{"id":173,"date":"2025-10-31T00:25:51","date_gmt":"2025-10-31T00:25:51","guid":{"rendered":"https:\/\/vibromera.eu\/glossary\/nodal-point\/"},"modified":"2026-07-03T10:09:35","modified_gmt":"2026-07-03T10:09:35","slug":"nodal-point","status":"publish","type":"glossary","link":"https:\/\/vibromera.eu\/ro\/glossary\/nodal-point\/","title":{"rendered":"Ce este un punct nodal \u00een vibra\u021bia rotorului?"},"content":{"rendered":"<h1>\u00cen\u021belegerea punctelor nodale \u00een vibra\u021biile rotorului<\/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\/173?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\/173?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\/173?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\/173?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\/173?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\/173?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\/173?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\/173?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, 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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\/173?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\" 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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\/173?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\/173?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\/173?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\/173?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>A <strong>punct nodal<\/strong> \u2014 denumit\u0103 \u0219i nod sau linie nodal\u0103 atunci c\u00e2nd mi\u0219carea este privit\u0103 \u00een trei dimensiuni \u2014 este o loca\u021bie specific\u0103 de-a lungul unui arbore care vibreaz\u0103 <a href=\"https:\/\/vibromera.eu\/ro\/glossary\/rotor\/\">rotor<\/a> unde <a href=\"https:\/\/vibromera.eu\/ro\/glossary\/displacement\/\">deplasare<\/a> r\u0103m\u00e2ne egal cu zero \u00een timp ce rotorul vibreaz\u0103 la o frecven\u021b\u0103 anume <a href=\"https:\/\/vibromera.eu\/ro\/glossary\/natural-frequency\/\">frecven\u021b\u0103 natural\u0103<\/a>. Chiar \u0219i atunci c\u00e2nd restul arborelui se \u00eendoaie \u0219i se curbeaz\u0103 \u00een timpul mi\u0219c\u0103rii sale, punctul nodal r\u0103m\u00e2ne fix \u00een raport cu pozi\u021bia neutr\u0103 a arborelui. Punctele nodale sunt caracteristici fundamentale ale <a href=\"https:\/\/vibromera.eu\/ro\/glossary\/mode-shape\/\">forme de mod<\/a>, iar cunoa\u0219terea locului \u00een care se \u00eencadreaz\u0103 este decisiv\u0103 pentru <a href=\"https:\/\/vibromera.eu\/ro\/glossary\/rotor-dynamics\/\">dinamica rotorului<\/a> analiz\u0103, pentru <a href=\"https:\/\/vibromera.eu\/ro\/glossary\/echilibrare\/\">echilibrare<\/a> strategie \u0219i pentru a decide unde s\u0103 se monteze senzorii de vibra\u021bii. Dac\u0103 nu le \u00een\u021belegi corect, reglarea echilibrului e\u0219ueaz\u0103 sau sistemul de monitorizare nu mai detecteaz\u0103 vibra\u021biile reale; dac\u0103 le \u00een\u021belegi, ambele devin simple.<\/p>\n<h2>1. Punctele nodale \u00een diferite moduri de vibra\u021bie<\/h2>\n<p>Fiecare mod al unui ax are propriul s\u0103u model de noduri \u0219i antinoduri, care devine tot mai complex pe m\u0103sur\u0103 ce num\u0103rul modului cre\u0219te.<\/p>\n<h3>Primul mod de \u00eendoire<\/h3>\n<p>Primul mod de \u00eencovoiere (fundamental) are de obicei:<\/p>\n<ul>\n<li><strong>zero noduri interne<\/strong> \u2014 nu exist\u0103 niciun punct de deviere zero de-a lungul lungimii axului;<\/li>\n<li><strong>pozi\u021biile rulmen\u021bilor ca noduri aproximative<\/strong> \u2014 \u00eentr-o structur\u0103 cu sus\u021binere simpl\u0103, lag\u0103rele ac\u021bioneaz\u0103 ca puncte aproape nodale;<\/li>\n<li><strong>deformare maxim\u0103<\/strong> aproape de mijlocul deschiderii, \u00eentre lag\u0103re; \u0219i<\/li>\n<li><strong>o form\u0103 simpl\u0103 de arc<\/strong> \u2014 axul se curbeaz\u0103 \u00eentr-o singur\u0103 curb\u0103 lin\u0103.<\/li>\n<\/ul>\n<h3>Al doilea mod de \u00eendoire<\/h3>\n<p>Al doilea mod are un model mai complex:<\/p>\n<ul>\n<li><strong>un nod intern<\/strong> \u2014 un singur punct, de obicei situat \u00een apropierea punctului median al deschiderii, \u00een care deforma\u021bia este egal\u0103 cu zero;<\/li>\n<li><strong>o form\u0103 de curb\u0103 \u00een S<\/strong> \u2014 axul se curbeaz\u0103 \u00een direc\u021bii opuse de o parte \u0219i de alta a nodului;<\/li>\n<li><strong>two antinodes<\/strong> \u2014 deforma\u021bia maxim\u0103 pe fiecare parte a nodului; \u0219i<\/li>\n<li><strong>o frecven\u021b\u0103 mai mare<\/strong> \u2014 frecven\u021ba sa natural\u0103 este cu mult peste cea a primului mod.<\/li>\n<\/ul>\n<h3>Al treilea mod \u0219i superior<\/h3>\n<ul>\n<li><strong>third mode:<\/strong> dou\u0103 noduri interne \u0219i trei antinoduri;<\/li>\n<li><strong>al patrulea mod:<\/strong> trei noduri \u0219i patru antinoduri;<\/li>\n<li><strong>regul\u0103 general\u0103:<\/strong> modul N are (N \u2212 1) puncte nodale interne; \u0219i<\/li>\n<li><strong>complexitate cresc\u00e2nd\u0103:<\/strong> modurile superioare prezint\u0103 modele de und\u0103 din ce \u00een ce mai complexe.<\/li>\n<\/ul>\n<h2>2. Importan\u021ba fizic\u0103 a punctelor nodale<\/h2>\n<h3>Deformare zero \u2014 dar solicitare maxim\u0103<\/h3>\n<p>\u00centr-un punct nodal, \u00een timpul vibra\u021biei la frecven\u021ba natural\u0103 a acelui mod:<\/p>\n<ul>\n<li>deplasarea lateral\u0103 este zero, iar arborele trece prin axa sa neutr\u0103;<\/li>\n<li>totu\u0219i, tensiunea de \u00eencovoiere atinge de obicei valoarea maxim\u0103, deoarece panta curbei de deformare este cea mai abrupt\u0103 \u00een acel punct; \u0219i<\/li>\n<li>for\u021bele de forfecare sunt, de asemenea, cele mai mari la nod.<\/li>\n<\/ul>\n<p>Aceast\u0103 combina\u021bie contraintuitiv\u0103 \u2014 mi\u0219care minim\u0103, solicitare maxim\u0103 \u2014 explic\u0103 de ce un nod poate fi un punct de sprijin excelent, dar un loc nepotrivit pentru a evalua starea rotorului doar pe baza mi\u0219c\u0103rii.<\/p>\n<h3>Sensibilitate zero<\/h3>\n<p>O for\u021b\u0103 sau o mas\u0103 aplicat\u0103 \u00eentr-un punct nodal are un efect minim asupra acelui mod specific:<\/p>\n<ul>\n<li>adding <a href=\"https:\/\/vibromera.eu\/ro\/glossary\/correction-weight\/\">ponderi de corec\u021bie<\/a> la un nod nu contribuie prea mult la echilibrarea acelui mod;<\/li>\n<li>senzorii amplasa\u021bi la un nod detecteaz\u0103 vibra\u021bii minime pentru acel mod; \u0219i<\/li>\n<li>un sprijin sau o constr\u00e2ngere la un nod abia dac\u0103 modific\u0103 frecven\u021ba natural\u0103 a modului.<\/li>\n<\/ul>\n<h2>3. Implica\u021bii practice pentru echilibrare<\/h2>\n<h3>Selectarea planului de corec\u021bie<\/h3>\n<p>Cunoa\u0219terea pozi\u021biei nodurilor determin\u0103 \u00eentreaga strategie de echilibrare, aceasta diferind semnificativ \u00een cazul rotoarelor rigide fa\u021b\u0103 de cele flexibile.<\/p>\n<h4>Pentru rotoare rigide<\/h4>\n<ul>\n<li>acestea func\u021bioneaz\u0103 sub prima vitez\u0103 critic\u0103;<\/li>\n<li>primul mod nu este excitat \u00een mod semnificativ;<\/li>\n<li>standard <a href=\"https:\/\/vibromera.eu\/ro\/glossary\/two-plane-balancing\/\">echilibrare pe dou\u0103 planuri<\/a> \u00een apropierea capetelor rotorului este eficient\u0103; \u0219i<\/li>\n<li>punctele nodale nu reprezint\u0103 o preocupare principal\u0103.<\/li>\n<\/ul>\n<h4>Pentru rotoare flexibile<\/h4>\n<ul>\n<li>func\u021bioneaz\u0103 prin sau peste vitezele critice;<\/li>\n<li>trebuie s\u0103 se \u021bin\u0103 seama de formele modale \u0219i de punctele nodale;<\/li>\n<li><strong>effective <a href=\"https:\/\/vibromera.eu\/ro\/glossary\/correction-plane\/\">planuri de corec\u021bie<\/a><\/strong> s\u0103 se afle la antinoduri sau \u00een apropierea acestora \u2014 punctele de deviere maxim\u0103;<\/li>\n<li><strong>loca\u021bii ineficiente<\/strong> sunt planuri de corec\u021bie situate la un nod sau \u00een apropierea acestuia, care influen\u021beaz\u0103 foarte pu\u021bin acel mod; \u0219i<\/li>\n<li><strong><a href=\"https:\/\/vibromera.eu\/ro\/glossary\/modal-balancing\/\">echilibrare modal\u0103<\/a><\/strong> Ia \u00een considerare \u00een mod explicit loca\u021biile punctelor nodale la distribuirea ponderilor de corec\u021bie<\/li>\n<\/ul>\n<h3>Exemplu: Echilibrarea \u00een modul secundar<\/h3>\n<p>S\u0103 lu\u0103m \u00een considerare un arbore lung \u0219i flexibil care func\u021bioneaz\u0103 la o vitez\u0103 mai mare dec\u00e2t prima sa vitez\u0103 critic\u0103, provoc\u00e2nd rezonan\u021ba \u00een al doilea mod:<\/p>\n<ul>\n<li>al doilea mod are un punct nodal situat aproape de mijlocul deschiderii;<\/li>\n<li>plasarea \u00eentregii greut\u0103\u021bi de corec\u021bie \u00een apropierea punctului central al deschiderii \u2014 la nod \u2014 ar fi ineficient\u0103;<\/li>\n<li>strategia optim\u0103 const\u0103 \u00een plasarea corec\u021biilor la cele dou\u0103 antinoduri, c\u00e2te una de fiecare parte a nodului; \u0219i<\/li>\n<li>Pentru ca echilibrarea s\u0103 func\u021bioneze, distribu\u021bia greut\u0103\u021bii trebuie s\u0103 corespund\u0103 cu a doua form\u0103 modal\u0103.<\/li>\n<\/ul>\n<h2>4. Aspecte legate de amplasarea senzorilor<\/h2>\n<h3>Strategia de m\u0103surare a vibra\u021biilor<\/h3>\n<p>Punctele nodale au un efect decisiv asupra <a href=\"https:\/\/vibromera.eu\/ro\/glossary\/vibration-monitoring\/\">monitorizarea vibra\u021biilor<\/a>.<\/p>\n<h4>Evita\u021bi loca\u021biile nodale<\/h4>\n<ul>\n<li>un senzor de la un nod detecteaz\u0103 o vibra\u021bie minim\u0103 pentru acel mod;<\/li>\n<li>poate omite o problem\u0103 grav\u0103 legat\u0103 de vibra\u021bii dac\u0103 acesta este singurul punct de m\u0103surare; \u0219i<\/li>\n<li>Poate crea o impresie fals\u0103 despre nivelurile acceptabile de vibra\u021bii<\/li>\n<\/ul>\n<h4>Loca\u021biile antinodurilor \u021bint\u0103<\/h4>\n<ul>\n<li>antinodurile indic\u0103 amplitudinea maxim\u0103 a vibra\u021biei;<\/li>\n<li>ei sunt cei mai sensibili la o problem\u0103 care se contureaz\u0103;<\/li>\n<li>pentru primul mod al unui rotor simplu rezemat, antinodul se afl\u0103 aproape de mijlocul deschiderii (lag\u0103rele sunt aproape de noduri); \u00een practic\u0103, monitorizarea ma\u0219inilor m\u0103soar\u0103 totu\u0219i de obicei la carcasele lag\u0103relor, deoarece acestea sunt punctele de montaj accesibile \u0219i standard; \u0219i<\/li>\n<li>pentru modurile superioare, pot fi necesare puncte de m\u0103surare intermediare.<\/li>\n<\/ul>\n<h4>Puncte multiple de m\u0103surare<\/h4>\n<ul>\n<li>Pentru rotoarele flexibile, m\u0103sura\u021bi \u00een mai multe pozi\u021bii axiale<\/li>\n<li>astfel se asigur\u0103 c\u0103 niciun mod nu este omis din cauza faptului c\u0103 un senzor s-a a\u0219ezat \u00eent\u00e2mpl\u0103tor pe un nod;<\/li>\n<li>permite determinarea experimental\u0103 a formelor modale; \u0219i<\/li>\n<li><a href=\"https:\/\/vibromera.eu\/ro\/glossary\/critical-machinery\/\">echipamente esen\u021biale<\/a> este prev\u0103zut adesea cu senzori la fiecare lag\u0103r, precum \u0219i la jum\u0103tatea lungimii.<\/li>\n<\/ul>\n<h2>5. Stabilirea pozi\u021biilor punctelor nodale<\/h2>\n<h3>Predic\u021bie analitic\u0103<\/h3>\n<ul>\n<li><strong><a href=\"https:\/\/vibromera.eu\/ro\/glossary\/modal-analysis\/\">Analiza cu elemente finite<\/a>:<\/strong> calculeaz\u0103 formele modale \u0219i identific\u0103 nodurile.<\/li>\n<li><strong>Teoria grinzii:<\/strong> \u00een cazul configura\u021biilor simple, solu\u021biile de form\u0103 \u00eenchis\u0103 prezic pozi\u021biile nodurilor.<\/li>\n<li><strong>Design tools:<\/strong> Software-ul de dinamic\u0103 a rotorului afi\u0219eaz\u0103 vizual fiecare form\u0103 de mod, cu nodurile marcate.<\/li>\n<\/ul>\n<h3>Identificare experimental\u0103<\/h3>\n<p><strong>1. Testarea rezisten\u021bei la impact (la lovire)<\/strong> \u2014 se love\u0219te arborele \u00een mai multe locuri cu un ciocan echipat cu senzori \u0219i se m\u0103soar\u0103 r\u0103spunsul \u00een numeroase puncte; un loc care nu prezint\u0103 niciun r\u0103spuns la o frecven\u021b\u0103 dat\u0103 este un punct nodal pentru acel mod. Tehnica este descris\u0103 \u00een detaliu la <a href=\"https:\/\/vibromera.eu\/ro\/glossary\/bump-test\/\">bump testing<\/a> \u0219i <a href=\"https:\/\/vibromera.eu\/ro\/glossary\/impact-testing\/\">teste de impact<\/a>.<\/p>\n<p><strong>2. M\u0103surarea formei de deformare \u00een timpul func\u021bion\u0103rii<\/strong> \u2014 \u00een timpul func\u021bion\u0103rii \u00een apropierea unei viteze critice, se m\u0103soar\u0103 vibra\u021biile \u00een mai multe puncte axiale, se reprezint\u0103 grafic amplitudinea deforma\u021biei \u00een func\u021bie de pozi\u021bie \u0219i se identific\u0103 punctele de trecere prin zero ca fiind loca\u021biile nodale. Aceasta este esen\u021ba <a href=\"https:\/\/vibromera.eu\/ro\/glossary\/ods-analysis\/\">analiza formei de deformare \u00een timpul func\u021bion\u0103rii<\/a>.<\/p>\n<p><strong>3. Re\u021bele de sonde de proximitate<\/strong> \u2014 instala\u021bi mai multe dispozitive f\u0103r\u0103 contact <a href=\"https:\/\/vibromera.eu\/ro\/glossary\/proximity-probe\/\">sonde de proximitate<\/a> de-a lungul arborelui \u0219i m\u0103sura\u021bi deformarea direct \u00een timpul pornirii sau <a href=\"https:\/\/vibromera.eu\/ro\/glossary\/coastdown\/\">decelerare libera<\/a>; aceasta este cea mai precis\u0103 metod\u0103 experimental\u0103 de identificare a nodurilor.<\/p>\n<h2>6. Puncte nodale vs. antinoduri<\/h2>\n<p>Nodurile \u0219i antinodurile sunt dou\u0103 jum\u0103t\u0103\u021bi complementare ale aceleia\u0219i imagini.<\/p>\n<table>\n<tr>\n<th>Puncte nodale<\/th>\n<th>Antinoduri<\/th>\n<\/tr>\n<tr>\n<td>Deformare zero<\/td>\n<td>Deformare maxim\u0103<\/td>\n<\/tr>\n<tr>\n<td>Panta \u0219i tensiunea maxim\u0103 de \u00eencovoiere<\/td>\n<td>Pant\u0103 zero de \u00eendoire<\/td>\n<\/tr>\n<tr>\n<td>Eficacitate sc\u0103zut\u0103 pentru aplicarea sau m\u0103surarea for\u021bei<\/td>\n<td>Eficien\u021b\u0103 maxim\u0103 pentru greut\u0103\u021bile de corec\u021bie<\/td>\n<\/tr>\n<tr>\n<td>Ideal pentru puncte de sprijin (reduce la minimum for\u021ba transmis\u0103)<\/td>\n<td>Loca\u021bii optime pentru amplasarea senzorilor<\/td>\n<\/tr>\n<tr>\n<td>\u2014<\/td>\n<td>Solicitarea maxim\u0103 \u00een condi\u021bii de \u00eenc\u0103rcare combinat\u0103<\/td>\n<\/tr>\n<\/table>\n<h2>7. Aplica\u021bii practice \u0219i studii de caz<\/h2>\n<h3>Caz: Rol\u0103 pentru ma\u0219ina de fabricat h\u00e2rtie<\/h3>\n<ul>\n<li><strong>Situa\u0163ie:<\/strong> o rol\u0103 lung\u0103 (6 metri) care func\u021bioneaz\u0103 la 1.200 rpm \u0219i produce vibra\u021bii puternice.<\/li>\n<li><strong>Analiz\u0103:<\/strong> func\u021biona la o vitez\u0103 superioar\u0103 primei viteze critice, provoc\u00e2nd apari\u021bia celui de-al doilea mod de vibra\u021bie, cu un nod la jum\u0103tatea deschiderii.<\/li>\n<li><strong>Prima \u00eencercare:<\/strong> Au fost ad\u0103ugate greut\u0103\u021bi la mijlocul deschiderii \u2014 punctul de acces cel mai accesibil \u2014, dar rezultatele au fost nesatisf\u0103c\u0103toare.<\/li>\n<li><strong>Solu\u021bie:<\/strong> Recunosc\u00e2nd c\u0103 punctul de mijloc al deschiderii era punctul nodal, greut\u0103\u021bile au fost redistribuite c\u0103tre punctele de sfert (antinodurile).<\/li>\n<li><strong>Rezultat:<\/strong> vibra\u021biile au sc\u0103zut cu 85%, ceea ce reprezint\u0103 un echilibru modal reu\u0219it.<\/li>\n<\/ul>\n<h3>Caz: Monitorizarea turbinelor cu abur<\/h3>\n<ul>\n<li><strong>Situa\u0163ie:<\/strong> un nou sistem de monitorizare a indicat un nivel redus de vibra\u021bii, \u00een ciuda unui dezechilibru cunoscut.<\/li>\n<li><strong>Investiga\u021bie:<\/strong> senzorul fusese amplasat din gre\u0219eal\u0103 \u00een apropierea punctului nodal al modului dominant.<\/li>\n<li><strong>Solu\u021bie:<\/strong> Senzorii suplimentari amplasa\u021bi \u00een punctele de antinod au scos la iveal\u0103 nivelurile reale de vibra\u021bie.<\/li>\n<li><strong>Lec\u021bie:<\/strong> Lua\u021bi \u00eentotdeauna \u00een considerare modurile de vibra\u021bie atunci c\u00e2nd proiecta\u021bi un sistem de monitorizare.<\/li>\n<\/ul>\n<h2>8. Aspecte avansate<\/h2>\n<h3>Noduri mobile<\/h3>\n<p>\u00cen unele sisteme, punctele nodale se modific\u0103 \u00een func\u021bie de condi\u021biile de func\u021bionare:<\/p>\n<ul>\n<li>rigiditatea rulmentului, care depinde de vitez\u0103, determin\u0103 deplasarea pozi\u021biilor nodurilor;<\/li>\n<li>temperatura influen\u021beaz\u0103 rigiditatea arborelui;<\/li>\n<li>r\u0103spunsul poate depinde de sarcin\u0103; \u0219i<\/li>\n<li>Sistemele asimetrice pot avea noduri diferite pentru mi\u0219carea orizontal\u0103 \u0219i cea vertical\u0103.<\/li>\n<\/ul>\n<h3>Noduri aproximative vs. noduri adev\u0103rate<\/h3>\n<ul>\n<li><strong>True nodes:<\/strong> punctele de deviere zero exact\u0103 \u00eentr-un sistem idealizat.<\/li>\n<li><strong>Noduri aproximative:<\/strong> punctele cu o deformare foarte mic\u0103 \u2014 dar nu chiar zero \u2014 \u00eentr-un sistem real cu <a href=\"https:\/\/vibromera.eu\/ro\/glossary\/damping\/\">amortizare<\/a> \u0219i alte efecte neideale.<\/li>\n<li><strong>Consecin\u021b\u0103 practic\u0103:<\/strong> un nod real este un <em>region<\/em> cu o deviere redus\u0103, mai degrab\u0103 dec\u00e2t un punct matematic exact.<\/li>\n<\/ul>\n<h2>9. Punerea \u00een practic\u0103 pe teren<\/h2>\n<p>\u00cen cazul rotoarelor rigide care alc\u0103tuiesc majoritatea utilajelor industriale \u2014 pompe, ventilatoare, motoare \u0219i altele asemenea \u2014 regula de func\u021bionare este lini\u0219titor de simpl\u0103: dac\u0103 se men\u021bine viteza sub prima vitez\u0103 critic\u0103, nu apar niciodat\u0103 punctele de flexiune problematice, astfel \u00eenc\u00e2t dou\u0103 planuri de corec\u021bie amplasate \u00een apropierea capetelor rotorului sunt suficiente. Un analizor portabil cu dou\u0103 canale, precum <a href=\"https:\/\/vibromera.eu\/ro\/produs\/balanset-1\/\">Balanset-1A<\/a> realizeaz\u0103 exact acea func\u021bie pe un singur plan sau pe dou\u0103 planuri <a href=\"https:\/\/vibromera.eu\/ro\/glossary\/echilibrarea-campului\/\">echilibrarea la fa\u021ba locului<\/a> \u00een rulmen\u021bii proprii ai ma\u0219inii, m\u0103sur\u00e2nd amplitudinea \u0219i <a href=\"https:\/\/vibromera.eu\/ro\/glossary\/phase\/\">faz\u0103<\/a> pentru a calcula greut\u0103\u021bile de corec\u021bie. Atunci c\u00e2nd un rotor trebuie s\u0103 func\u021bioneze la sau peste o vitez\u0103 critic\u0103, acelea\u0219i date privind amplitudinea \u0219i faza, \u00eenregistrate \u00een mai multe puncte axiale, permit analistului s\u0103 reprezinte grafic forma modului de vibra\u021bie \u0219i s\u0103 confirme care plan este un antinod \u00eenainte de a se aplica vreo greutate de corec\u021bie \u2014 diferen\u021ba dintre o \u00eembun\u0103t\u0103\u021bire de 85% \u0219i o \u00eencercare e\u0219uat\u0103. Pe scurt, \u00een\u021belegerea punctelor nodale este ceea ce transform\u0103 datele privind vibra\u021biile \u00eentr-o decizie corect\u0103 de echilibrare.<\/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 punctele nodale, loca\u021bii pe un arbore vibrant unde deforma\u021bia r\u0103m\u00e2ne zero, esen\u021biale pentru \u00een\u021belegerea formelor modurilor, echilibrarea \u0219i plasarea senzorilor \u00een ma\u0219inile rotative.<\/p>","protected":false},"featured_media":0,"template":"","meta":{"ai_generated_summary":"","footnotes":""},"categories":[109,111],"tags":[],"class_list":["post-173","glossary","type-glossary","status-publish","hentry","category-glossary","category-rotor-balancing"],"_links":{"self":[{"href":"https:\/\/vibromera.eu\/ro\/wp-json\/wp\/v2\/glossary\/173","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":2,"href":"https:\/\/vibromera.eu\/ro\/wp-json\/wp\/v2\/glossary\/173\/revisions"}],"predecessor-version":[{"id":102180,"href":"https:\/\/vibromera.eu\/ro\/wp-json\/wp\/v2\/glossary\/173\/revisions\/102180"}],"wp:attachment":[{"href":"https:\/\/vibromera.eu\/ro\/wp-json\/wp\/v2\/media?parent=173"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/vibromera.eu\/ro\/wp-json\/wp\/v2\/categories?post=173"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/vibromera.eu\/ro\/wp-json\/wp\/v2\/tags?post=173"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}