{"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\/fi\/glossary\/nodal-point\/","title":{"rendered":"Mik\u00e4 on roottorin v\u00e4r\u00e4htelyn solmupiste?"},"content":{"rendered":"<h1>Roottorin v\u00e4r\u00e4htelyn solmupisteiden ymm\u00e4rt\u00e4minen<\/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\/fi\/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\/fi\/product\/balanset-1\/\" title=\"Kannettava tasapainotin ja t\u00e4rin\u00e4analysaattori 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 kannettava tasapainotin ja v\u00e4r\u00e4htelyanalysaattori, t\u00e4ydellinen sarja\" 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\/fi\/product-category\/devices\/\" rel=\"tag\">Laitteet<\/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\/fi\/product\/balanset-1\/\" title=\"Kannettava tasapainotin ja t\u00e4rin\u00e4analysaattori Balanset-1A\">Kannettava tasapainotin &#038; t\u00e4rin\u00e4analysaattori 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\">&euro;<\/span>1,975.00<\/span> + ALV (jos sovellettavissa)<\/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=\"\/fi\/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=\"Lis\u00e4\u00e4 ostoskoriin\" data-no-translation-title=\"\"><i rel=\"tooltip\" data-original-title=\"Lis\u00e4\u00e4 ostoskoriin\" 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=\"\/fi\/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=\"Lis\u00e4\u00e4 ostoskoriin: \u201cPortable balancer &amp; Vibration analyzer Balanset-1A\u201d\" rel=\"nofollow\" data-success_message=\"\u201cPortable balancer &amp; Vibration analyzer Balanset-1A\u201d on lis\u00e4tty ostoskoriin\" data-no-translation=\"\" data-trp-gettext=\"\" data-no-translation-aria-label=\"\" data-no-translation-data-success_message=\"\">Lis\u00e4\u00e4 ostoskoriin<\/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\/fi\/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\/fi\/product\/vibration-sensor\/\" title=\"T\u00e4rin\u00e4anturi\">\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:n t\u00e4rin\u00e4anturin l\u00e4hikuva\" 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\/fi\/product-category\/parts\/\" rel=\"tag\">Osat<\/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\/fi\/product\/vibration-sensor\/\" title=\"T\u00e4rin\u00e4anturi\">T\u00e4rin\u00e4anturi<\/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\">&euro;<\/span>90.00<\/span> + ALV (jos sovellettavissa)<\/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=\"\/fi\/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=\"Lis\u00e4\u00e4 ostoskoriin\" data-no-translation-title=\"\"><i rel=\"tooltip\" data-original-title=\"Lis\u00e4\u00e4 ostoskoriin\" 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=\"\/fi\/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=\"Lis\u00e4\u00e4 ostoskoriin: \u201cVibration sensor\u201d\" rel=\"nofollow\" data-success_message=\"\u201cVibration sensor\u201d on lis\u00e4tty ostoskoriin\" data-no-translation=\"\" data-trp-gettext=\"\" data-no-translation-aria-label=\"\" data-no-translation-data-success_message=\"\">Lis\u00e4\u00e4 ostoskoriin<\/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\/fi\/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\/fi\/product\/optical-sensor-for-balanset-and-arbalance\/\" title=\"Optinen anturi (lasertakometri)\">\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=\"Optinen anturi (lasertakometri)\" 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\/fi\/product-category\/parts\/\" rel=\"tag\">Osat<\/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\/fi\/product\/optical-sensor-for-balanset-and-arbalance\/\" title=\"Optinen anturi (lasertakometri)\">Optinen anturi (lasertakometri)<\/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\">&euro;<\/span>124.00<\/span> + ALV (jos sovellettavissa)<\/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=\"\/fi\/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=\"Lis\u00e4\u00e4 ostoskoriin\" data-no-translation-title=\"\"><i rel=\"tooltip\" data-original-title=\"Lis\u00e4\u00e4 ostoskoriin\" 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=\"\/fi\/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=\"Lis\u00e4\u00e4 ostoskoriin: \u201cOptical Sensor (Laser Tachometer)\u201d\" rel=\"nofollow\" data-success_message=\"\u201cOptical Sensor (Laser Tachometer)\u201d on lis\u00e4tty ostoskoriin\" data-no-translation=\"\" data-trp-gettext=\"\" data-no-translation-aria-label=\"\" data-no-translation-data-success_message=\"\">Lis\u00e4\u00e4 ostoskoriin<\/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\/fi\/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\/fi\/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-roottorin tasapainotussarja: kantolaukku, monikanavainen signaalimuunnin, k\u00e4dess\u00e4 pidett\u00e4v\u00e4 analysaattori, magneettijalusta, t\u00e4rin\u00e4anturit ja kierretyt kaapelit.\" 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\/fi\/product-category\/devices\/\" rel=\"tag\">Laitteet<\/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\/fi\/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\">&euro;<\/span>6,803.00<\/span> + ALV (jos sovellettavissa)<\/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=\"\/fi\/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=\"Lis\u00e4\u00e4 ostoskoriin\" data-no-translation-title=\"\"><i rel=\"tooltip\" data-original-title=\"Lis\u00e4\u00e4 ostoskoriin\" 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=\"\/fi\/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=\"Lis\u00e4\u00e4 ostoskoriin: \u201cBalanset-4\u201d\" rel=\"nofollow\" data-success_message=\"\u201cBalanset-4\u201d on lis\u00e4tty ostoskoriin\" data-no-translation=\"\" data-trp-gettext=\"\" data-no-translation-aria-label=\"\" data-no-translation-data-success_message=\"\">Lis\u00e4\u00e4 ostoskoriin<\/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\/fi\/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\/fi\/product\/magnet-stand\/\" title=\"Magneettinen jalusta 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=\"Magneettipohja.\" 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\/fi\/product-category\/parts\/\" rel=\"tag\">Osat<\/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\/fi\/product\/magnet-stand\/\" title=\"Magneettinen jalusta Insize-60-kgf\">Magneettinen jalusta 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\">&euro;<\/span>46.00<\/span> + ALV (jos sovellettavissa)<\/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=\"\/fi\/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=\"Lis\u00e4\u00e4 ostoskoriin\" data-no-translation-title=\"\"><i rel=\"tooltip\" data-original-title=\"Lis\u00e4\u00e4 ostoskoriin\" 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=\"\/fi\/wp-json\/wp\/v2\/glossary\/173?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=\"Lis\u00e4\u00e4 ostoskoriin: \u201cMagnetic Stand Insize-60-kgf\u201d\" rel=\"nofollow\" data-success_message=\"\u201cMagnetic Stand Insize-60-kgf\u201d on lis\u00e4tty ostoskoriin\" data-no-translation=\"\" data-trp-gettext=\"\" data-no-translation-aria-label=\"\" data-no-translation-data-success_message=\"\">Lis\u00e4\u00e4 ostoskoriin<\/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\/fi\/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\/fi\/product\/reflective-tape\/\" title=\"Heijastava nauha\">\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=\"Heijastava nauha\" 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\/fi\/product-category\/parts\/\" rel=\"tag\">Osat<\/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\/fi\/product\/reflective-tape\/\" title=\"Heijastava nauha\">Heijastava nauha<\/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\">&euro;<\/span>10.00<\/span> + ALV (jos sovellettavissa)<\/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=\"\/fi\/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=\"Lis\u00e4\u00e4 ostoskoriin\" data-no-translation-title=\"\"><i rel=\"tooltip\" data-original-title=\"Lis\u00e4\u00e4 ostoskoriin\" 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=\"\/fi\/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=\"Lis\u00e4\u00e4 ostoskoriin: \u201cReflective tape\u201d\" rel=\"nofollow\" data-success_message=\"\u201cReflective tape\u201d on lis\u00e4tty ostoskoriin\" data-no-translation=\"\" data-trp-gettext=\"\" data-no-translation-aria-label=\"\" data-no-translation-data-success_message=\"\">Lis\u00e4\u00e4 ostoskoriin<\/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\/fi\/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\/fi\/product\/dynamic-balancer-balanset-1a\/\" title=\"Dynaaminen tasapainotin &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-pakkauksen sis\u00e4lt\u00f6, jossa on liit\u00e4nt\u00e4yksikk\u00f6, anturit, kierroslukumittari ja lis\u00e4varusteet\" 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\/fi\/product-category\/devices\/\" rel=\"tag\">Laitteet<\/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\/fi\/product\/dynamic-balancer-balanset-1a\/\" title=\"Dynaaminen tasapainotin &quot;Balanset-1A&quot; OEM\">Dynaaminen tasapainotin \"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\">&euro;<\/span>1,735.00<\/span> + ALV (jos sovellettavissa)<\/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=\"\/fi\/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=\"Lis\u00e4\u00e4 ostoskoriin\" data-no-translation-title=\"\"><i rel=\"tooltip\" data-original-title=\"Lis\u00e4\u00e4 ostoskoriin\" 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=\"\/fi\/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=\"Lis\u00e4\u00e4 ostoskoriin: \u201cDynamic balancer \u201cBalanset-1A\u201d OEM\u201d\" rel=\"nofollow\" data-success_message=\"\u201cDynamic balancer \u201cBalanset-1A\u201d OEM\u201d on lis\u00e4tty ostoskoriin\" data-no-translation=\"\" data-trp-gettext=\"\" data-no-translation-aria-label=\"\" data-no-translation-data-success_message=\"\">Lis\u00e4\u00e4 ostoskoriin<\/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>solmukohta<\/strong> \u2013 jota kutsutaan my\u00f6s solmuksi tai solmuviivaksi, kun liikett\u00e4 tarkastellaan kolmiulotteisesti \u2013 on tietty sijainti v\u00e4r\u00e4htelev\u00e4n <a href=\"https:\/\/vibromera.eu\/fi\/glossary\/roottori\/\">roottori<\/a> miss\u00e4 <a href=\"https:\/\/vibromera.eu\/fi\/glossary\/displacement\/\">siirtym\u00e4<\/a> pysyy nollassa, kun roottori v\u00e4r\u00e4htelee tietyll\u00e4 <a href=\"https:\/\/vibromera.eu\/fi\/glossary\/natural-frequency\/\">ominaistaajuus<\/a>. Vaikka akselin muu osa taipuu ja pyyhk\u00e4isee liikkeens\u00e4 l\u00e4pi, solmupiste pysyy paikallaan suhteessa akselin neutraaliasentoon. Solmupisteet ovat perusominaisuuksia <a href=\"https:\/\/vibromera.eu\/fi\/glossary\/mode-shape\/\">moodimuodot<\/a>, ja sen tiet\u00e4minen, mihin ne kuuluvat, on ratkaisevaa, kun on kyse <a href=\"https:\/\/vibromera.eu\/fi\/glossary\/rotor-dynamics\/\">roottorin dynamiikka<\/a> analyysi\u00e4 varten, <a href=\"https:\/\/vibromera.eu\/fi\/glossary\/tasapainottaminen\/\">tasapainottaminen<\/a> strategiaa ja p\u00e4\u00e4t\u00f6st\u00e4 siit\u00e4, mihin t\u00e4rin\u00e4anturit asennetaan. Jos arvioit ne v\u00e4\u00e4rin, tasapainotusty\u00f6 ep\u00e4onnistuu tai valvontaj\u00e4rjestelm\u00e4 sokeutuu todelliselle v\u00e4r\u00e4htelylle; jos ymm\u00e4rr\u00e4t ne, molemmista tulee yksinkertaisia.<\/p>\n<h2>1. Solmupisteet eri v\u00e4r\u00e4htelymoodeissa<\/h2>\n<p>Jokaisella akselin moodilla on oma solmujen ja antisolmujen kuvionsa, joka muuttuu monimutkaisemmaksi moodin lukum\u00e4\u00e4r\u00e4n kasvaessa.<\/p>\n<h3>Ensimm\u00e4inen taivutustila<\/h3>\n<p>Ensimm\u00e4isell\u00e4 (perus)taivutusmoodilla on tyypillisesti:<\/p>\n<ul>\n<li><strong>nolla sis\u00e4ist\u00e4 solmua<\/strong> - akselin j\u00e4nnev\u00e4lill\u00e4 ei ole nollataipumaa;<\/li>\n<li><strong>laakeripaikat likim\u00e4\u00e4r\u00e4isin\u00e4 solmuina<\/strong> - yksinkertaisesti tuetussa asettelussa laakerit toimivat l\u00e4hell\u00e4 solmupisteit\u00e4;<\/li>\n<li><strong>suurin taipuma<\/strong> l\u00e4hell\u00e4 laakereiden v\u00e4list\u00e4 j\u00e4nnev\u00e4li\u00e4; ja<\/li>\n<li><strong>yksinkertainen kaaren muoto<\/strong> - akseli taipuu yhten\u00e4 tasaisena kaarena.<\/li>\n<\/ul>\n<h3>Toinen taivutustila<\/h3>\n<p>Toisella moodilla on monimutkaisempi kuvio:<\/p>\n<ul>\n<li><strong>yksi sis\u00e4inen solmu<\/strong> - yksi piste, yleens\u00e4 l\u00e4hell\u00e4 j\u00e4nnev\u00e4lien puoliv\u00e4li\u00e4, jossa taipuma on nolla;<\/li>\n<li><strong>S-k\u00e4yr\u00e4n muotoinen<\/strong> - akseli taipuu vastakkaisiin suuntiin solmun molemmin puolin;<\/li>\n<li><strong>kaksi antisolmua<\/strong> - suurin taipuma solmupisteen kummallakin puolella; ja<\/li>\n<li><strong>korkeampi taajuus<\/strong> - sen ominaistaajuus on selv\u00e4sti ensimm\u00e4isen moodin yl\u00e4puolella.<\/li>\n<\/ul>\n<h3>Kolmas tila ja korkeampi<\/h3>\n<ul>\n<li><strong>kolmas moodi:<\/strong> kaksi sis\u00e4ist\u00e4 solmupistett\u00e4 ja kolme antisolmupistett\u00e4;<\/li>\n<li><strong>nelj\u00e4s muoto:<\/strong> kolme solmupistett\u00e4 ja nelj\u00e4 antisolmupistett\u00e4;<\/li>\n<li><strong>yleinen s\u00e4\u00e4nt\u00f6:<\/strong> moodilla N on (N \u2212 1) sis\u00e4ist\u00e4 solmupistett\u00e4; ja<\/li>\n<li><strong>lis\u00e4\u00e4ntyv\u00e4 monimutkaisuus:<\/strong> korkeammissa moodeissa on asteittain monimutkaisempia aaltokuvioita.<\/li>\n<\/ul>\n<h2>2. Solmupisteiden fyysinen merkitys<\/h2>\n<h3>Nolla taipumaa \u2014 mutta suurin j\u00e4nnitys<\/h3>\n<p>Solmupisteess\u00e4 kyseisen moodin ominaistaajuudella tapahtuvan v\u00e4r\u00e4htelyn aikana:<\/p>\n<ul>\n<li>sivusiirtym\u00e4 on nolla ja akseli kulkee neutraaliakselinsa kautta;<\/li>\n<li>kuitenkin taivutusj\u00e4nnitys on tyypillisesti suurimmillaan, koska taipumak\u00e4yr\u00e4n kaltevuus on siell\u00e4 jyrkimmill\u00e4\u00e4n; ja<\/li>\n<li>my\u00f6s leikkausvoimat ovat suurimmillaan solmupisteess\u00e4.<\/li>\n<\/ul>\n<p>T\u00e4m\u00e4 intuitiivisesti vastakkainen yhdistelm\u00e4 \u2014 v\u00e4hiten liikett\u00e4, eniten rasitusta \u2014 selitt\u00e4\u00e4, miksi solmu voi olla erinomainen tukipiste, mutta huono paikka arvioida roottorin kuntoa pelk\u00e4n liikkeen perusteella.<\/p>\n<h3>Nollaherkkyys<\/h3>\n<p>Solmupisteeseen kohdistetulla voimalla tai massalla on minimaalinen vaikutus kyseiseen moodiin:<\/p>\n<ul>\n<li>lis\u00e4\u00e4m\u00e4ll\u00e4 <a href=\"https:\/\/vibromera.eu\/fi\/glossary\/correction-weight\/\">korjauspainot<\/a> solmupisteess\u00e4 ei juurikaan auta tasapainottamaan t\u00e4t\u00e4 tilaa;<\/li>\n<li>solmupisteeseen sijoitetut anturit havaitsevat kyseisen moodin minimaalisen t\u00e4rin\u00e4n; ja<\/li>\n<li>tuki tai rajoitus solmupisteess\u00e4 vaikuttaa tuskin lainkaan moodin ominaistaajuuteen.<\/li>\n<\/ul>\n<h2>3. Tasapainottamisen k\u00e4yt\u00e4nn\u00f6n seuraukset<\/h2>\n<h3>Korjaustason valinta<\/h3>\n<p>Solmupisteiden sijainnin tunteminen ohjaa koko tasapainotusmenetelm\u00e4\u00e4, ja se eroaa jyrk\u00e4sti j\u00e4yk\u00e4n ja joustavan roottorin v\u00e4lill\u00e4.<\/p>\n<h4>J\u00e4ykille roottoreille<\/h4>\n<ul>\n<li>ne toimivat alle ensimm\u00e4isen kriittisen nopeuden;<\/li>\n<li>ensimm\u00e4inen moodi ei ole merkitt\u00e4v\u00e4sti viritetty;<\/li>\n<li>standardi <a href=\"https:\/\/vibromera.eu\/fi\/glossary\/two-plane-balancing\/\">kahden tason tasapainotus<\/a> l\u00e4hell\u00e4 roottorin p\u00e4it\u00e4 on tehokas; ja<\/li>\n<li>solmupisteet eiv\u00e4t ole ensisijainen huolenaihe.<\/li>\n<\/ul>\n<h4>Joustaville roottoreille<\/h4>\n<ul>\n<li>ne toimivat kriittisill\u00e4 nopeuksilla tai niiden yl\u00e4puolella;<\/li>\n<li>on otettava huomioon moodimuodot ja solmupisteet;<\/li>\n<li><strong>tehokas <a href=\"https:\/\/vibromera.eu\/fi\/glossary\/correction-plane\/\">korjaustasot<\/a><\/strong> sijaitsevat antinoodeissa tai niiden l\u00e4heisyydess\u00e4 \u2014 pisteiss\u00e4, joissa taipuma on suurin;<\/li>\n<li><strong>tehottomat paikat<\/strong> ovat solmupisteess\u00e4 tai sen l\u00e4hell\u00e4 olevia korjaustasoja, jotka tuskin vaikuttavat kyseiseen moodiin, ja<\/li>\n<li><strong><a href=\"https:\/\/vibromera.eu\/fi\/glossary\/modal-balancing\/\">modaalinen tasapainotus<\/a><\/strong> Huomioi eksplisiittisesti solmupisteiden sijainnit korjauspainotuksia jaettaessa<\/li>\n<\/ul>\n<h3>Esimerkki: Toisen moodin tasapainotus<\/h3>\n<p>Tarkastellaan pitk\u00e4\u00e4 taipuisaa akselia, joka kulkee ensimm\u00e4isen kriittisen nopeuden yl\u00e4puolella, jolloin toinen moodi k\u00e4ynnistyy:<\/p>\n<ul>\n<li>toisessa moodissa on yksi solmupiste l\u00e4hell\u00e4 j\u00e4nnev\u00e4li\u00e4;<\/li>\n<li>korjauspainon sijoittaminen l\u00e4helle j\u00e4nnev\u00e4li\u00e4 - solmun p\u00e4\u00e4lle - olisi tehotonta;<\/li>\n<li>optimaalinen strategia on sijoittaa korjaukset kahteen antisolmukohtaan, yksi kummallekin puolelle solmupistett\u00e4; ja<\/li>\n<li>painonjakokuvion on vastattava toisen moodin muotoa, jotta tasapainotus toimisi.<\/li>\n<\/ul>\n<h2>4. Anturien sijoittelua koskevat n\u00e4k\u00f6kohdat<\/h2>\n<h3>T\u00e4rin\u00e4n mittausstrategia<\/h3>\n<p>Solmukohdilla on ratkaiseva vaikutus seuraaviin seikkoihin: <a href=\"https:\/\/vibromera.eu\/fi\/glossary\/vibration-monitoring\/\">t\u00e4rin\u00e4nvalvonta<\/a>.<\/p>\n<h4>V\u00e4lt\u00e4 solmukohtia<\/h4>\n<ul>\n<li>solmupisteen anturi havaitsee kyseisen moodin minimaalisen t\u00e4rin\u00e4n;<\/li>\n<li>se voi j\u00e4tt\u00e4\u00e4 huomiotta vakavan t\u00e4rin\u00e4ongelman, jos se on ainoa mittauspiste; ja<\/li>\n<li>Voi antaa v\u00e4\u00e4r\u00e4n kuvan hyv\u00e4ksytt\u00e4vist\u00e4 t\u00e4rin\u00e4tasoista<\/li>\n<\/ul>\n<h4>Antinodien sijaintikohteet<\/h4>\n<ul>\n<li>antisolmut osoittavat suurimman v\u00e4r\u00e4htelyamplitudin;<\/li>\n<li>ne ovat herkimpi\u00e4 kehittyv\u00e4lle ongelmalle;<\/li>\n<li>yksinkertaisesti tuetun roottorin ensimm\u00e4isess\u00e4 moodissa v\u00e4r\u00e4htelymaksimi sijaitsee l\u00e4hell\u00e4 j\u00e4nnev\u00e4lin keskikohtaa (laakerit ovat l\u00e4hell\u00e4 solmukohtia); k\u00e4yt\u00e4nn\u00f6ss\u00e4 konevalvonnassa mitataan silti yleens\u00e4 laakeripesist\u00e4, koska ne ovat saavutettavat ja standardit kiinnityspaikat; ja<\/li>\n<li>korkeammissa moodeissa saatetaan tarvita v\u00e4limittauspisteit\u00e4.<\/li>\n<\/ul>\n<h4>Useita mittauspisteit\u00e4<\/h4>\n<ul>\n<li>Joustavien roottorien tapauksessa mittaa useista aksiaalisista kohdista<\/li>\n<li>n\u00e4in varmistetaan, ettei mit\u00e4\u00e4n moodia j\u00e4tet\u00e4 havaitsematta sen vuoksi, ett\u00e4 anturi sattui sijaitsemaan solmupisteess\u00e4;<\/li>\n<li>sen avulla moodien muodot voidaan m\u00e4\u00e4ritt\u00e4\u00e4 kokeellisesti; ja<\/li>\n<li><a href=\"https:\/\/vibromera.eu\/fi\/glossary\/critical-machinery\/\">kriittiset laitteet<\/a> on usein antureita jokaisessa laakerissa ja j\u00e4nnev\u00e4lien puoliv\u00e4liss\u00e4.<\/li>\n<\/ul>\n<h2>5. Solmupisteiden sijaintien m\u00e4\u00e4ritt\u00e4minen<\/h2>\n<h3>Analyyttinen ennustus<\/h3>\n<ul>\n<li><strong><a href=\"https:\/\/vibromera.eu\/fi\/glossary\/modal-analysis\/\">Finite-elementtianalyysi<\/a>:<\/strong> laskee moodimuodot ja m\u00e4\u00e4ritt\u00e4\u00e4 solmut.<\/li>\n<li><strong>Palkkiteoria:<\/strong> yksinkertaisten kokoonpanojen osalta suljetun muodon ratkaisut ennustavat solmujen sijainnit.<\/li>\n<li><strong>Suunnitteluty\u00f6kalut:<\/strong> rotordynamics-ohjelmisto n\u00e4ytt\u00e4\u00e4 jokaisen moodin muodon visuaalisesti, ja solmut on merkitty.<\/li>\n<\/ul>\n<h3>Kokeellinen tunnistaminen<\/h3>\n<p><strong>1. T\u00f6rm\u00e4ystestaus (bump)<\/strong> - ly\u00f6 akselia useisiin kohtiin instrumentoidulla vasaralla ja mittaa vaste useista pisteist\u00e4; paikka, jossa ei ole vastetta tietyll\u00e4 taajuudella, on kyseisen moodin solmupiste. Tekniikkaa kuvataan yksityiskohtaisesti kohdassa <a href=\"https:\/\/vibromera.eu\/fi\/glossary\/bump-test\/\">t\u00f6rm\u00e4ystestaus<\/a> ja <a href=\"https:\/\/vibromera.eu\/fi\/glossary\/impact-testing\/\">iskuher\u00e4tystestaus<\/a>.<\/p>\n<p><strong>2. K\u00e4ytt\u00f6muodon taipuman ja muodon mittaus<\/strong> - mittaa v\u00e4r\u00e4htely monista aksiaalipisteist\u00e4, piirr\u00e4 taipuma-amplitudi aseman funktiona ja lue nollakohdat solmupisteiksi. T\u00e4m\u00e4 on keskeinen osa <a href=\"https:\/\/vibromera.eu\/fi\/glossary\/ods-analysis\/\">toiminnan taipuman muodon analyysi<\/a>.<\/p>\n<p><strong>3. L\u00e4heisyysanturij\u00e4rjestelm\u00e4t<\/strong> - asentaa useita kosketuksettomia <a href=\"https:\/\/vibromera.eu\/fi\/glossary\/proximity-probe\/\">l\u00e4heisyysanturit<\/a> akselia pitkin ja mitata taipuma suoraan k\u00e4ynnistyksen tai alasajon aikana. <a href=\"https:\/\/vibromera.eu\/fi\/glossary\/coastdown\/\">alasajo<\/a>; t\u00e4m\u00e4 on tarkin kokeellinen menetelm\u00e4 solmujen l\u00f6yt\u00e4miseksi.<\/p>\n<h2>6. Solmupisteet vs. antisolmut<\/h2>\n<p>Solmut ja antisolmut ovat saman kuvan toisiaan t\u00e4ydent\u00e4vi\u00e4 puoliskoja.<\/p>\n<table>\n<tr>\n<th>Solmupisteet<\/th>\n<th>Antinodit<\/th>\n<\/tr>\n<tr>\n<td>Nollataipu\u00adma<\/td>\n<td>Suurin taipuma<\/td>\n<\/tr>\n<tr>\n<td>Suurin taivutuskulma ja j\u00e4nnitys<\/td>\n<td>Nollataivutuskulma<\/td>\n<\/tr>\n<tr>\n<td>Alhainen tehokkuus voiman kohdistamisessa tai mittauksessa<\/td>\n<td>Korjauspainojen maksimaalinen tehokkuus<\/td>\n<\/tr>\n<tr>\n<td>Ihanteellinen tukipaikoille (siirtyv\u00e4n voiman minimointi)<\/td>\n<td>Optimaaliset anturien sijoituspaikat<\/td>\n<\/tr>\n<tr>\n<td>\u2014<\/td>\n<td>Korkein j\u00e4nnitys yhdistetyss\u00e4 kuormituksessa<\/td>\n<\/tr>\n<\/table>\n<h2>7. K\u00e4yt\u00e4nn\u00f6n sovellukset ja tapaustutkimukset<\/h2>\n<h3>Tapaus: Paperikoneen rulla<\/h3>\n<ul>\n<li><strong>Tilanne:<\/strong> pitk\u00e4 (6 metrin) tela, joka py\u00f6rii 1 200 kierrosta minuutissa ja jonka t\u00e4rin\u00e4 on suuri.<\/li>\n<li><strong>Analyysi:<\/strong> se toimi ensimm\u00e4isen kriittisen nopeuden yl\u00e4puolella, jolloin se viritti toisen moodin, jonka solmupiste on j\u00e4nnev\u00e4lin puoliv\u00e4liss\u00e4.<\/li>\n<li><strong>Ensimm\u00e4inen yritys:<\/strong> Painoja lis\u00e4ttiin j\u00e4nnev\u00e4lin puoliv\u00e4liin - sopivaan p\u00e4\u00e4sypaikkaan - huonoin tuloksin.<\/li>\n<li><strong>Ratkaisu:<\/strong> Kun tunnustettiin, ett\u00e4 keskij\u00e4nnev\u00e4li oli solmupiste, painot jaettiin uudelleen nelj\u00e4nnespisteisiin (antisolmupisteisiin).<\/li>\n<li><strong>Tulos:<\/strong> t\u00e4rin\u00e4 laski 85%:ll\u00e4, mik\u00e4 on onnistunut modaalinen tasapaino.<\/li>\n<\/ul>\n<h3>Tapaus: H\u00f6yryturbiinin valvonta<\/h3>\n<ul>\n<li><strong>Tilanne:<\/strong> uusi valvontaj\u00e4rjestelm\u00e4 osoitti v\u00e4h\u00e4ist\u00e4 t\u00e4rin\u00e4\u00e4 tunnetusta ep\u00e4tasapainosta huolimatta.<\/li>\n<li><strong>Tutkinta:<\/strong> anturi oli ep\u00e4huomiossa sijoitettu l\u00e4helle hallitsevan moodin solmupistett\u00e4.<\/li>\n<li><strong>Ratkaisu:<\/strong> lis\u00e4anturit antisolmupisteiss\u00e4 paljastivat todelliset t\u00e4rin\u00e4tasot.<\/li>\n<li><strong>Oppitunti:<\/strong> Ota aina huomioon moodimuodot, kun suunnittelet valvontaj\u00e4rjestelm\u00e4\u00e4.<\/li>\n<\/ul>\n<h2>8. Edistyneet n\u00e4k\u00f6kohdat<\/h2>\n<h3>Liikkuvat solmut<\/h3>\n<p>Joissakin j\u00e4rjestelmiss\u00e4 solmupisteet siirtyv\u00e4t k\u00e4ytt\u00f6olosuhteiden mukaan:<\/p>\n<ul>\n<li>nopeudesta riippuva laakerin j\u00e4ykkyys siirt\u00e4\u00e4 solmukohtien sijainteja;<\/li>\n<li>l\u00e4mp\u00f6tila vaikuttaa akselin j\u00e4ykkyyteen;<\/li>\n<li>vaste voi olla kuormituksesta riippuvainen; ja<\/li>\n<li>Ep\u00e4symmetrisiss\u00e4 j\u00e4rjestelmiss\u00e4 voi olla eri solmukohdat vaaka- ja pystysuuntaista liikett\u00e4 varten.<\/li>\n<\/ul>\n<h3>Arvioidut vs. todelliset solmut<\/h3>\n<ul>\n<li><strong>Todelliset solmut:<\/strong> tarkat nollataipumapisteet idealisoidussa j\u00e4rjestelm\u00e4ss\u00e4.<\/li>\n<li><strong>Likim\u00e4\u00e4r\u00e4iset solmut:<\/strong> hyvin pienen - mutta ei aivan nollan - taipuman sijainnit todellisessa j\u00e4rjestelm\u00e4ss\u00e4, jossa esiintyy <a href=\"https:\/\/vibromera.eu\/fi\/glossary\/damping\/\">vaimennus<\/a> ja muita ep\u00e4ideaalisia vaikutuksia.<\/li>\n<li><strong>K\u00e4yt\u00e4nn\u00f6n seuraus:<\/strong> todellinen solmu on <em>alue<\/em> pienen taipuman eik\u00e4 tarkkaa matemaattista pistett\u00e4.<\/li>\n<\/ul>\n<h2>9. Soveltaminen kent\u00e4ll\u00e4<\/h2>\n<p>Useimpien teollisuuskoneiden - pumppujen, puhaltimien, moottoreiden ja vastaavien - j\u00e4ykkien roottoreiden osalta toimintas\u00e4\u00e4nt\u00f6 on rauhoittavan yksinkertainen: pysy ensimm\u00e4isen kriittisen nopeuden alapuolella, niin hankalat taivutussolmut eiv\u00e4t koskaan tule esiin, joten kaksi roottorin p\u00e4iden l\u00e4hell\u00e4 olevaa korjaustasoa tekev\u00e4t ty\u00f6ns\u00e4. Kannettava kaksikanavainen analysaattori, kuten esim. <a href=\"https:\/\/vibromera.eu\/fi\/tuote\/balanset-1\/\">Balanset-1A<\/a> suorittaa juuri t\u00e4m\u00e4n yhden tai kahden tason <a href=\"https:\/\/vibromera.eu\/fi\/glossary\/kenttatasapaino\/\">kentt\u00e4tasapainotus<\/a> koneen omissa laakereissa, mittaamalla amplitudia ja <a href=\"https:\/\/vibromera.eu\/fi\/glossary\/phase\/\">vaihe<\/a> painojen laskemiseksi. Kun roottorin on kuljettava kriittisen nopeuden l\u00e4pi tai sen yli, analyytikko voi useista akselipisteist\u00e4 otettujen amplitudi- ja vaihetietojen avulla kartoittaa moodin muodon ja varmistaa, mik\u00e4 taso on antisolmu, ennen kuin mit\u00e4\u00e4n painoja sidotaan - t\u00e4m\u00e4 on ero 85%:n parannuksen ja hukkaan heitetyn yrityksen v\u00e4lill\u00e4. Lyhyesti sanottuna solmupisteiden ymm\u00e4rt\u00e4minen muuttaa v\u00e4r\u00e4htelytiedot oikeaksi tasapainotusp\u00e4\u00e4t\u00f6kseksi.<\/p>\n<hr>\n<p><a href=\"https:\/\/vibromera.eu\/fi\/glossary\/\">\u2190 Takaisin p\u00e4\u00e4hakemistoon<\/a><\/p>","protected":false},"excerpt":{"rendered":"<p>Opi solmukohdista, v\u00e4r\u00e4htelev\u00e4n akselin kohdista, joissa taipuma pysyy nollana. N\u00e4m\u00e4 ovat kriittisi\u00e4 moodimuotojen, tasapainotuksen ja anturien sijoittelun ymm\u00e4rt\u00e4miseksi py\u00f6riviss\u00e4 koneissa.<\/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\/fi\/wp-json\/wp\/v2\/glossary\/173","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/vibromera.eu\/fi\/wp-json\/wp\/v2\/glossary"}],"about":[{"href":"https:\/\/vibromera.eu\/fi\/wp-json\/wp\/v2\/types\/glossary"}],"version-history":[{"count":2,"href":"https:\/\/vibromera.eu\/fi\/wp-json\/wp\/v2\/glossary\/173\/revisions"}],"predecessor-version":[{"id":102180,"href":"https:\/\/vibromera.eu\/fi\/wp-json\/wp\/v2\/glossary\/173\/revisions\/102180"}],"wp:attachment":[{"href":"https:\/\/vibromera.eu\/fi\/wp-json\/wp\/v2\/media?parent=173"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/vibromera.eu\/fi\/wp-json\/wp\/v2\/categories?post=173"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/vibromera.eu\/fi\/wp-json\/wp\/v2\/tags?post=173"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}