{"id":125,"date":"2025-10-31T00:25:51","date_gmt":"2025-10-31T00:25:51","guid":{"rendered":"https:\/\/vibromera.eu\/glossary\/frame-resonance\/"},"modified":"2026-05-23T22:51:28","modified_gmt":"2026-05-23T22:51:28","slug":"frame-resonance","status":"publish","type":"glossary","link":"https:\/\/vibromera.eu\/ro\/glossary\/frame-resonance\/","title":{"rendered":"Ce este rezonan\u021ba cadrului? Vibra\u021bia structurii ma\u0219inii"},"content":{"rendered":"<h1>\u00cen\u021belegerea rezonan\u021bei cadrului<\/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\/ro\/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\/ro\/product\/balanset-1\/\" title=\"Echilibrator portabil \u0219i analizor de vibra\u021bii 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 complet \u2014 echilibrator portabil \u0219i analizor de vibra\u021bii\" 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\/ro\/product-category\/devices\/\" rel=\"tag\">Dispozitive<\/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\/ro\/product\/balanset-1\/\" title=\"Echilibrator portabil \u0219i analizor de vibra\u021bii Balanset-1A\">Echilibrator portabil \u0219i analizor de vibra\u021bii 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> + TVA (dac\u0103 este cazul)<\/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=\"\/ro\/wp-json\/wp\/v2\/glossary\/125?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=\"Adaug\u0103 \u00een co\u0219\" data-no-translation-title=\"\"><i rel=\"tooltip\" data-original-title=\"Adaug\u0103 \u00een co\u0219\" 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=\"\/ro\/wp-json\/wp\/v2\/glossary\/125?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=\"Adaug\u0103 \u00een co\u0219: &amp;lbquo;Portable balancer &amp; Vibration analyzer Balanset-1A\u201d\" rel=\"nofollow\" data-success_message=\"\u201ePortable balancer &amp; Vibration analyzer Balanset-1A\u201d a fost ad\u0103ugat \u00een co\u0219\" data-no-translation=\"\" data-trp-gettext=\"\" data-no-translation-aria-label=\"\" data-no-translation-data-success_message=\"\">Adaug\u0103 \u00een co\u0219<\/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\/ro\/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\/ro\/product\/vibration-sensor\/\" title=\"Senzor de vibra\u021bii\">\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=\"Prim-plan senzor de vibra\u021bii 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\/ro\/product-category\/parts\/\" rel=\"tag\">Piese<\/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\/ro\/product\/vibration-sensor\/\" title=\"Senzor de vibra\u021bii\">Senzor de vibra\u021bii<\/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> + TVA (dac\u0103 este cazul)<\/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=\"\/ro\/wp-json\/wp\/v2\/glossary\/125?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=\"Adaug\u0103 \u00een co\u0219\" data-no-translation-title=\"\"><i rel=\"tooltip\" data-original-title=\"Adaug\u0103 \u00een co\u0219\" 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=\"\/ro\/wp-json\/wp\/v2\/glossary\/125?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=\"Adaug\u0103 \u00een co\u0219: &amp;lbquo;Vibration sensor\u201d\" rel=\"nofollow\" data-success_message=\"\u201eVibration sensor\u201d a fost ad\u0103ugat \u00een co\u0219\" data-no-translation=\"\" data-trp-gettext=\"\" data-no-translation-aria-label=\"\" data-no-translation-data-success_message=\"\">Adaug\u0103 \u00een co\u0219<\/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\/ro\/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\/ro\/product\/optical-sensor-for-balanset-and-arbalance\/\" title=\"Senzor optic (tahometru cu 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=\"Senzor optic (tahometru cu 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\/ro\/product-category\/parts\/\" rel=\"tag\">Piese<\/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\/ro\/product\/optical-sensor-for-balanset-and-arbalance\/\" title=\"Senzor optic (tahometru cu laser)\">Senzor optic (tahometru cu 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> + TVA (dac\u0103 este cazul)<\/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=\"\/ro\/wp-json\/wp\/v2\/glossary\/125?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=\"Adaug\u0103 \u00een co\u0219\" data-no-translation-title=\"\"><i rel=\"tooltip\" data-original-title=\"Adaug\u0103 \u00een co\u0219\" 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=\"\/ro\/wp-json\/wp\/v2\/glossary\/125?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=\"Adaug\u0103 \u00een co\u0219: &amp;lbquo;Optical Sensor (Laser Tachometer)\u201d\" rel=\"nofollow\" data-success_message=\"\u201eOptical Sensor (Laser Tachometer)\u201d a fost ad\u0103ugat \u00een co\u0219\" data-no-translation=\"\" data-trp-gettext=\"\" data-no-translation-aria-label=\"\" data-no-translation-data-success_message=\"\">Adaug\u0103 \u00een co\u0219<\/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\/ro\/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\/ro\/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 echilibrare a rotorului Vibromera: geant\u0103 de transport, condi\u021bioner de semnal multicanal, analizor portabil, baz\u0103 magnetic\u0103, senzori de vibra\u021bii \u0219i cabluri spiralate.\" 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\/ro\/product-category\/devices\/\" rel=\"tag\">Dispozitive<\/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\/ro\/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> + TVA (dac\u0103 este cazul)<\/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=\"\/ro\/wp-json\/wp\/v2\/glossary\/125?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=\"Adaug\u0103 \u00een co\u0219\" data-no-translation-title=\"\"><i rel=\"tooltip\" data-original-title=\"Adaug\u0103 \u00een co\u0219\" 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=\"\/ro\/wp-json\/wp\/v2\/glossary\/125?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=\"Adaug\u0103 \u00een co\u0219: &amp;lbquo;Balanset-4\u201d\" rel=\"nofollow\" data-success_message=\"\u201eBalanset-4\u201d a fost ad\u0103ugat \u00een co\u0219\" data-no-translation=\"\" data-trp-gettext=\"\" data-no-translation-aria-label=\"\" data-no-translation-data-success_message=\"\">Adaug\u0103 \u00een co\u0219<\/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\/ro\/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\/ro\/product\/magnet-stand\/\" title=\"Stand magnetic 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=\"Baza magnetic\u0103.\" 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\/ro\/product-category\/parts\/\" rel=\"tag\">Piese<\/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\/ro\/product\/magnet-stand\/\" title=\"Stand magnetic Insize-60-kgf\">Stand magnetic 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> + TVA (dac\u0103 este cazul)<\/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=\"\/ro\/wp-json\/wp\/v2\/glossary\/125?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=\"Adaug\u0103 \u00een co\u0219\" data-no-translation-title=\"\"><i rel=\"tooltip\" data-original-title=\"Adaug\u0103 \u00een co\u0219\" 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=\"\/ro\/wp-json\/wp\/v2\/glossary\/125?add-to-cart=1852\" aria-describedby=\"woocommerce_loop_add_to_cart_link_describedby_1852\" data-quantity=\"1\" class=\"button product_type_simple add_to_cart_button ajax_add_to_cart\" data-product_id=\"1852\" data-product_sku=\"MS-1\" aria-label=\"Adaug\u0103 \u00een co\u0219: &amp;lbquo;Magnetic Stand Insize-60-kgf\u201d\" rel=\"nofollow\" data-success_message=\"\u201eMagnetic Stand Insize-60-kgf\u201d a fost ad\u0103ugat \u00een co\u0219\" data-no-translation=\"\" data-trp-gettext=\"\" data-no-translation-aria-label=\"\" data-no-translation-data-success_message=\"\">Adaug\u0103 \u00een co\u0219<\/a>\t<span id=\"woocommerce_loop_add_to_cart_link_describedby_1852\" 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\/ro\/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\/ro\/product\/reflective-tape\/\" title=\"Band\u0103 reflectorizant\u0103\">\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=\"Band\u0103 reflectorizant\u0103\" 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\/ro\/product-category\/parts\/\" rel=\"tag\">Piese<\/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\/ro\/product\/reflective-tape\/\" title=\"Band\u0103 reflectorizant\u0103\">Band\u0103 reflectorizant\u0103<\/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> + TVA (dac\u0103 este cazul)<\/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=\"\/ro\/wp-json\/wp\/v2\/glossary\/125?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=\"Adaug\u0103 \u00een co\u0219\" data-no-translation-title=\"\"><i rel=\"tooltip\" data-original-title=\"Adaug\u0103 \u00een co\u0219\" 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=\"\/ro\/wp-json\/wp\/v2\/glossary\/125?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=\"Adaug\u0103 \u00een co\u0219: &amp;lbquo;Reflective tape\u201d\" rel=\"nofollow\" data-success_message=\"\u201eReflective tape\u201d a fost ad\u0103ugat \u00een co\u0219\" data-no-translation=\"\" data-trp-gettext=\"\" data-no-translation-aria-label=\"\" data-no-translation-data-success_message=\"\">Adaug\u0103 \u00een co\u0219<\/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\/ro\/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\/ro\/product\/dynamic-balancer-balanset-1a\/\" title=\"Echilibrator dinamic &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=\"Con\u021binutul kitului Balanset-1A cu unitate de interfa\u021b\u0103, senzori, tahometru \u0219i accesorii\" 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\/ro\/product-category\/devices\/\" rel=\"tag\">Dispozitive<\/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\/ro\/product\/dynamic-balancer-balanset-1a\/\" title=\"Echilibrator dinamic &quot;Balanset-1A&quot; OEM\">Echilibrator dinamic \"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> + TVA (dac\u0103 este cazul)<\/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=\"\/ro\/wp-json\/wp\/v2\/glossary\/125?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=\"Adaug\u0103 \u00een co\u0219\" data-no-translation-title=\"\"><i rel=\"tooltip\" data-original-title=\"Adaug\u0103 \u00een co\u0219\" 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=\"\/ro\/wp-json\/wp\/v2\/glossary\/125?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=\"Adaug\u0103 \u00een co\u0219: &amp;lbquo;Dynamic balancer \u201cBalanset-1A\u201d OEM\u201d\" rel=\"nofollow\" data-success_message=\"\u201eDynamic balancer \u201cBalanset-1A\u201d OEM\u201d a fost ad\u0103ugat \u00een co\u0219\" data-no-translation=\"\" data-trp-gettext=\"\" data-no-translation-aria-label=\"\" data-no-translation-data-success_message=\"\">Adaug\u0103 \u00een co\u0219<\/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><strong>Rezonan\u021ba cadrului<\/strong> este o form\u0103 specific\u0103 a <a href=\"https:\/\/vibromera.eu\/ro\/glossary\/structural-resonance\/\">rezonan\u021b\u0103 structural\u0103<\/a> \u00een care propriul cadru, carcasa sau \u00eenveli\u0219ul unei ma\u0219ini vibreaz\u0103 la una dintre <a href=\"https:\/\/vibromera.eu\/ro\/glossary\/natural-frequency\/\">frecven\u021be naturale<\/a> ca r\u0103spuns la excita\u021bia provenit\u0103 de la componentele rotative. Spre deosebire de funda\u021bie sau <a href=\"https:\/\/vibromera.eu\/ro\/glossary\/pedestal-looseness\/\">pedestal<\/a> rezonan\u021bele, care implic\u0103 structura de sus\u021binere de sub ma\u0219in\u0103, rezonan\u021ba cadrului apare chiar \u00een corpul ma\u0219inii \u2014 structura din font\u0103 sau din o\u021bel sudat care \u00eenconjoar\u0103 elementele rotative. Atunci c\u00e2nd o frecven\u021b\u0103 de excita\u021bie coincide cu o frecven\u021b\u0103 natural\u0103 a cadrului, <a href=\"https:\/\/vibromera.eu\/ro\/glossary\/resonance\/\">rezonan\u021b\u0103<\/a> amplific\u0103 mi\u0219carea cu mult peste ceea ce ar provoca singur\u0103 for\u021ba de excita\u021bie.<\/p>\n<p>Rezonan\u021ba cadrului este frecvent\u0103 la ma\u0219inile cu carcase mari \u0219i relativ u\u0219oare \u2014 ventilatoare, suflante, pompe \u0219i motoare. De obicei, se manifest\u0103 prin zgomot excesiv, vibra\u021bii vizibile ale capacelor sau panourilor \u0219i valori ridicate de <a href=\"https:\/\/vibromera.eu\/ro\/glossary\/vibration\/\">vibra\u021bii<\/a> citite pe cadru, care sunt complet dispropor\u021bionate fa\u021b\u0103 de vibra\u021bia real\u0103 a rotorului. Deoarece simptomul pare alarmant, rezonan\u021ba cadrului este una dintre cele mai frecvent diagnosticate gre\u0219it probleme din teren: un analist vede o valoare uria\u0219\u0103 \u0219i condamn\u0103 un rotor perfect echilibrat.<\/p>\n<h2>1. Defini\u021bie: Ce este rezonan\u021ba cadrului?<\/h2>\n<p>Fiecare structur\u0103 are un set de frecven\u021be proprii \u0219i de moduri proprii de vibra\u021bie asociate la care prefer\u0103 s\u0103 se flexeze. Cadrul unei ma\u0219ini nu face excep\u021bie. Pere\u021bii, capacele de cap\u0103t, picioarele \u0219i panourile sale au, fiecare, moduri de \u00eencovoiere \u0219i de torsiune, iar un panou sub\u021bire de acoperire poate avea, \u00een domeniul audibil, mai multe moduri proprii. At\u00e2t timp c\u00e2t aceste frecven\u021be r\u0103m\u00e2n la distan\u021b\u0103 de frecven\u021bele de excita\u021bie ale ma\u0219inii, cadrul transmite for\u021ba pur \u0219i simplu \u00een mod silen\u021bios. Problemele apar atunci c\u00e2nd o frecven\u021b\u0103 de func\u021bionare coincide cu un mod al cadrului, iar structura \u00eencepe s\u0103 rezoneze.<\/p>\n<p>Semnul distinctiv al rezonan\u021bei cadrului este <em>amplification<\/em>: cadrul se mi\u0219c\u0103 de c\u00e2teva ori mai mult dec\u00e2t lag\u0103rele pe care le \u00eenconjoar\u0103. Energia provine de la rotor, \u00eens\u0103 r\u0103spunsul apar\u021bine structurii. Acesta este motivul pentru care m\u0103sur\u0103torile efectuate pe cadru pot indica valori de cinci p\u00e2n\u0103 la zece ori mai mari dec\u00e2t m\u0103sur\u0103torile de pe carcasa lag\u0103rului aflat\u0103 la doar c\u00e2\u021biva centimetri distan\u021b\u0103. Proprietatea fundamental\u0103 care stabile\u0219te unde se situeaz\u0103 aceste moduri este <a href=\"https:\/\/vibromera.eu\/ro\/glossary\/stiffness\/\">rigiditate<\/a> raportat\u0103 la mas\u0103 \u2014 rigidiza\u021bi cadrul, iar frecven\u021bele cresc; ad\u0103uga\u021bi mas\u0103, iar acestea scad.<\/p>\n<h2>2. Situa\u021bii frecvente de rezonan\u021b\u0103 a structurii portante<\/h2>\n<h3>Carcase de motoare \u0219i generatoare<\/h3>\n<ul>\n<li><strong>Frecven\u021be proprii:<\/strong> de obicei 50\u2013400 Hz, \u00een func\u021bie de dimensiune \u0219i de construc\u021bie.<\/li>\n<li><strong>Excita\u0163ie:<\/strong> 1\u00d7 (<a href=\"https:\/\/vibromera.eu\/ro\/glossary\/unbalance\/\">dezechilibru<\/a>), dublul frecven\u021bei re\u021belei (120 Hz la o alimentare de 60 Hz, 100 Hz la 50 Hz) \u0219i for\u021bele electromagnetice legate de <a href=\"https:\/\/vibromera.eu\/ro\/glossary\/electrical-frequency\/\">frecven\u021ba electric\u0103<\/a>.<\/li>\n<li><strong>Simptome:<\/strong> vibra\u021bia cadrului mult mai mare dec\u00e2t vibra\u021bia lag\u0103rului; un zumzet sau un b\u00e2z\u00e2it audibil.<\/li>\n<li><strong>Severitate:<\/strong> cadrul poate indica valori de 5\u201310\u00d7 mai mari dec\u00e2t lag\u0103rele.<\/li>\n<\/ul>\n<h3>Carcase de ventilatoare \u0219i suflante<\/h3>\n<ul>\n<li><strong>Frecven\u021be proprii:<\/strong> 20\u2013200 Hz pentru ventilatoarele industriale tipice.<\/li>\n<li><strong>Excita\u0163ie:<\/strong> <a href=\"https:\/\/vibromera.eu\/ro\/glossary\/blade-passing-frequency\/\">frecven\u021ba de trecere a paletei<\/a> (num\u0103rul de pale \u00d7 tura\u021bia).<\/li>\n<li><strong>Simptome:<\/strong> Panourile carcasei vibreaz\u0103 violent; zgomot aerodinamic puternic<\/li>\n<li><strong>Caracteristic\u0103:<\/strong> poate ap\u0103rea doar la anumite tura\u021bii sau condi\u021bii de debit.<\/li>\n<\/ul>\n<h3>Pump casings<\/h3>\n<ul>\n<li><strong>Frecven\u021be proprii:<\/strong> 30\u2013300 Hz, \u00een func\u021bie de proiectarea carcasei.<\/li>\n<li><strong>Excita\u0163ie:<\/strong> <a href=\"https:\/\/vibromera.eu\/ro\/glossary\/vane-passing-frequency\/\">frecven\u021ba de trecere a paletei<\/a> \u0219i pulsa\u021bii hidraulice.<\/li>\n<li><strong>Simptome:<\/strong> vibra\u021bia carcasei, zgomot \u0219i un risc de fisurare prin oboseal\u0103.<\/li>\n<li><strong>Cuplaj hidraulic:<\/strong> o carcas\u0103 umplut\u0103 cu fluid poate cupla vibra\u021bia rotorului cu cea a carcasei, complic\u00e2nd tabloul.<\/li>\n<\/ul>\n<h3>Carcase de reductoare<\/h3>\n<ul>\n<li>Excited by <a href=\"https:\/\/vibromera.eu\/ro\/glossary\/gear-mesh-frequency\/\">frecven\u021ba de angrenare<\/a>.<\/li>\n<li>Frecven\u021bele proprii ale cadrului se suprapun adesea cu frecven\u021ba de angrenare \u0219i cu armonicile acesteia.<\/li>\n<li>Produce un \u0219uierat caracteristic \u0219i puternic al angrenajului \u00een condi\u021bii de rezonan\u021b\u0103.<\/li>\n<\/ul>\n<h2>3. Semn\u0103tura vibra\u021biilor \u0219i detectarea<\/h2>\n<h3>Simptome caracteristice<\/h3>\n<ul>\n<li><strong>Dependent de pozi\u021bie:<\/strong> vibra\u021bia variaz\u0103 dramatic pe suprafa\u021ba cadrului \u2014 diferen\u021bele de 10\u00d7 \u00eentre puncte sunt frecvente.<\/li>\n<li><strong>Rulment vs. structur\u0103 portant\u0103:<\/strong> vibra\u021bia cadrului dep\u0103\u0219e\u0219te cu mult vibra\u021bia rulmentului (adesea de 3\u201310\u00d7).<\/li>\n<li><strong>Specific frecven\u021bei:<\/strong> problema apare numai la frecven\u021ba de rezonan\u021b\u0103; celelalte frecven\u021be par normale.<\/li>\n<li><strong>Sensibil la vitez\u0103:<\/strong> sever\u0103 \u00eentr-o band\u0103 \u00eengust\u0103 (\u00b110\u201320% din tura\u021bia de rezonan\u021b\u0103).<\/li>\n<li><strong>Visual motion:<\/strong> mi\u0219carea cadrului este adesea vizibil\u0103 cu ochiul liber.<\/li>\n<\/ul>\n<h3>Test de impact (bump)<\/h3>\n<p>Testul definitiv. Lovi\u021bi cadrul cu un ciocan de cauciuc sau cu un ciocan instrumentat, m\u0103sura\u021bi r\u0103spunsul cu un <a href=\"https:\/\/vibromera.eu\/ro\/glossary\/accelerometer\/\">accelerometru<\/a>, \u0219i citi\u021bi frecven\u021bele proprii ale cadrului din v\u00e2rfurile r\u0103spunsului \u00een frecven\u021b\u0103. Compararea acestor v\u00e2rfuri cu frecven\u021bele de func\u021bionare (1\u00d7, 2\u00d7, frecven\u021ba de trecere a paletelor \u0219i a\u0219a mai departe) dezv\u0103luie imediat orice coinciden\u021b\u0103 periculoas\u0103. Vezi <a href=\"https:\/\/vibromera.eu\/ro\/glossary\/bump-test\/\">testul cu impact<\/a> \u0219i <a href=\"https:\/\/vibromera.eu\/ro\/glossary\/impact-testing\/\">teste de impact<\/a> pentru procedura complet\u0103.<\/p>\n<h3>M\u0103surare itinerant\u0103 cu accelerometru<\/h3>\n<p>Cu ma\u0219ina \u00een func\u021biune, m\u0103sura\u021bi vibra\u021bia \u00een multe puncte de pe cadru \u0219i construi\u021bi o hart\u0103 a vibra\u021biilor cu zonele de amplitudine mare \u0219i mic\u0103. Tiparul dezv\u0103luie forma modului \u2014 \u00eencovoiere, r\u0103sucire sau flexarea panourilor \u2014 \u0219i localizeaz\u0103 antinodurile (mi\u0219care maxim\u0103) \u0219i nodurile (mi\u0219care minim\u0103). O <a href=\"https:\/\/vibromera.eu\/ro\/glossary\/ods-analysis\/\">analiza formei deflec\u021biei de func\u021bionare (ODS)<\/a> anim\u0103 aceast\u0103 mi\u0219care, iar <a href=\"https:\/\/vibromera.eu\/ro\/glossary\/modal-analysis\/\">analiz\u0103 modal\u0103<\/a> extrage modurile proprii subiacente.<\/p>\n<h3>M\u0103surarea func\u021biei de transfer<\/h3>\n<p>M\u0103sura\u021bi <a href=\"https:\/\/vibromera.eu\/ro\/glossary\/coherence\/\">coeren\u021b\u0103<\/a> \u00eentre vibra\u021bia lag\u0103rului (intrarea) \u0219i vibra\u021bia cadrului (ie\u0219irea). O coeren\u021b\u0103 ridicat\u0103 la o frecven\u021b\u0103 specific\u0103 confirm\u0103 c\u0103 mi\u0219carea cadrului este antrenat\u0103 de for\u021barea rotorului \u0219i intr\u0103 \u00een rezonan\u021b\u0103 cu aceasta. \u00censu\u0219i <a href=\"https:\/\/vibromera.eu\/ro\/glossary\/transfer-function\/\">func\u021bie de transfer<\/a> cuantific\u0103 factorul de amplificare.<\/p>\n<h2>4. Confirmarea rezonan\u021bei \u00een teren<\/h2>\n<p>\u00cenainte ca orice structur\u0103 s\u0103 fie rigidizat\u0103 sau orice rotor s\u0103 fie atins, diagnosticul trebuie confirmat \u2014 iar aceasta \u00eenseamn\u0103 m\u0103surarea comportamentului real al rotorului separat de cel al cadrului. Un analizor portabil cu dou\u0103 canale, cum ar fi <a href=\"https:\/\/vibromera.eu\/ro\/produs\/balanset-1\/\">Balanset-1A<\/a> face acest lucru simplu: un analist poate capta <a href=\"https:\/\/vibromera.eu\/ro\/glossary\/phase\/\">amplitudine \u0219i faz\u0103<\/a> \u0219i spectrul complet la carcasa lag\u0103rului, apoi poate muta senzorul pe panoul suspect \u0219i poate urm\u0103ri cre\u0219terea nivelului la frecven\u021ba de rezonan\u021b\u0103 \u00een timp ce faza se deplaseaz\u0103 prin modul structural. Dac\u0103 vibra\u021bia 1\u00d7 a rotorului este modest\u0103 la lag\u0103r, dar enorm\u0103 pe cadru, verdictul este rezonan\u021b\u0103, nu dezechilibru. Acela\u0219i instrument v\u0103 permite s\u0103 efectua\u021bi o echilibrare de prob\u0103 a rotorului pentru a confirma sau exclude dezechilibrul \u0219i s\u0103 rula\u021bi o oprire prin iner\u021bie astfel \u00eenc\u00e2t v\u00e2rful de rezonan\u021b\u0103 s\u0103 apar\u0103 pe m\u0103sur\u0103 ce tura\u021bia trece prin el.<\/p>\n<h2>5. Solu\u021bii \u0219i m\u0103suri de atenuare<\/h2>\n<h3>Modific\u0103ri de rigidizare<\/h3>\n<ul>\n<li><strong>Ad\u0103uga\u021bi nervuri sau gusee structurale:<\/strong> cre\u0219te rigiditatea la \u00eencovoiere, ridic\u0103 frecven\u021ba proprie peste domeniul de excita\u021bie, este economic\u0103 \u0219i poate fi montat\u0103 ulterior pe echipamentele existente.<\/li>\n<li><strong>M\u0103ri\u021bi grosimea materialului:<\/strong> \u00eengro\u0219area pere\u021bilor sau a panourilor cadrului cre\u0219te semnificativ rigiditatea \u0219i frecven\u021ba, de\u0219i poate necesita noi piese turnate sau confec\u021bionate.<\/li>\n<li><strong>Leg\u0103turi structurale \u0219i contrav\u00e2ntuiri:<\/strong> conectarea laturilor opuse ale cadrului previne flexarea; contrav\u00e2ntuirea \u00eencruci\u0219at\u0103 adaug\u0103 rigiditate torsional\u0103 \u0219i poate fi adesea montat\u0103 exterior.<\/li>\n<\/ul>\n<h3>Mass addition<\/h3>\n<ul>\n<li><strong>Cobor\u00e2rea frecven\u021bei proprii:<\/strong> ad\u0103uga\u021bi mas\u0103 pentru a cobor\u00ee frecven\u021ba sub domeniul de excita\u021bie.<\/li>\n<li><strong>Amplasare strategic\u0103:<\/strong> ad\u0103uga\u021bi mas\u0103 \u00een zonele ventrelor pentru un efect maxim.<\/li>\n<li><strong>Tuned mass:<\/strong> o mas\u0103 calculat\u0103 cu aten\u021bie deplaseaz\u0103 un mod problematic specific.<\/li>\n<li><strong>Compromis:<\/strong> greutatea suplimentar\u0103 nu este de dorit \u00een orice aplica\u021bie.<\/li>\n<\/ul>\n<p>Indiferent dac\u0103 alege\u021bi s\u0103 cre\u0219te\u021bi sau s\u0103 sc\u0103de\u021bi frecven\u021ba, un calcul rapid v\u0103 \u021bine \u00een afara urm\u0103toarei benzi de rezonan\u021b\u0103. Un <a href=\"https:\/\/vibromera.eu\/ro\/calculators\/foundation-natural-frequency\/\">calculator al frecven\u021bei naturale a funda\u021biei<\/a> \u0219i o <a href=\"https:\/\/vibromera.eu\/ro\/calculators\/damping-ratio-calculator\/\">calculator al raportului de amortizare<\/a> v\u0103 ajut\u0103 s\u0103 estima\u021bi unde va ajunge o structur\u0103 modificat\u0103 \u00eenainte de a t\u0103ia vreun metal.<\/p>\n<h3>Tratamente de amortizare<\/h3>\n<ul>\n<li><strong>Amortizarea cu strat constr\u00e2ns:<\/strong> un strat v\u00e2scoelastic intercalat \u00eentre straturi metalice, aplicat pe panouri plane mari \u0219i capace. Reduce v\u00e2rful de rezonan\u021b\u0103 cu 50\u201380% \u0219i func\u021bioneaz\u0103 bine pe aproximativ 20\u2013500 Hz.<\/li>\n<li><strong>Amortizare cu strat liber:<\/strong> material de amortizare lipit direct pe suprafa\u021ba vibrant\u0103 \u2014 mai simplu dec\u00e2t stratul constr\u00e2ns, dar mai pu\u021bin eficient, util acolo unde accesul este limitat.<\/li>\n<\/ul>\n<h3>Modific\u0103ri opera\u021bionale<\/h3>\n<ul>\n<li><strong>Modificarea vitezei:<\/strong> func\u021biona\u021bi la o tura\u021bie la care rezonan\u021ba nu apare.<\/li>\n<li><strong>Reduce\u021bi for\u021barea:<\/strong> improve <a href=\"https:\/\/vibromera.eu\/ro\/glossary\/echilibrare\/\">echilibrare<\/a> \u0219i <a href=\"https:\/\/vibromera.eu\/ro\/glossary\/misalignment\/\">aliniere<\/a> pentru a reduce amplitudinea excita\u021biei care alimenteaz\u0103 rezonan\u021ba.<\/li>\n<li><strong>Modific\u0103ri ale procesului:<\/strong> Modificarea debitului, presiunii sau sarcinii pentru a schimba frecven\u021bele de excita\u021bie<\/li>\n<\/ul>\n<h2>6. Prevenirea \u00eenc\u0103 din faza de proiectare<\/h2>\n<h3>Principii de proiectare<\/h3>\n<ul>\n<li><strong>Rigiditate adecvat\u0103:<\/strong> proiecta\u021bi cadrul astfel \u00eenc\u00e2t frecven\u021bele sale proprii s\u0103 se situeze peste 2\u00d7 cea mai mare frecven\u021b\u0103 de excita\u021bie.<\/li>\n<li><strong>Distribu\u021bia \u00een mas\u0103:<\/strong> evita\u021bi masele concentrate care creeaz\u0103 moduri de joas\u0103 frecven\u021b\u0103.<\/li>\n<li><strong>Nervuri \u0219i ranforsare:<\/strong> integra\u021bi elemente de rigidizare \u00eenc\u0103 de la \u00eenceput.<\/li>\n<li><strong>Analiz\u0103 modal\u0103:<\/strong> utiliza\u021bi FEA \u00een timpul proiect\u0103rii pentru a prezice \u0219i optimiza frecven\u021bele proprii.<\/li>\n<\/ul>\n<h3>Verificarea proiect\u0103rii<\/h3>\n<ul>\n<li>Testarea prototipului cu analiz\u0103 de impact.<\/li>\n<li>M\u0103surarea formei deforma\u021biei \u00een regim de func\u021bionare pe primele unit\u0103\u021bi construite.<\/li>\n<li>Revizui\u021bi proiectul \u00eenainte de produc\u021bie dac\u0103 se constat\u0103 rezonan\u021be.<\/li>\n<\/ul>\n<h2>7. Exemplu de caz<\/h2>\n<p><strong>Situa\u0163ie:<\/strong> un motor de 75 HP care antreneaz\u0103 un ventilator centrifugal, cu zgomot \u0219i vibra\u021bii excesive.<\/p>\n<ul>\n<li><strong>Simptome:<\/strong> vibra\u021bia carcasei motorului de 12 mm\/s; vibra\u021bia lag\u0103rului de doar 2,5 mm\/s.<\/li>\n<li><strong>Frecven\u0163\u0103:<\/strong> 120 Hz (de 2\u00d7 frecven\u021ba re\u021belei la o alimentare de 60 Hz).<\/li>\n<li><strong>Impact test:<\/strong> a relevat o frecven\u021b\u0103 natural\u0103 a carcasei la 118 Hz \u2014 aproape exact la frecven\u021ba de excita\u021bie.<\/li>\n<li><strong>Cauza de baz\u0103:<\/strong> carcasa intra \u00een rezonan\u021b\u0103 la frecven\u021ba de excita\u021bie electromagnetic\u0103.<\/li>\n<li><strong>Solu\u021bie:<\/strong> au fost ad\u0103ugate patru gusee din corniere, care leag\u0103 t\u0103lpile motorului de scuturile capac.<\/li>\n<li><strong>Rezultat:<\/strong> frecven\u021ba natural\u0103 a carcasei s-a deplasat la 165 Hz, iar vibra\u021bia a sc\u0103zut la 3,2 mm\/s \u2014 revenind confortabil \u00een intervalul acceptabil conform <a href=\"https:\/\/vibromera.eu\/ro\/glossary\/iso-20816-3\/\">ISO 20816-3<\/a> (succesorul modern al ISO 10816-3).<\/li>\n<li><strong>Cost:<\/strong> aproximativ 200 USD \u00een materiale, fa\u021b\u0103 de circa 8.000 USD pentru \u00eenlocuirea unui motor.<\/li>\n<\/ul>\n<p>Rezonan\u021ba carcasei este o problem\u0103 de vibra\u021bii frecvent\u0103, dar adesea diagnosticat\u0103 gre\u0219it. Recunoa\u0219terea simptomelor revelatoare \u2014 vibra\u021bie ridicat\u0103 a carcasei fa\u021b\u0103 de vibra\u021bia lag\u0103rului, puternic specific\u0103 unei anumite frecven\u021be, puternic dependent\u0103 de pozi\u021bie \u2014 \u0219i aplicarea tehnicilor de diagnosticare corecte (testarea la impact \u0219i analiza ODS) conduc la solu\u021bii \u021bintite care pot reduce drastic vibra\u021bia la un cost foarte modest.<\/p>\n<hr>\n<p><a href=\"https:\/\/vibromera.eu\/ro\/glossary\/\">\u2190 \u00cenapoi la indexul principal<\/a><\/p>","protected":false},"excerpt":{"rendered":"<p>Afla\u021bi despre rezonan\u021ba cadrului, amplificarea vibra\u021biilor atunci c\u00e2nd cadrele, carcasele sau carcase ale ma\u0219inilor rezoneaz\u0103 la frecven\u021bele de func\u021bionare, provoc\u00e2nd zgomot excesiv \u0219i solicit\u0103ri structurale.<\/p>","protected":false},"featured_media":0,"template":"","meta":{"ai_generated_summary":"","footnotes":""},"categories":[109,110],"tags":[],"class_list":["post-125","glossary","type-glossary","status-publish","hentry","category-glossary","category-vibration-diagnostics"],"_links":{"self":[{"href":"https:\/\/vibromera.eu\/ro\/wp-json\/wp\/v2\/glossary\/125","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/vibromera.eu\/ro\/wp-json\/wp\/v2\/glossary"}],"about":[{"href":"https:\/\/vibromera.eu\/ro\/wp-json\/wp\/v2\/types\/glossary"}],"version-history":[{"count":1,"href":"https:\/\/vibromera.eu\/ro\/wp-json\/wp\/v2\/glossary\/125\/revisions"}],"predecessor-version":[{"id":101384,"href":"https:\/\/vibromera.eu\/ro\/wp-json\/wp\/v2\/glossary\/125\/revisions\/101384"}],"wp:attachment":[{"href":"https:\/\/vibromera.eu\/ro\/wp-json\/wp\/v2\/media?parent=125"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/vibromera.eu\/ro\/wp-json\/wp\/v2\/categories?post=125"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/vibromera.eu\/ro\/wp-json\/wp\/v2\/tags?post=125"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}