t\t\t\t\t\t\t<span class=\"category\"><a href=\"https:\/\/vibromera.eu\/pt\/product-category\/devices\/\" rel=\"tag\">Dispositivos<\/a><\/span>\n\t\t\t\t\t\t\t\t<h4 class=\"card-title\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<a class=\"shop-item-title-link\" href=\"https:\/\/vibromera.eu\/pt\/product\/balanset-4\/\" title=\"Balanset-4\">Balanset-4<\/a>\n\n\t\t\t\t\t\t\t\t<\/h4>\n\n\t\t\t\t\t\t\t\t\n\t\t\t\t\t\t\t\t<div class=\"footer\">\n\n\t\t\t\t\t\t\t\t\t<div class=\"price\"><h4><span class=\"woocommerce-Price-amount amount\"><span class=\"woocommerce-Price-currencySymbol\">\u20ac<\/span>6,803.00<\/span> + IVA (se aplic\u00e1vel)<\/h4><\/div>\n\t\t\t\t\t\t\t\t\t<div class=\"stats\">\n\t\t\t\t\t\t\t\t\t\t<a rel=\"nofollow\" href=\"\/pt\/wp-json\/wp\/v2\/glossary\/165?add-to-cart=1833\" data-quantity=\"1\" data-product_id=\"1833\" data-product_sku=\"BS-4\" class=\"button product_type_simple add_to_cart_button ajax_add_to_cart btn btn-just-icon btn-simple btn-default\" title=\"Adicionar\" data-no-translation-title=\"\"><i rel=\"tooltip\" data-original-title=\"Adicionar\" class=\"fas fa-cart-plus\" data-no-translation-data-original-title=\"\"><\/i><\/a>\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/a><a href=\"\/pt\/wp-json\/wp\/v2\/glossary\/165?add-to-cart=1833\" aria-describedby=\"woocommerce_loop_add_to_cart_link_describedby_1833\" data-quantity=\"1\" class=\"button product_type_simple add_to_cart_button ajax_add_to_cart\" data-product_id=\"1833\" data-product_sku=\"BS-4\" aria-label=\"Adiciona ao carrinho: \u201cBalanset-4\u201d\" rel=\"nofollow\" data-success_message=\"\u201cBalanset-4\u201d foi adicionado ao seu carrinho\" data-no-translation=\"\" data-trp-gettext=\"\" data-no-translation-aria-label=\"\" data-no-translation-data-success_message=\"\">Adicionar<\/a>\t<span id=\"woocommerce_loop_add_to_cart_link_describedby_1833\" class=\"screen-reader-text\">\n\t\t\t<\/span>\n\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div><!-- \/.row --><div class=\"row\">\t\t\t\t\t<div class=\"col-ms-6 col-sm-6 col-md-3 shop-item\">\n\t\t\t\t\t\t<a href=\"https:\/\/vibromera.eu\/pt\/product\/magnet-stand\/\" class=\"woocommerce-LoopProduct-link woocommerce-loop-product__link\">\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<div class=\"card-image\">\n\t\t\t\t\t\t\t\t\t<a href=\"https:\/\/vibromera.eu\/pt\/product\/magnet-stand\/\" title=\"Suporte magn\u00e9tico Insize-60-kgf\">\n\t\t\t\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"230\" height=\"153\" src=\"https:\/\/vibromera.eu\/wp-content\/uploads\/2018\/05\/IMG-36-230x153.webp\" class=\"attachment-woocommerce_thumbnail size-woocommerce_thumbnail\" alt=\"Base magn\u00e9tica.\" srcset=\"https:\/\/vibromera.eu\/wp-content\/uploads\/2018\/05\/IMG-36-230x153.webp 230w, https:\/\/vibromera.eu\/wp-content\/uploads\/2018\/05\/IMG-36-600x400.webp 600w, https:\/\/vibromera.eu\/wp-content\/uploads\/2018\/05\/IMG-36-300x200.webp 300w, https:\/\/vibromera.eu\/wp-content\/uploads\/2018\/05\/IMG-36-1024x682.webp 1024w, https:\/\/vibromera.eu\/wp-content\/uploads\/2018\/05\/IMG-36-768x512.webp 768w, https:\/\/vibromera.eu\/wp-content\/uploads\/2018\/05\/IMG-36-360x240.webp 360w, https:\/\/vibromera.eu\/wp-content\/uploads\/2018\/05\/IMG-36-272x182.webp 272w, https:\/\/vibromera.eu\/wp-content\/uploads\/2018\/05\/IMG-36.webp 1280w\" sizes=\"auto, (max-width: 230px) 100vw, 230px\" \/>\t\t\t\t\t\t\t\t\t<\/a>\n\t\t\t\t\t\t\t\t\t<div class=\"ripple-container\"><\/div>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<div class=\"content\">\n\t\t\t\t\t\t\t\t<span class=\"category\"><a href=\"https:\/\/vibromera.eu\/pt\/product-category\/parts\/\" rel=\"tag\">Pe\u00e7as<\/a><\/span>\n\t\t\t\t\t\t\t\t<h4 class=\"card-title\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<a class=\"shop-item-title-link\" href=\"https:\/\/vibromera.eu\/pt\/product\/magnet-stand\/\" title=\"Suporte magn\u00e9tico Insize-60-kgf\">Suporte magn\u00e9tico Insize-60-kgf<\/a>\n\n\t\t\t\t\t\t\t\t<\/h4>\n\n\t\t\t\t\t\t\t\t\n\t\t\t\t\t\t\t\t<div class=\"footer\">\n\n\t\t\t\t\t\t\t\t\t<div class=\"price\"><h4><span class=\"woocommerce-Price-amount amount\"><span class=\"woocommerce-Price-currencySymbol\">\u20ac<\/span>46.00<\/span> + IVA (se aplic\u00e1vel)<\/h4><\/div>\n\t\t\t\t\t\t\t\t\t<div class=\"stats\">\n\t\t\t\t\t\t\t\t\t\t<a rel=\"nofollow\" href=\"\/pt\/wp-json\/wp\/v2\/glossary\/165?add-to-cart=1852\" data-quantity=\"1\" data-product_id=\"1852\" data-product_sku=\"MS-1\" class=\"button product_type_simple add_to_cart_button ajax_add_to_cart btn btn-just-icon btn-simple btn-default\" title=\"Adicionar\" data-no-translation-title=\"\"><i rel=\"tooltip\" data-original-title=\"Adicionar\" class=\"fas fa-cart-plus\" 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href=\"https:\/\/vibromera.eu\/pt\/product\/reflective-tape\/\" class=\"woocommerce-LoopProduct-link woocommerce-loop-product__link\">\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<div class=\"card-image\">\n\t\t\t\t\t\t\t\t\t<a href=\"https:\/\/vibromera.eu\/pt\/product\/reflective-tape\/\" title=\"Fita refletora\">\n\t\t\t\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"230\" height=\"153\" src=\"https:\/\/vibromera.eu\/wp-content\/uploads\/2023\/05\/s-l1600-230x153.webp\" class=\"attachment-woocommerce_thumbnail size-woocommerce_thumbnail\" alt=\"Fita refletora\" srcset=\"https:\/\/vibromera.eu\/wp-content\/uploads\/2023\/05\/s-l1600-230x153.webp 230w, https:\/\/vibromera.eu\/wp-content\/uploads\/2023\/05\/s-l1600-16x12.webp 16w, https:\/\/vibromera.eu\/wp-content\/uploads\/2023\/05\/s-l1600-360x240.webp 360w, https:\/\/vibromera.eu\/wp-content\/uploads\/2023\/05\/s-l1600-460x306.webp 460w, https:\/\/vibromera.eu\/wp-content\/uploads\/2023\/05\/s-l1600-272x182.webp 272w\" sizes=\"auto, (max-width: 230px) 100vw, 230px\" \/>\t\t\t\t\t\t\t\t\t<\/a>\n\t\t\t\t\t\t\t\t\t<div class=\"ripple-container\"><\/div>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<div class=\"content\">\n\t\t\t\t\t\t\t\t<span class=\"category\"><a href=\"https:\/\/vibromera.eu\/pt\/product-category\/parts\/\" rel=\"tag\">Pe\u00e7as<\/a><\/span>\n\t\t\t\t\t\t\t\t<h4 class=\"card-title\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<a class=\"shop-item-title-link\" href=\"https:\/\/vibromera.eu\/pt\/product\/reflective-tape\/\" title=\"Fita refletora\">Fita refletora<\/a>\n\n\t\t\t\t\t\t\t\t<\/h4>\n\n\t\t\t\t\t\t\t\t\n\t\t\t\t\t\t\t\t<div class=\"footer\">\n\n\t\t\t\t\t\t\t\t\t<div class=\"price\"><h4><span class=\"woocommerce-Price-amount amount\"><span class=\"woocommerce-Price-currencySymbol\">\u20ac<\/span>10.00<\/span> + IVA (se aplic\u00e1vel)<\/h4><\/div>\n\t\t\t\t\t\t\t\t\t<div class=\"stats\">\n\t\t\t\t\t\t\t\t\t\t<a rel=\"nofollow\" href=\"\/pt\/wp-json\/wp\/v2\/glossary\/165?add-to-cart=2329\" data-quantity=\"1\" data-product_id=\"2329\" data-product_sku=\"rt-1\" class=\"button product_type_simple add_to_cart_button ajax_add_to_cart btn btn-just-icon btn-simple btn-default\" title=\"Adicionar\" data-no-translation-title=\"\"><i rel=\"tooltip\" data-original-title=\"Adicionar\" class=\"fas fa-cart-plus\" data-no-translation-data-original-title=\"\"><\/i><\/a>\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/a><a href=\"\/pt\/wp-json\/wp\/v2\/glossary\/165?add-to-cart=2329\" aria-describedby=\"woocommerce_loop_add_to_cart_link_describedby_2329\" data-quantity=\"1\" class=\"button product_type_simple add_to_cart_button ajax_add_to_cart\" data-product_id=\"2329\" data-product_sku=\"rt-1\" aria-label=\"Adiciona ao carrinho: \u201cReflective tape\u201d\" rel=\"nofollow\" data-success_message=\"\u201cReflective tape\u201d foi adicionado ao seu carrinho\" data-no-translation=\"\" data-trp-gettext=\"\" data-no-translation-aria-label=\"\" data-no-translation-data-success_message=\"\">Adicionar<\/a>\t<span id=\"woocommerce_loop_add_to_cart_link_describedby_2329\" class=\"screen-reader-text\">\n\t\t\t<\/span>\n\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\t\t<div class=\"col-ms-6 col-sm-6 col-md-3 shop-item\">\n\t\t\t\t\t\t<a href=\"https:\/\/vibromera.eu\/pt\/product\/dynamic-balancer-balanset-1a\/\" class=\"woocommerce-LoopProduct-link woocommerce-loop-product__link\">\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<div class=\"card-image\">\n\t\t\t\t\t\t\t\t\t<a href=\"https:\/\/vibromera.eu\/pt\/product\/dynamic-balancer-balanset-1a\/\" title=\"Balanceador din\u00e2mico &quot;Balanset-1A&quot; OEM\">\n\t\t\t\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"230\" height=\"153\" src=\"https:\/\/vibromera.eu\/wp-content\/uploads\/2021\/11\/\u0411\u0430\u043b\u043a\u043e\u043c\u041a\u0438\u0442-scaled-230x153.webp\" class=\"attachment-woocommerce_thumbnail size-woocommerce_thumbnail\" alt=\"Conte\u00fado do kit Balanset-1A com unidade de interface, sensores, tac\u00f3metro e acess\u00f3rios\" srcset=\"https:\/\/vibromera.eu\/wp-content\/uploads\/2021\/11\/\u0411\u0430\u043b\u043a\u043e\u043c\u041a\u0438\u0442-scaled-230x153.webp 230w, https:\/\/vibromera.eu\/wp-content\/uploads\/2021\/11\/\u0411\u0430\u043b\u043a\u043e\u043c\u041a\u0438\u0442-scaled-600x400.webp 600w, https:\/\/vibromera.eu\/wp-content\/uploads\/2021\/11\/\u0411\u0430\u043b\u043a\u043e\u043c\u041a\u0438\u0442-scaled-300x200.webp 300w, https:\/\/vibromera.eu\/wp-content\/uploads\/2021\/11\/\u0411\u0430\u043b\u043a\u043e\u043c\u041a\u0438\u0442-scaled-1024x683.webp 1024w, https:\/\/vibromera.eu\/wp-content\/uploads\/2021\/11\/\u0411\u0430\u043b\u043a\u043e\u043c\u041a\u0438\u0442-scaled-768x512.webp 768w, https:\/\/vibromera.eu\/wp-content\/uploads\/2021\/11\/\u0411\u0430\u043b\u043a\u043e\u043c\u041a\u0438\u0442-scaled-1536x1024.webp 1536w, https:\/\/vibromera.eu\/wp-content\/uploads\/2021\/11\/\u0411\u0430\u043b\u043a\u043e\u043c\u041a\u0438\u0442-scaled-2048x1366.webp 2048w, https:\/\/vibromera.eu\/wp-content\/uploads\/2021\/11\/\u0411\u0430\u043b\u043a\u043e\u043c\u041a\u0438\u0442-scaled-360x240.webp 360w, https:\/\/vibromera.eu\/wp-content\/uploads\/2021\/11\/\u0411\u0430\u043b\u043a\u043e\u043c\u041a\u0438\u0442-scaled-272x182.webp 272w, https:\/\/vibromera.eu\/wp-content\/uploads\/2021\/11\/\u0411\u0430\u043b\u043a\u043e\u043c\u041a\u0438\u0442-scaled-e1732998877834.webp 708w\" sizes=\"auto, (max-width: 230px) 100vw, 230px\" \/>\t\t\t\t\t\t\t\t\t<\/a>\n\t\t\t\t\t\t\t\t\t<div class=\"ripple-container\"><\/div>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<div class=\"content\">\n\t\t\t\t\t\t\t\t<span class=\"category\"><a href=\"https:\/\/vibromera.eu\/pt\/product-category\/devices\/\" rel=\"tag\">Dispositivos<\/a><\/span>\n\t\t\t\t\t\t\t\t<h4 class=\"card-title\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<a class=\"shop-item-title-link\" href=\"https:\/\/vibromera.eu\/pt\/product\/dynamic-balancer-balanset-1a\/\" title=\"Balanceador din\u00e2mico &quot;Balanset-1A&quot; OEM\">Balanceador din\u00e2mico \"Balanset-1A\" OEM<\/a>\n\n\t\t\t\t\t\t\t\t<\/h4>\n\n\t\t\t\t\t\t\t\t\n\t\t\t\t\t\t\t\t<div class=\"footer\">\n\n\t\t\t\t\t\t\t\t\t<div class=\"price\"><h4><span class=\"woocommerce-Price-amount amount\"><span class=\"woocommerce-Price-currencySymbol\">\u20ac<\/span>1,735.00<\/span> + IVA (se aplic\u00e1vel)<\/h4><\/div>\n\t\t\t\t\t\t\t\t\t<div class=\"stats\">\n\t\t\t\t\t\t\t\t\t\t<a rel=\"nofollow\" href=\"\/pt\/wp-json\/wp\/v2\/glossary\/165?add-to-cart=4193\" data-quantity=\"1\" data-product_id=\"4193\" data-product_sku=\"BS-1OEM\" class=\"button product_type_simple add_to_cart_button ajax_add_to_cart btn btn-just-icon btn-simple btn-default\" title=\"Adicionar\" data-no-translation-title=\"\"><i rel=\"tooltip\" data-original-title=\"Adicionar\" class=\"fas fa-cart-plus\" data-no-translation-data-original-title=\"\"><\/i><\/a>\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/a><a href=\"\/pt\/wp-json\/wp\/v2\/glossary\/165?add-to-cart=4193\" aria-describedby=\"woocommerce_loop_add_to_cart_link_describedby_4193\" data-quantity=\"1\" class=\"button product_type_simple add_to_cart_button ajax_add_to_cart\" data-product_id=\"4193\" data-product_sku=\"BS-1OEM\" aria-label=\"Adiciona ao carrinho: \u201cDynamic balancer \u201cBalanset-1A\u201d OEM\u201d\" rel=\"nofollow\" data-success_message=\"\u201cDynamic balancer \u201cBalanset-1A\u201d OEM\u201d foi adicionado ao seu carrinho\" data-no-translation=\"\" data-trp-gettext=\"\" data-no-translation-aria-label=\"\" data-no-translation-data-success_message=\"\">Adicionar<\/a>\t<span id=\"woocommerce_loop_add_to_cart_link_describedby_4193\" class=\"screen-reader-text\">\n\t\t\t<\/span>\n\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/section>\n\t\t\n<p>A <strong>forma modal<\/strong> - tamb\u00e9m designado por modo de vibra\u00e7\u00e3o ou modo natural - \u00e9 o padr\u00e3o espacial carater\u00edstico de deforma\u00e7\u00e3o que um <a href=\"https:\/\/vibromera.eu\/pt\/glossary\/rotor\/\">rotor<\/a> quando o sistema vibra num dos seus <a href=\"https:\/\/vibromera.eu\/pt\/glossary\/natural-frequency\/\">frequ\u00eancias naturais<\/a>. Descreve a amplitude relativa e <a href=\"https:\/\/vibromera.eu\/pt\/glossary\/phase\/\">fase<\/a> de movimento em cada ponto do eixo quando o sistema oscila livremente nesse ponto espec\u00edfico <a href=\"https:\/\/vibromera.eu\/pt\/glossary\/resonance\/\">ressonante<\/a> frequ\u00eancia. Cada forma pr\u00f3pria est\u00e1 associada a uma frequ\u00eancia natural e, em conjunto, formam uma descri\u00e7\u00e3o completa do comportamento din\u00e2mico do sistema. A compreens\u00e3o das formas pr\u00f3prias \u00e9 fundamental para <a href=\"https:\/\/vibromera.eu\/pt\/glossary\/rotor-dynamics\/\">din\u00e2mica do rotor<\/a>, porque determinam onde <a href=\"https:\/\/vibromera.eu\/pt\/glossary\/critical-speed\/\">velocidades cr\u00edticas<\/a> e como o rotor responde \u00e0s for\u00e7as que o excitam.<\/p>\n<h2>1. Defini\u00e7\u00e3o e significado f\u00edsico<\/h2>\n<p>Quando uma estrutura \u00e9 perturbada e deixada a vibrar por si pr\u00f3pria, n\u00e3o se move arbitrariamente. Acomoda-se num pequeno n\u00famero de padr\u00f5es preferenciais, cada um com a sua pr\u00f3pria frequ\u00eancia, exatamente como uma corda de guitarra soa uma fundamental e uma s\u00e9rie de sobretons. Para um rotor, esses padr\u00f5es preferenciais s\u00e3o as suas formas pr\u00f3prias e as frequ\u00eancias a que aparecem s\u00e3o as suas frequ\u00eancias naturais. O perigo nas m\u00e1quinas rotativas \u00e9 que a velocidade de funcionamento de um rotor pode coincidir com uma destas frequ\u00eancias naturais; quando isso acontece, a forma pr\u00f3pria correspondente \u00e9 levada a <a href=\"https:\/\/vibromera.eu\/pt\/glossary\/resonance\/\">resson\u00e2ncia<\/a> e as amplitudes de vibra\u00e7\u00e3o aumentam acentuadamente. O conhecimento pr\u00e9vio das formas indica ao engenheiro onde \u00e9 que o rotor vai fletir mais, onde \u00e9 que quase n\u00e3o se move e, portanto, onde deve intervir.<\/p>\n<h2>2. Visualizar as formas de modo<\/h2>\n<p>As formas pr\u00f3prias s\u00e3o melhor representadas como as curvas de deflex\u00e3o do veio do rotor.<\/p>\n<h3>Primeiro Modo (Fundamental)<\/h3>\n<ul>\n<li><strong>Forma:<\/strong> um arco ou curva simples, como uma corda de saltar com uma \u00fanica sali\u00eancia.<\/li>\n<li><strong>Pontos de n\u00f3:<\/strong> nenhum internamente - o veio \u00e9 apoiado nas chumaceiras, que funcionam como n\u00f3s aproximados.<\/li>\n<li><strong>Deforma\u00e7\u00e3o m\u00e1xima:<\/strong> tipicamente perto do meio do v\u00e3o entre os rolamentos.<\/li>\n<li><strong>Frequ\u00eancia:<\/strong> a frequ\u00eancia natural mais baixa do sistema.<\/li>\n<li><strong>Velocidade cr\u00edtica:<\/strong> a primeira velocidade cr\u00edtica corresponde a este modo.<\/li>\n<\/ul>\n<h3>Segundo Modo<\/h3>\n<ul>\n<li><strong>Forma:<\/strong> uma curva em S com um n\u00f3 no meio.<\/li>\n<li><strong>Pontos de n\u00f3:<\/strong> um n\u00f3 interno, onde a deflex\u00e3o do veio \u00e9 zero.<\/li>\n<li><strong>Deforma\u00e7\u00e3o m\u00e1xima:<\/strong> em dois locais, um de cada lado do n\u00f3.<\/li>\n<li><strong>Frequ\u00eancia:<\/strong> mais elevado do que o primeiro modo, frequentemente tr\u00eas a cinco vezes a sua frequ\u00eancia.<\/li>\n<li><strong>Velocidade cr\u00edtica:<\/strong> a segunda velocidade cr\u00edtica.<\/li>\n<\/ul>\n<h3>Terceiro Modo e Superior<\/h3>\n<ul>\n<li><strong>Forma:<\/strong> padr\u00f5es de onda cada vez mais complexos.<\/li>\n<li><strong>Pontos de n\u00f3:<\/strong> dois para o terceiro modo, tr\u00eas para o quarto, e assim por diante.<\/li>\n<li><strong>Frequ\u00eancia:<\/strong> progressivamente mais elevadas.<\/li>\n<li><strong>Import\u00e2ncia pr\u00e1tica:<\/strong> normalmente s\u00f3 \u00e9 relevante para os casos de velocidade muito elevada ou muito <a href=\"https:\/\/vibromera.eu\/pt\/glossary\/flexible-rotor\/\">rotores flex\u00edveis<\/a>.<\/li>\n<\/ul>\n<h2>3. Principais carater\u00edsticas das formas modais<\/h2>\n<h3>Ortogonalidade<\/h3>\n<p>As diferentes formas de modo s\u00e3o matematicamente ortogonais \u2014 ou seja, independentes. Num sistema linear ideal, a energia introduzida numa frequ\u00eancia modal n\u00e3o excita as outras, o que \u00e9 precisamente o que permite aos engenheiros tratar e corrigir cada modo separadamente.<\/p>\n<h3>Normaliza\u00e7\u00e3o<\/h3>\n<p>As formas pr\u00f3prias s\u00e3o normalmente normalizadas, com a deflex\u00e3o m\u00e1xima escalada para um valor de refer\u00eancia (frequentemente 1,0) para que as formas possam ser comparadas. A magnitude real da deflex\u00e3o em servi\u00e7o depende da amplitude de excita\u00e7\u00e3o e do sistema <a href=\"https:\/\/vibromera.eu\/pt\/glossary\/damping\/\">amortecimento<\/a>.<\/p>\n<h3>Pontos nodais<\/h3>\n<p><strong>N\u00f3s<\/strong> s\u00e3o localiza\u00e7\u00f5es ao longo do veio onde a deflex\u00e3o permanece zero durante a vibra\u00e7\u00e3o nesse modo. O n\u00famero de n\u00f3s internos \u00e9 igual ao n\u00famero do modo menos um:<\/p>\n<ul>\n<li>primeiro modo: 0 n\u00f3s internos;<\/li>\n<li>segundo modo: 1 n\u00f3 interno;<\/li>\n<li>terceiro modo: 2 n\u00f3s internos.<\/li>\n<\/ul>\n<p>A <a href=\"https:\/\/vibromera.eu\/pt\/glossary\/nodal-point\/\">ponto nodal<\/a> \u00e9 uma posi\u00e7\u00e3o de repouso num determinado modo \u2014 um facto com consequ\u00eancias diretas tanto para a coloca\u00e7\u00e3o dos sensores como para o balanceamento.<\/p>\n<h3>Pontos antin\u00f3s<\/h3>\n<p><strong>Antin\u00f3s<\/strong> s\u00e3o os locais de deflex\u00e3o m\u00e1xima numa forma pr\u00f3pria. S\u00e3o os pontos de maior tens\u00e3o de flex\u00e3o e, por conseguinte, os locais mais prov\u00e1veis de fadiga e falha durante a vibra\u00e7\u00e3o ressonante.<\/p>\n<h2>4. Porque \u00e9 que as formas de modo s\u00e3o importantes<\/h2>\n<h3>Previs\u00e3o da velocidade cr\u00edtica<\/h3>\n<p>Cada modo de vibra\u00e7\u00e3o corresponde a um <a href=\"https:\/\/vibromera.eu\/pt\/glossary\/critical-speed\/\">velocidade cr\u00edtica<\/a>. Quando a velocidade de funcionamento corresponde a uma frequ\u00eancia natural, esse modo \u00e9 excitado, o rotor deflecte segundo o padr\u00e3o da forma de modo e <a href=\"https:\/\/vibromera.eu\/pt\/glossary\/unbalance\/\">desequil\u00edbrio<\/a> as for\u00e7as produzem a sua maior vibra\u00e7\u00e3o onde se alinham com os antinodos. A <a href=\"https:\/\/vibromera.eu\/pt\/calculators\/rotor-critical-speed\/\">calculadora da velocidade cr\u00edtica do rotor<\/a> d\u00e1 uma primeira estimativa r\u00e1pida da posi\u00e7\u00e3o destas velocidades em rela\u00e7\u00e3o \u00e0 gama de funcionamento.<\/p>\n<h3>Estrat\u00e9gia de Equilibragem<\/h3>\n<p>As formas pr\u00f3prias orientam a escolha de <a href=\"https:\/\/vibromera.eu\/pt\/glossary\/equilibrio-2\/\">equilibragem<\/a> abordagem:<\/p>\n<ul>\n<li><strong><a href=\"https:\/\/vibromera.eu\/pt\/glossary\/rigid-rotor\/\">Rotores r\u00edgidos<\/a><\/strong> funcionar abaixo da primeira velocidade cr\u00edtica; simples <a href=\"https:\/\/vibromera.eu\/pt\/glossary\/two-plane-balancing\/\">equilibragem em dois planos<\/a> \u00e9 suficiente.<\/li>\n<li><strong><a href=\"https:\/\/vibromera.eu\/pt\/glossary\/flexible-rotor\/\">Rotores flex\u00edveis<\/a><\/strong> funcionam acima do primeiro cr\u00edtico e podem necessitar de <a href=\"https:\/\/vibromera.eu\/pt\/glossary\/modal-balancing\/\">equil\u00edbrio modal<\/a> que visam formas pr\u00f3prias espec\u00edficas.<\/li>\n<li><strong>Localiza\u00e7\u00e3o do plano de corre\u00e7\u00e3o<\/strong> \u00e9 mais eficaz nos antin\u00f3s, onde uma determinada massa tem a maior influ\u00eancia no modo.<\/li>\n<li><strong>Localiza\u00e7\u00f5es de n\u00f3s<\/strong> s\u00e3o o caso oposto: a <a href=\"https:\/\/vibromera.eu\/pt\/glossary\/correction-weight\/\">peso de correc\u00e7\u00e3o<\/a> colocado num n\u00f3 n\u00e3o tem praticamente qualquer efeito sobre esse modo.<\/li>\n<\/ul>\n<h3>An\u00e1lise de Falhas<\/h3>\n<p>As formas pr\u00f3prias tamb\u00e9m explicam onde surgem os danos. As fissuras de fadiga formam-se normalmente nos antin\u00f3s, onde a tens\u00e3o de flex\u00e3o atinge o seu ponto mais alto; \u00e9 mais prov\u00e1vel que surjam danos nos rolamentos quando a deflex\u00e3o \u00e9 elevada; e <a href=\"https:\/\/vibromera.eu\/pt\/glossary\/rotor-rub\/\">fric\u00e7\u00f5es<\/a> ocorrem quando a deflex\u00e3o do veio aproxima o rotor de pe\u00e7as estacion\u00e1rias.<\/p>\n<h2>5. Determina\u00e7\u00e3o das formas de modo<\/h2>\n<h3>M\u00e9todos Anal\u00edticos<\/h3>\n<h4>An\u00e1lise de Elementos Finitos (FEA)<\/h4>\n<ul>\n<li>A abordagem moderna mais comum.<\/li>\n<li>O rotor \u00e9 modelado como uma cadeia de elementos de viga com massa, rigidez e in\u00e9rcia.<\/li>\n<li>Uma an\u00e1lise de valores pr\u00f3prios devolve as frequ\u00eancias naturais e as formas pr\u00f3prias correspondentes.<\/li>\n<li>Pode levar em conta geometrias complexas, propriedades de materiais e caracter\u00edsticas de rolamentos.<\/li>\n<\/ul>\n<h4>M\u00e9todo da matriz de transfer\u00eancia<\/h4>\n<ul>\n<li>Uma t\u00e9cnica anal\u00edtica cl\u00e1ssica.<\/li>\n<li>O rotor \u00e9 dividido em esta\u00e7\u00f5es com propriedades conhecidas.<\/li>\n<li>As matrizes de transfer\u00eancia propagam a deflex\u00e3o e a for\u00e7a ao longo do veio.<\/li>\n<li>Eficiente para configura\u00e7\u00f5es de eixo relativamente simples.<\/li>\n<\/ul>\n<h4>Teoria da viga cont\u00ednua<\/h4>\n<ul>\n<li>Para veios uniformes, existem solu\u00e7\u00f5es anal\u00edticas em forma fechada.<\/li>\n<li>Fornece express\u00f5es exatas para casos simples.<\/li>\n<li>\u00datil para o ensino e para a conce\u00e7\u00e3o preliminar.<\/li>\n<\/ul>\n<h3>M\u00e9todos Experimentais<\/h3>\n<h4>Ensaio Modal (Ensaio de Impacto)<\/h4>\n<ul>\n<li>Golpear o veio com um martelo instrumentado em v\u00e1rios locais - um <a href=\"https:\/\/vibromera.eu\/pt\/glossary\/bump-test\/\">teste de impacto<\/a>.<\/li>\n<li>Medir a resposta com <a href=\"https:\/\/vibromera.eu\/pt\/glossary\/accelerometer\/\">aceler\u00f3metros<\/a> em v\u00e1rios pontos.<\/li>\n<li>O resultado <a href=\"https:\/\/vibromera.eu\/pt\/glossary\/frequency-response-function\/\">fun\u00e7\u00f5es de resposta de frequ\u00eancia<\/a> revelam as frequ\u00eancias naturais.<\/li>\n<li>A forma do modo \u00e9 extra\u00edda das amplitudes e fases relativas da resposta.<\/li>\n<\/ul>\n<h4>Medi\u00e7\u00e3o da forma de deflex\u00e3o operacional (ODS)<\/h4>\n<ul>\n<li>Medir a vibra\u00e7\u00e3o em v\u00e1rios locais durante o funcionamento normal.<\/li>\n<li>Perto de uma velocidade cr\u00edtica, o <a href=\"https:\/\/vibromera.eu\/pt\/glossary\/ods-analysis\/\">forma de deflex\u00e3o em funcionamento<\/a> aproxima a forma do modo.<\/li>\n<li>Pode ser efectuada com o rotor in situ.<\/li>\n<li>Para tal, s\u00e3o necess\u00e1rios v\u00e1rios sensores ou uma t\u00e9cnica de sensores itinerantes.<\/li>\n<\/ul>\n<h4>Matrizes de sondas de proximidade<\/h4>\n<ul>\n<li>Sem contacto <a href=\"https:\/\/vibromera.eu\/pt\/glossary\/proximity-probe\/\">sondas de proximidade<\/a> em v\u00e1rias localiza\u00e7\u00f5es axiais.<\/li>\n<li>Medir diretamente a deflex\u00e3o do veio.<\/li>\n<li>Durante <a href=\"https:\/\/vibromera.eu\/pt\/glossary\/coastdown-analysis\/\">arranque ou desacelera\u00e7\u00e3o<\/a>, o padr\u00e3o de deflex\u00e3o revela as formas pr\u00f3prias.<\/li>\n<li>O m\u00e9todo experimental mais exato para m\u00e1quinas que est\u00e3o efetivamente em funcionamento.<\/li>\n<\/ul>\n<h2>6. O que altera a forma de um modo<\/h2>\n<h3>Efeitos da rigidez do rolamento<\/h3>\n<ul>\n<li><strong>Rolamentos r\u00edgidos:<\/strong> formam-se n\u00f3s nos locais de apoio e as formas pr\u00f3prias s\u00e3o mais limitadas.<\/li>\n<li><strong>Rolamentos flex\u00edveis:<\/strong> o movimento significativo ocorre nos rolamentos e as formas pr\u00f3prias s\u00e3o mais distribu\u00eddas.<\/li>\n<li><strong>Rolamentos assim\u00e9tricos:<\/strong> as formas pr\u00f3prias diferem entre as dire\u00e7\u00f5es horizontal e vertical.<\/li>\n<\/ul>\n<h3>Depend\u00eancia de velocidade<\/h3>\n<p>Para veios rotativos, as formas pr\u00f3prias podem mudar com a velocidade devido a:<\/p>\n<ul>\n<li><strong><a href=\"https:\/\/vibromera.eu\/pt\/glossary\/gyroscopic-effect\/\">Efeitos girosc\u00f3picos<\/a>:<\/strong> dividem os modos em rota\u00e7\u00e3o para a frente e para tr\u00e1s.<\/li>\n<li><strong>Altera\u00e7\u00f5es da rigidez das chumaceiras:<\/strong> filme fluido <a href=\"https:\/\/vibromera.eu\/pt\/glossary\/journal-bearing\/\">mancais de deslizamento<\/a> endurecem com o aumento da velocidade.<\/li>\n<li><strong>Refor\u00e7o centr\u00edfugo:<\/strong> a velocidades muito elevadas, as for\u00e7as centr\u00edfugas aumentam a rigidez dos componentes delgados.<\/li>\n<\/ul>\n<h3>Precess\u00e3o direta e retr\u00f3grada<\/h3>\n<p>Nos sistemas rotativos, cada modo pode assumir duas formas. Em <strong>precess\u00e3o direta<\/strong> o eixo <a href=\"https:\/\/vibromera.eu\/pt\/glossary\/orbit\/\">\u00f3rbita<\/a> gira na mesma dire\u00e7\u00e3o que o pr\u00f3prio eixo; em <strong>precess\u00e3o retr\u00f3grada<\/strong> gira no sentido oposto. Os efeitos girosc\u00f3picos fazem com que as vers\u00f5es de precess\u00e3o direta e retr\u00f3grada ocorram em frequ\u00eancias diferentes \u2014 uma divis\u00e3o de frequ\u00eancia que um <a href=\"https:\/\/vibromera.eu\/pt\/glossary\/campbell-diagram\/\">Diagrama de Campbell<\/a> \u00e9 apresentado de forma clara.<\/p>\n<h2>7. Aplica\u00e7\u00f5es pr\u00e1ticas<\/h2>\n<h3>Otimiza\u00e7\u00e3o da conce\u00e7\u00e3o<\/h3>\n<p>Os engenheiros utilizam a an\u00e1lise da forma modal para posicionar as chumaceiras de modo a que os antin\u00f3s n\u00e3o caiam nas localiza\u00e7\u00f5es das chumaceiras, para dimensionar os di\u00e2metros dos veios que afastam as velocidades cr\u00edticas da gama de funcionamento, para selecionar a rigidez das chumaceiras que molda favoravelmente a resposta modal e para adicionar ou remover massa em pontos estrat\u00e9gicos para alterar as frequ\u00eancias naturais.<\/p>\n<h3>Solu\u00e7\u00e3o de problemas<\/h3>\n<p>Quando surgem vibra\u00e7\u00f5es excessivas, o analista compara a velocidade de funcionamento com as velocidades cr\u00edticas previstas, identifica se a m\u00e1quina est\u00e1 a funcionar perto de uma resson\u00e2ncia, determina qual o modo que est\u00e1 a ser excitado e seleciona uma modifica\u00e7\u00e3o que afasta o modo problem\u00e1tico da velocidade de funcionamento.<\/p>\n<h3>Equilibragem modal<\/h3>\n<p><a href=\"https:\/\/vibromera.eu\/pt\/glossary\/modal-balancing\/\">Equilibragem modal<\/a> de rotores flex\u00edveis depende inteiramente do conhecimento das formas dos modos: cada modo \u00e9 equilibrado independentemente, os pesos de corre\u00e7\u00e3o s\u00e3o distribu\u00eddos de forma a corresponderem ao padr\u00e3o da forma do modo, os pesos colocados nos n\u00f3s n\u00e3o t\u00eam qualquer efeito nesse modo e os planos de corre\u00e7\u00e3o ideais situam-se nos antin\u00f3s.<\/p>\n<h2>8. Visualiza\u00e7\u00e3o e comunica\u00e7\u00e3o<\/h2>\n<p>As formas modais s\u00e3o apresentadas de v\u00e1rias formas \u2014 curvas de deflex\u00e3o 2D da deflex\u00e3o lateral em fun\u00e7\u00e3o da posi\u00e7\u00e3o axial; anima\u00e7\u00f5es do veio oscilante; representa\u00e7\u00f5es 3D para geometrias complexas ou acopladas; mapas de cores que codificam a magnitude da deflex\u00e3o; e dados tabulares que fornecem a deflex\u00e3o num\u00e9rica em esta\u00e7\u00f5es discretas.<\/p>\n<h2>9. Formas modais acopladas e complexas<\/h2>\n<h3>Acoplamento lateral-torcional<\/h3>\n<p>Em alguns sistemas, a flex\u00e3o (lateral) e a tor\u00e7\u00e3o (<a href=\"https:\/\/vibromera.eu\/pt\/glossary\/torsional-vibration\/\">de tor\u00e7\u00e3o<\/a>), os movimentos acoplam-se uns aos outros - um comportamento observado com sec\u00e7\u00f5es transversais n\u00e3o circulares ou cargas deslocadas. A forma pr\u00f3pria inclui ent\u00e3o a deflex\u00e3o lateral e a tor\u00e7\u00e3o angular, e a an\u00e1lise necess\u00e1ria \u00e9 correspondentemente mais complexa.<\/p>\n<h3>Modos de flex\u00e3o acoplados<\/h3>\n<p>Em sistemas com rigidez assim\u00e9trica, os modos horizontal e vertical acoplam-se; as formas modais tornam-se el\u00edpticas em vez de planas. Isto \u00e9 comum quando os rolamentos ou apoios s\u00e3o anisotr\u00f3picos.<\/p>\n<h2>10. Normas e diretrizes<\/h2>\n<p>V\u00e1rias normas abordam a an\u00e1lise das formas modais. <a href=\"https:\/\/vibromera.eu\/pt\/glossary\/api-684\/\">API 684<\/a> fornece diretrizes para a an\u00e1lise da din\u00e2mica do rotor, incluindo o c\u00e1lculo das formas modais; <a href=\"https:\/\/vibromera.eu\/pt\/glossary\/iso-21940-11\/\">ISO 21940-11<\/a> (o sucessor moderno da ISO 1940-1) faz refer\u00eancia \u00e0s formas modais no contexto da equilibragem de rotores flex\u00edveis; e a norma alem\u00e3 VDI 3839 aborda considera\u00e7\u00f5es modais para rotores flex\u00edveis.<\/p>\n<h2>11. Rela\u00e7\u00e3o com os diagramas de Campbell e a medi\u00e7\u00e3o no terreno<\/h2>\n<p>A <a href=\"https:\/\/vibromera.eu\/pt\/glossary\/campbell-diagram\/\">Diagrama de Campbell<\/a> tra\u00e7a as frequ\u00eancias naturais em fun\u00e7\u00e3o da velocidade, cada curva representando um modo. A forma modal por detr\u00e1s de cada curva determina a intensidade com que o desequil\u00edbrio em v\u00e1rios locais excita esse modo, onde os sensores devem ser colocados para uma sensibilidade m\u00e1xima e que tipo de corre\u00e7\u00e3o de equil\u00edbrio funcionar\u00e1 melhor. No terreno, a liga\u00e7\u00e3o pr\u00e1tica entre as formas pr\u00f3prias e a a\u00e7\u00e3o corretiva \u00e9 o analisador na bancada: uma vez que a an\u00e1lise da forma pr\u00f3pria identifica os antinodos como os planos de corre\u00e7\u00e3o eficazes, um instrumento port\u00e1til de dois canais, como o <a href=\"https:\/\/vibromera.eu\/pt\/produto\/balanset-1\/\">Balanset-1A<\/a> mede a amplitude 1\u00d7 e a fase nas chumaceiras e calcula os pesos de corre\u00e7\u00e3o, permitindo que o engenheiro atue precisamente sobre os planos que a forma modal destacou. Compreender as formas modais desta forma transforma a din\u00e2mica do rotor de uma previs\u00e3o matem\u00e1tica abstrata numa vis\u00e3o f\u00edsica sobre o comportamento de m\u00e1quinas reais \u2014 permitindo uma melhor conce\u00e7\u00e3o, uma resolu\u00e7\u00e3o de problemas mais precisa e uma equilibragem mais eficaz para todos os tipos de equipamento rotativo.<\/p>\n<hr>\n<p><a href=\"https:\/\/vibromera.eu\/pt\/glossary\/\">\u2190 Voltar ao \u00edndice principal<\/a><\/p>","protected":false},"excerpt":{"rendered":"<p>Aprenda sobre modos de vibra\u00e7\u00e3o, os padr\u00f5es de deflex\u00e3o caracter\u00edsticos de eixos rotativos em frequ\u00eancias naturais, essenciais para a compreens\u00e3o de velocidades cr\u00edticas e do comportamento de rotores flex\u00edveis.<\/p>","protected":false},"featured_media":0,"template":"","meta":{"ai_generated_summary":"","footnotes":""},"categories":[109,111],"tags":[],"class_list":["post-165","glossary","type-glossary","status-publish","hentry","category-glossary","category-rotor-balancing"],"_links":{"self":[{"href":"https:\/\/vibromera.eu\/pt\/wp-json\/wp\/v2\/glossary\/165","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/vibromera.eu\/pt\/wp-json\/wp\/v2\/glossary"}],"about":[{"href":"https:\/\/vibromera.eu\/pt\/wp-json\/wp\/v2\/types\/glossary"}],"version-history":[{"count":1,"href":"https:\/\/vibromera.eu\/pt\/wp-json\/wp\/v2\/glossary\/165\/revisions"}],"predecessor-version":[{"id":101438,"href":"https:\/\/vibromera.eu\/pt\/wp-json\/wp\/v2\/glossary\/165\/revisions\/101438"}],"wp:attachment":[{"href":"https:\/\/vibromera.eu\/pt\/wp-json\/wp\/v2\/media?parent=165"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/vibromera.eu\/pt\/wp-json\/wp\/v2\/categories?post=165"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/vibromera.eu\/pt\/wp-json\/wp\/v2\/tags?post=165"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}