{"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\/nb\/glossary\/frame-resonance\/","title":{"rendered":"Hva er rammeresonans? Vibrasjon i maskinstrukturen"},"content":{"rendered":"<h1>Forst\u00e5 rammeresonans<\/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\/nb\/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\/nb\/product\/balanset-1\/\" title=\"B\u00e6rbart balanseapparat og vibrasjonsanalysator 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 komplett sett med b\u00e6rbart balanseapparat og vibrasjonsanalysator\" 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\/nb\/product-category\/devices\/\" rel=\"tag\">Enheter<\/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\/nb\/product\/balanset-1\/\" title=\"B\u00e6rbart balanseapparat og vibrasjonsanalysator Balanset-1A\">B\u00e6rbart balanseapparat og vibrasjonsanalysator 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> + MVA (hvis aktuelt)<\/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=\"\/nb\/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=\"Legg i handlekurv\" data-no-translation-title=\"\"><i rel=\"tooltip\" data-original-title=\"Legg i handlekurv\" 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=\"\/nb\/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=\"Legg i handlekurv: \u00abPortable balancer &amp; Vibration analyzer Balanset-1A\u00bb\" rel=\"nofollow\" data-success_message=\"\u00abPortable balancer &amp; Vibration analyzer Balanset-1A\u00bb ble lagt til i handlekurven\" data-no-translation=\"\" data-trp-gettext=\"\" data-no-translation-aria-label=\"\" data-no-translation-data-success_message=\"\">Legg i handlekurv<\/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\/nb\/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\/nb\/product\/vibration-sensor\/\" title=\"Vibrasjonssensor\">\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=\"Balanset-1A vibrasjonssensor i n\u00e6rbilde\" 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\/nb\/product-category\/parts\/\" rel=\"tag\">Deler<\/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\/nb\/product\/vibration-sensor\/\" title=\"Vibrasjonssensor\">Vibrasjonssensor<\/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> + MVA (hvis aktuelt)<\/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=\"\/nb\/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=\"Legg i handlekurv\" data-no-translation-title=\"\"><i rel=\"tooltip\" data-original-title=\"Legg i handlekurv\" 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=\"\/nb\/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=\"Legg i handlekurv: \u00abVibration sensor\u00bb\" rel=\"nofollow\" data-success_message=\"\u00abVibration sensor\u00bb ble lagt til i handlekurven\" data-no-translation=\"\" data-trp-gettext=\"\" data-no-translation-aria-label=\"\" data-no-translation-data-success_message=\"\">Legg i handlekurv<\/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\/nb\/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\/nb\/product\/optical-sensor-for-balanset-and-arbalance\/\" title=\"Optisk sensor (lasertakometer)\">\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=\"Optisk sensor (lasertakometer)\" 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\/nb\/product-category\/parts\/\" rel=\"tag\">Deler<\/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\/nb\/product\/optical-sensor-for-balanset-and-arbalance\/\" title=\"Optisk sensor (lasertakometer)\">Optisk sensor (lasertakometer)<\/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> + MVA (hvis aktuelt)<\/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=\"\/nb\/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=\"Legg i handlekurv\" data-no-translation-title=\"\"><i rel=\"tooltip\" data-original-title=\"Legg i handlekurv\" 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=\"\/nb\/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=\"Legg i handlekurv: \u00abOptical Sensor (Laser Tachometer)\u00bb\" rel=\"nofollow\" data-success_message=\"\u00abOptical Sensor (Laser Tachometer)\u00bb ble lagt til i handlekurven\" data-no-translation=\"\" data-trp-gettext=\"\" data-no-translation-aria-label=\"\" data-no-translation-data-success_message=\"\">Legg i handlekurv<\/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\/nb\/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\/nb\/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=\"Vibromera rotorbalanseringssett: b\u00e6reveske, flerkanals signalbehandler, h\u00e5ndholdt analysator, magnetisk base, vibrasjonssensorer og spiralkabler.\" 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\/nb\/product-category\/devices\/\" rel=\"tag\">Enheter<\/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\/nb\/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> + MVA (hvis aktuelt)<\/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=\"\/nb\/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=\"Legg i handlekurv\" data-no-translation-title=\"\"><i rel=\"tooltip\" data-original-title=\"Legg i handlekurv\" 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=\"\/nb\/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=\"Legg i handlekurv: \u00abBalanset-4\u00bb\" rel=\"nofollow\" data-success_message=\"\u00abBalanset-4\u00bb ble lagt til i handlekurven\" data-no-translation=\"\" data-trp-gettext=\"\" data-no-translation-aria-label=\"\" data-no-translation-data-success_message=\"\">Legg i handlekurv<\/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\/nb\/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\/nb\/product\/magnet-stand\/\" title=\"Magnetisk stativ 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=\"Magnetisk base.\" 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\/nb\/product-category\/parts\/\" rel=\"tag\">Deler<\/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\/nb\/product\/magnet-stand\/\" title=\"Magnetisk stativ Insize-60-kgf\">Magnetisk stativ 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> + MVA (hvis aktuelt)<\/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=\"\/nb\/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=\"Legg i handlekurv\" data-no-translation-title=\"\"><i rel=\"tooltip\" 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class=\"col-ms-6 col-sm-6 col-md-3 shop-item\">\n\t\t\t\t\t\t<a href=\"https:\/\/vibromera.eu\/nb\/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\/nb\/product\/reflective-tape\/\" title=\"Refleksb\u00e5nd\">\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=\"Refleksb\u00e5nd\" 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\/nb\/product-category\/parts\/\" rel=\"tag\">Deler<\/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\/nb\/product\/reflective-tape\/\" title=\"Refleksb\u00e5nd\">Refleksb\u00e5nd<\/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> + MVA (hvis aktuelt)<\/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=\"\/nb\/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=\"Legg i handlekurv\" data-no-translation-title=\"\"><i rel=\"tooltip\" data-original-title=\"Legg i handlekurv\" 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=\"\/nb\/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=\"Legg i handlekurv: \u00abReflective tape\u00bb\" rel=\"nofollow\" data-success_message=\"\u00abReflective tape\u00bb ble lagt til i handlekurven\" data-no-translation=\"\" data-trp-gettext=\"\" data-no-translation-aria-label=\"\" data-no-translation-data-success_message=\"\">Legg i handlekurv<\/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\/nb\/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\/nb\/product\/dynamic-balancer-balanset-1a\/\" title=\"Dynamisk balanseringsapparat &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=\"Balanset-1A-settet inneholder grensesnittenhet, sensorer, turteller og tilbeh\u00f8r\" 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\/nb\/product-category\/devices\/\" rel=\"tag\">Enheter<\/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\/nb\/product\/dynamic-balancer-balanset-1a\/\" title=\"Dynamisk balanseringsapparat &quot;Balanset-1A&quot; OEM\">Dynamisk balanseringsapparat \"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> + MVA (hvis aktuelt)<\/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=\"\/nb\/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=\"Legg i handlekurv\" data-no-translation-title=\"\"><i rel=\"tooltip\" data-original-title=\"Legg i handlekurv\" 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=\"\/nb\/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=\"Legg i handlekurv: \u00abDynamic balancer \u201cBalanset-1A\u201d OEM\u00bb\" rel=\"nofollow\" data-success_message=\"\u00abDynamic balancer \u201cBalanset-1A\u201d OEM\u00bb ble lagt til i handlekurven\" data-no-translation=\"\" data-trp-gettext=\"\" data-no-translation-aria-label=\"\" data-no-translation-data-success_message=\"\">Legg i handlekurv<\/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>Rammeresonans<\/strong> er en spesifikk form av <a href=\"https:\/\/vibromera.eu\/nb\/glossary\/structural-resonance\/\">strukturell resonans<\/a> der maskinens egen ramme, hus, kabinett eller innkapsling vibrerer ved en av sine <a href=\"https:\/\/vibromera.eu\/nb\/glossary\/natural-frequency\/\">naturlige frekvenser<\/a> som respons p\u00e5 stimulering fra de roterende komponentene. I motsetning til fundamentet eller <a href=\"https:\/\/vibromera.eu\/nb\/glossary\/pedestal-looseness\/\">pedestal<\/a> Mens resonanser som involverer b\u00e6restrukturen under maskinen oppst\u00e5r, finnes rammeresonansen i selve maskinhuset \u2013 den st\u00f8pejerns- eller st\u00e5lkonstruksjonen som omslutter de roterende delene. N\u00e5r en p\u00e5f\u00f8ringsfrekvens faller sammen med en naturlig frekvens i rammen, <a href=\"https:\/\/vibromera.eu\/nb\/glossary\/resonance\/\">resonans<\/a> forsterker bevegelsen langt utover det som drivkraften alene ville ha for\u00e5rsaket.<\/p>\n<p>Rammresonans er vanlig i maskiner med store, relativt lette hus \u2013 vifter, bl\u00e5semaskiner, pumper og motorer. Det viser seg vanligvis som overdreven st\u00f8y, synlige vibrasjoner i deksler eller paneler og h\u00f8y <a href=\"https:\/\/vibromera.eu\/nb\/glossary\/vibration\/\">vibrasjon<\/a> m\u00e5leverdier p\u00e5 rammen som st\u00e5r i sterk kontrast til rotorens faktiske vibrasjon. Fordi dette symptomet ser alarmerende ut, er rammresonans et av de problemene som oftest feildiagnostiseres i praksis: en analytiker ser en sv\u00e6rt h\u00f8y m\u00e5leverdi og erkl\u00e6rer en perfekt balansert rotor for defekt.<\/p>\n<h2>1. Definisjon: Hva er rammeresonans?<\/h2>\n<p>Hver konstruksjon har et sett med naturlige frekvenser og tilh\u00f8rende svingningsformer som den har en tendens til \u00e5 b\u00f8ye seg i. En maskinramme er intet unntak. Veggene, endeplater, f\u00f8tter og paneler har hver sine b\u00f8ye- og vridningsmoduser, og et tynt dekkpanel kan ha flere egne moduser innenfor det h\u00f8rbare frekvensomr\u00e5det. S\u00e5 lenge disse frekvensene ikke overlapper maskinens drivfrekvenser, overf\u00f8rer rammen kraften uten st\u00f8y. Problemene begynner n\u00e5r en driftsfrekvens sammenfaller med en rammeform og konstruksjonen begynner \u00e5 ringe.<\/p>\n<p>Det som kjennetegner rammeresonans er <em>amplification<\/em>: Rammen beveger seg flere ganger mer enn lagrene den omgir. Energien kommer fra rotoren, men responsen tilh\u00f8rer konstruksjonen. Dette er grunnen til at m\u00e5linger p\u00e5 rammen kan vise fem til ti ganger h\u00f8yere verdier enn m\u00e5linger ved lagerhuset, som ligger bare noen centimeter unna. Den underliggende egenskapen som avgj\u00f8r hvor disse svingningstilstandene oppst\u00e5r, er <a href=\"https:\/\/vibromera.eu\/nb\/glossary\/stiffness\/\">stivhet<\/a> I forhold til massen \u2014 stiver man opp rammen, \u00f8ker frekvensene; legger man til masse, synker de.<\/p>\n<h2>2. Vanlige tilfeller av rammeresonans<\/h2>\n<h3>Motor- og generatorrammer<\/h3>\n<ul>\n<li><strong>Egenfrekvenser:<\/strong> vanligvis 50\u2013400 Hz, avhengig av st\u00f8rrelse og konstruksjon.<\/li>\n<li><strong>Eksitasjon:<\/strong> 1\u00d7 (<a href=\"https:\/\/vibromera.eu\/nb\/glossary\/unbalance\/\">ubalanse<\/a>), 2\u00d7 nettfrekvensen (120 Hz ved 60 Hz nettfrekvens, 100 Hz ved 50 Hz), og elektromagnetiske krefter knyttet til <a href=\"https:\/\/vibromera.eu\/nb\/glossary\/electrical-frequency\/\">frekvens<\/a>.<\/li>\n<li><strong>Symptomer:<\/strong> Vibrasjonene i rammen er langt sterkere enn vibrasjonene i lagrene; en h\u00f8rbar brumming eller summing.<\/li>\n<li><strong>Alvorlighetsgrad:<\/strong> rammen kan ha en belastning som er 5\u201310 ganger h\u00f8yere enn lagrene.<\/li>\n<\/ul>\n<h3>Vifte- og bl\u00e5sehus<\/h3>\n<ul>\n<li><strong>Egenfrekvenser:<\/strong> 20\u2013200 Hz for vanlige industrivifter.<\/li>\n<li><strong>Eksitasjon:<\/strong> <a href=\"https:\/\/vibromera.eu\/nb\/glossary\/blade-passing-frequency\/\">bladpasseringsfrekvens<\/a> (antall blader \u00d7 omdreininger per minutt).<\/li>\n<li><strong>Symptomer:<\/strong> Huspaneler vibrerer voldsomt; h\u00f8y aerodynamisk st\u00f8y<\/li>\n<li><strong>Karakteristisk:<\/strong> kan forekomme kun ved bestemte hastigheter eller str\u00f8mningsforhold.<\/li>\n<\/ul>\n<h3>Pump casings<\/h3>\n<ul>\n<li><strong>Egenfrekvenser:<\/strong> 30\u2013300 Hz, avhengig av kabinettets utforming.<\/li>\n<li><strong>Eksitasjon:<\/strong> <a href=\"https:\/\/vibromera.eu\/nb\/glossary\/vane-passing-frequency\/\">vingepasseringsfrekvens<\/a> og hydrauliske svingninger.<\/li>\n<li><strong>Symptomer:<\/strong> Vibrasjoner i huset, st\u00f8y og fare for utmattingssprekkdannelse.<\/li>\n<li><strong>Hydraulisk kobling:<\/strong> Et v\u00e6skefylt hus kan forsterke vibrasjonene i rotoren og huset, noe som gj\u00f8r situasjonen mer komplisert.<\/li>\n<\/ul>\n<h3>Girkassehus<\/h3>\n<ul>\n<li>Excited by <a href=\"https:\/\/vibromera.eu\/nb\/glossary\/gear-mesh-frequency\/\">girinngrepsfrekvens<\/a>.<\/li>\n<li>Rammens egenfrekvenser overlapper ofte med nettets frekvens og dens overtoner.<\/li>\n<li>Avgir en karakteristisk, h\u00f8ylydt knirkelyd n\u00e5r den g\u00e5r i resonans.<\/li>\n<\/ul>\n<h2>3. Vibrasjonssignatur og -deteksjon<\/h2>\n<h3>Typiske symptomer<\/h3>\n<ul>\n<li><strong>Avhengig av sted:<\/strong> Vibrasjonen varierer kraftig over hele rammeoverflaten \u2013 det er vanlig med 10 ganger s\u00e5 store forskjeller mellom ulike punkter.<\/li>\n<li><strong>Lager vs. ramme:<\/strong> Vibrasjonene i rammen er langt st\u00f8rre enn vibrasjonene i lagrene (ofte 3\u201310 ganger st\u00f8rre).<\/li>\n<li><strong>Frekvensspesifikk:<\/strong> Problemet oppst\u00e5r kun ved resonansfrekvensen; andre frekvenser ser normale ut.<\/li>\n<li><strong>Hastighetsavhengig:<\/strong> kraftig innenfor et smalt b\u00e5nd (\u00b110\u201320 % av resonanshastigheten).<\/li>\n<li><strong>Visual motion:<\/strong> Bildeforskyvningen er ofte synlig for det blotte \u00f8ye.<\/li>\n<\/ul>\n<h3>St\u00f8tpr\u00f8ve<\/h3>\n<p>Den avgj\u00f8rende testen. Sl\u00e5 p\u00e5 rammen med en gummihammer eller en hammer med m\u00e5leinstrumenter, og m\u00e5l responsen med en <a href=\"https:\/\/vibromera.eu\/nb\/glossary\/accelerometer\/\">akselerometer<\/a>, og avlesne rammens naturlige frekvenser ut fra toppene i frekvensresponsen. Ved \u00e5 sammenligne disse toppene med driftsfrekvensene (1\u00d7, 2\u00d7, bladpassering osv.) avsl\u00f8res eventuelle farlige sammenfall umiddelbart. Se <a href=\"https:\/\/vibromera.eu\/nb\/glossary\/bump-test\/\">bumptest<\/a> og <a href=\"https:\/\/vibromera.eu\/nb\/glossary\/impact-testing\/\">slagpr\u00f8ving<\/a> for den fullstendige fremgangsm\u00e5ten.<\/p>\n<h3>Unders\u00f8kelse med mobilt akselerometer<\/h3>\n<p>Mens maskinen er i gang, m\u00e5ler man vibrasjonen p\u00e5 flere steder langs rammen og lager et vibrasjonskart som viser omr\u00e5der med h\u00f8y og lav vibrasjon. M\u00f8nsteret avsl\u00f8rer svingningsformen \u2013 b\u00f8yning, vridning eller fleksing av paneler \u2013 og angir antinodene (st\u00f8rst bevegelse) og nodene (minst bevegelse). En fullstendig <a href=\"https:\/\/vibromera.eu\/nb\/glossary\/ods-analysis\/\">analyse av driftsavb\u00f8yningsform (ODS)<\/a> gir bevegelse til dette, og formelt <a href=\"https:\/\/vibromera.eu\/nb\/glossary\/modal-analysis\/\">modal analyse<\/a> utvinder de underliggende modusene.<\/p>\n<h3>M\u00e5ling av overf\u00f8ringsfunksjon<\/h3>\n<p>M\u00e5l <a href=\"https:\/\/vibromera.eu\/nb\/glossary\/coherence\/\">sammenheng<\/a> mellom lagervibrasjon (inngangssignalet) og rammevibrasjon (utgangssignalet). H\u00f8y koherens ved en bestemt frekvens bekrefter at rammebevegelsen drives av, og er i resonans med, rotortilf\u00f8rselen. Den <a href=\"https:\/\/vibromera.eu\/nb\/glossary\/transfer-function\/\">overf\u00f8ringsfunksjon<\/a> den angir selv forsterkningsfaktoren.<\/p>\n<h2>4. Bekreftelse av resonans i feltet<\/h2>\n<p>F\u00f8r noen konstruksjon avstives eller noen rotor ber\u00f8res, m\u00e5 diagnosen bekreftes \u2013 og det inneb\u00e6rer at rotorens faktiske oppf\u00f8rsel m\u00e5 m\u00e5les uavhengig av rammens. En b\u00e6rbar tokanalsanalysator som <a href=\"https:\/\/vibromera.eu\/nb\/produkt\/balanset-1\/\">Balanset-1A<\/a> gj\u00f8r dette enkelt: en analytiker kan registrere <a href=\"https:\/\/vibromera.eu\/nb\/glossary\/phase\/\">amplitude og fase<\/a> og hele spekteret ved lagerhuset, f\u00f8r du deretter flytter sensoren over til det aktuelle panelet og observerer at niv\u00e5et stiger ved resonansfrekvensen mens fasen skifter gjennom strukturmodusen. Hvis rotorens 1\u00d7-vibrasjon er beskjeden ved lageret, men sv\u00e6rt sterk p\u00e5 rammen, er konklusjonen resonans, ikke ubalans. Det samme instrumentet lar deg pr\u00f8vebalansere rotoren for \u00e5 utelukke eller bekrefte ubalanse, og kj\u00f8re en utl\u00f8pspr\u00f8ve slik at resonanstoppen vises n\u00e5r hastigheten passerer den.<\/p>\n<h2>5. L\u00f8sninger og avb\u00f8tende tiltak<\/h2>\n<h3>Forstivende endringer<\/h3>\n<ul>\n<li><strong>Legg til forsterkningsribber eller forsterkningsplater:<\/strong> \u00f8ker b\u00f8yestivheten, hever egenfrekvensen over eksitasjonsomr\u00e5det, er kostnadseffektiv og kan ettermonteres p\u00e5 eksisterende utstyr.<\/li>\n<li><strong>\u00d8k materialtykkelsen:<\/strong> \u00c5 gj\u00f8re rammeveggene eller panelene tykkere \u00f8ker stivheten og frekvensen betydelig, selv om det kan kreve nye st\u00f8pegods eller konstruksjoner.<\/li>\n<li><strong>Konstruksjonsb\u00e5nd og avstivning:<\/strong> Ved \u00e5 koble sammen rammens motsatte sider unng\u00e5r man at den b\u00f8yer seg; tverrstivere gir \u00f8kt vridningsstivhet og kan ofte monteres p\u00e5 utsiden.<\/li>\n<\/ul>\n<h3>Mass addition<\/h3>\n<ul>\n<li><strong>Senk egenfrekvensen:<\/strong> \u00f8ke massen for \u00e5 senke frekvensen under eksitasjonsomr\u00e5det.<\/li>\n<li><strong>Strategisk plassering:<\/strong> Legg til vekt p\u00e5 antinodepunktene for \u00e5 oppn\u00e5 best mulig effekt.<\/li>\n<li><strong>Tuned mass:<\/strong> En n\u00f8ye beregnet masse forskyver en bestemt problematisk svingningstilstand.<\/li>\n<li><strong>Avveining:<\/strong> Ekstra vekt er ikke alltid \u00f8nskelig i alle sammenhenger.<\/li>\n<\/ul>\n<p>Uansett om du velger \u00e5 \u00f8ke eller redusere frekvensen, vil en rask beregning sikre at du unng\u00e5r det neste resonansb\u00e5ndet. A <a href=\"https:\/\/vibromera.eu\/nb\/calculators\/foundation-natural-frequency\/\">Kalkulator for grunnmurens egenfrekvens<\/a> og en <a href=\"https:\/\/vibromera.eu\/nb\/calculators\/damping-ratio-calculator\/\">Kalkulator for dempningsforhold<\/a> hjelpe deg med \u00e5 beregne hvor en endret konstruksjon vil ende opp f\u00f8r det blir kuttet i metallet.<\/p>\n<h3>Dempingsbehandlinger<\/h3>\n<ul>\n<li><strong>Demping med begrenset lag:<\/strong> et viskoelastisk lag som er plassert mellom metallplater, og som brukes p\u00e5 store, flate paneler og deksler. Reduserer resonanstoppen med 50\u201380 % og fungerer godt i frekvensomr\u00e5det 20\u2013500 Hz.<\/li>\n<li><strong>Demping av fritt lag:<\/strong> dempingsmateriale som er festet direkte p\u00e5 den vibrerende overflaten \u2014 enklere enn \u00abconstrained-layer\u00bb, men mindre effektivt; egnet der tilgangen er begrenset.<\/li>\n<\/ul>\n<h3>Driftsmessige endringer<\/h3>\n<ul>\n<li><strong>Hastighetsendring:<\/strong> kj\u00f8re med en hastighet der det ikke oppst\u00e5r resonans.<\/li>\n<li><strong>Reduser eksitasjonskraft:<\/strong> improve <a href=\"https:\/\/vibromera.eu\/nb\/glossary\/balansering\/\">balansere<\/a> og <a href=\"https:\/\/vibromera.eu\/nb\/glossary\/misalignment\/\">justering<\/a> for \u00e5 redusere eksitasjonsamplituden som driver resonansen.<\/li>\n<li><strong>Endringer i prosessen:<\/strong> Endre str\u00f8mning, trykk eller last for \u00e5 endre eksitasjonsfrekvenser<\/li>\n<\/ul>\n<h2>6. Forebygging gjennom design<\/h2>\n<h3>Designprinsipper<\/h3>\n<ul>\n<li><strong>Tilstrekkelig stivhet:<\/strong> utforme rammen slik at dens egenfrekvenser ligger over 2 ganger den h\u00f8yeste driftsfrekvensen.<\/li>\n<li><strong>Massefordeling:<\/strong> Unng\u00e5 tette masser som skaper lavfrekvente svingninger.<\/li>\n<li><strong>Ribber og forsterkning:<\/strong> bygge inn avstivende elementer helt fra starten av.<\/li>\n<li><strong>Modalanalyse:<\/strong> Bruk FEA under prosjekteringen for \u00e5 forutsi og optimalisere egenfrekvensene.<\/li>\n<\/ul>\n<h3>Designverifisering<\/h3>\n<ul>\n<li>Prototypetesting med konsekvensanalyse.<\/li>\n<li>M\u00e5ling av driftsavb\u00f8yningsform p\u00e5 de f\u00f8rste enhetene som ble bygget.<\/li>\n<li>Gj\u00f8r endringer i konstruksjonen f\u00f8r produksjonen dersom det oppdages resonanser.<\/li>\n<\/ul>\n<h2>7. Eksempelcase<\/h2>\n<p><strong>Situasjon:<\/strong> en 75 hk-motor som driver en sentrifugalvifte, med kraftig st\u00f8y og vibrasjon.<\/p>\n<ul>\n<li><strong>Symptomer:<\/strong> Vibrasjon i motorrammen p\u00e5 12 mm\/s; vibrasjon i lageret p\u00e5 bare 2,5 mm\/s.<\/li>\n<li><strong>Hyppighet:<\/strong> 120 Hz (dobbel linjefrekvens ved 60 Hz-nett).<\/li>\n<li><strong>Impact test:<\/strong> viste at rammens egenfrekvens l\u00e5 p\u00e5 118 Hz \u2013 nesten n\u00f8yaktig p\u00e5 p\u00e5f\u00f8ringsfrekvensen.<\/li>\n<li><strong>Rot\u00e5rsak:<\/strong> Rammen resonerte ved den elektromagnetiske drivfrekvensen.<\/li>\n<li><strong>L\u00f8sning:<\/strong> Det ble montert fire vinkeljernforst\u00e6rkninger som forbinder motorens f\u00f8tter med endeplater.<\/li>\n<li><strong>Resultat:<\/strong> rammens egenfrekvens endret seg til 165 Hz, og vibrasjonen falt til 3,2 mm\/s \u2013 godt tilbake innenfor det akseptable omr\u00e5det under <a href=\"https:\/\/vibromera.eu\/nb\/glossary\/iso-20816-3\/\">ISO 20816-3<\/a> (den moderne etterf\u00f8lgeren til ISO 10816-3).<\/li>\n<li><strong>Koste:<\/strong> Omtrent 200 dollar i materialkostnader, mot rundt 8 000 dollar for \u00e5 skifte motor.<\/li>\n<\/ul>\n<p>Rammresonans er et vanlig, men ofte feildiagnostisert vibrasjonsproblem. Ved \u00e5 gjenkjenne de karakteristiske symptomene \u2013 kraftige rammvibrasjoner i forhold til lagervibrasjoner, med en tydelig frekvensspesifikk karakter og sterk avhengighet av plassering \u2013 og bruke de riktige diagnostiske teknikkene (slagpr\u00f8ving og ODS-analyse), kan man gjennomf\u00f8re m\u00e5lrettede tiltak som reduserer vibrasjonene betydelig til en sv\u00e6rt rimelig pris.<\/p>\n<hr>\n<p><a href=\"https:\/\/vibromera.eu\/nb\/glossary\/\">\u2190 Tilbake til hovedindeksen<\/a><\/p>","protected":false},"excerpt":{"rendered":"<p>L\u00e6r om rammeresonans, vibrasjonsforsterkning n\u00e5r maskinrammer, hus eller foringsr\u00f8r resonerer ved driftsfrekvenser, noe som for\u00e5rsaker overdreven st\u00f8y og strukturell belastning.<\/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\/nb\/wp-json\/wp\/v2\/glossary\/125","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/vibromera.eu\/nb\/wp-json\/wp\/v2\/glossary"}],"about":[{"href":"https:\/\/vibromera.eu\/nb\/wp-json\/wp\/v2\/types\/glossary"}],"version-history":[{"count":1,"href":"https:\/\/vibromera.eu\/nb\/wp-json\/wp\/v2\/glossary\/125\/revisions"}],"predecessor-version":[{"id":101384,"href":"https:\/\/vibromera.eu\/nb\/wp-json\/wp\/v2\/glossary\/125\/revisions\/101384"}],"wp:attachment":[{"href":"https:\/\/vibromera.eu\/nb\/wp-json\/wp\/v2\/media?parent=125"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/vibromera.eu\/nb\/wp-json\/wp\/v2\/categories?post=125"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/vibromera.eu\/nb\/wp-json\/wp\/v2\/tags?post=125"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}