{"id":230,"date":"2025-10-31T00:25:51","date_gmt":"2025-10-31T00:25:51","guid":{"rendered":"https:\/\/vibromera.eu\/glossary\/self-excited-vibration\/"},"modified":"2026-05-23T22:39:08","modified_gmt":"2026-05-23T22:39:08","slug":"self-excited-vibration","status":"publish","type":"glossary","link":"https:\/\/vibromera.eu\/cs\/glossary\/self-excited-vibration\/","title":{"rendered":"Co je to samobuzen\u00e1 vibrace? \u2013 Nestabiln\u00ed odezvy syst\u00e9mu"},"content":{"rendered":"<h1>Pochopen\u00ed samobuzen\u00fdch vibrac\u00ed<\/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\/cs\/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\/cs\/product\/balanset-1\/\" title=\"P\u0159enosn\u00fd vyva\u017eova\u010d a analyz\u00e1tor vibrac\u00ed 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=\"Kompletn\u00ed sada p\u0159enosn\u00e9ho vyva\u017eova\u010de a analyz\u00e1toru vibrac\u00ed Balanset-1A\" 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\/cs\/product-category\/devices\/\" rel=\"tag\">Za\u0159\u00edzen\u00ed<\/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\/cs\/product\/balanset-1\/\" title=\"P\u0159enosn\u00fd vyva\u017eova\u010d a analyz\u00e1tor vibrac\u00ed Balanset-1A\">P\u0159enosn\u00fd vyva\u017eova\u010d a analyz\u00e1tor vibrac\u00ed 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> + DPH (pokud se uplat\u0148uje)<\/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=\"\/cs\/wp-json\/wp\/v2\/glossary\/230?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=\"P\u0159idat do ko\u0161\u00edku\" data-no-translation-title=\"\"><i rel=\"tooltip\" data-original-title=\"P\u0159idat do ko\u0161\u00edku\" 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=\"\/cs\/wp-json\/wp\/v2\/glossary\/230?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=\"P\u0159idat do ko\u0161\u00edku: \u201cPortable balancer &amp; Vibration analyzer Balanset-1A\u201d\" rel=\"nofollow\" data-success_message=\"\u201cPortable balancer &amp; Vibration analyzer Balanset-1A\u201d byl p\u0159id\u00e1n do ko\u0161\u00edku\" data-no-translation=\"\" data-trp-gettext=\"\" data-no-translation-aria-label=\"\" data-no-translation-data-success_message=\"\">P\u0159idat do ko\u0161\u00edku<\/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\/cs\/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\/cs\/product\/vibration-sensor\/\" title=\"Sn\u00edma\u010d vibrac\u00ed\">\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=\"Sn\u00edma\u010d vibrac\u00ed Balanset-1A zbl\u00edzka\" 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\/cs\/product-category\/parts\/\" rel=\"tag\">D\u00edly<\/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\/cs\/product\/vibration-sensor\/\" title=\"Sn\u00edma\u010d vibrac\u00ed\">Sn\u00edma\u010d vibrac\u00ed<\/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> + DPH (pokud se uplat\u0148uje)<\/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=\"\/cs\/wp-json\/wp\/v2\/glossary\/230?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=\"P\u0159idat do ko\u0161\u00edku\" data-no-translation-title=\"\"><i rel=\"tooltip\" data-original-title=\"P\u0159idat do ko\u0161\u00edku\" 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=\"\/cs\/wp-json\/wp\/v2\/glossary\/230?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=\"P\u0159idat do ko\u0161\u00edku: \u201cVibration sensor\u201d\" rel=\"nofollow\" data-success_message=\"\u201cVibration sensor\u201d byl p\u0159id\u00e1n do ko\u0161\u00edku\" data-no-translation=\"\" data-trp-gettext=\"\" data-no-translation-aria-label=\"\" data-no-translation-data-success_message=\"\">P\u0159idat do ko\u0161\u00edku<\/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\/cs\/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\/cs\/product\/optical-sensor-for-balanset-and-arbalance\/\" title=\"Optick\u00fd senzor (laserov\u00fd ot\u00e1\u010dkom\u011br)\">\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=\"Optick\u00fd senzor (laserov\u00fd ot\u00e1\u010dkom\u011br)\" 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\/cs\/product-category\/parts\/\" rel=\"tag\">D\u00edly<\/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\/cs\/product\/optical-sensor-for-balanset-and-arbalance\/\" title=\"Optick\u00fd senzor (laserov\u00fd ot\u00e1\u010dkom\u011br)\">Optick\u00fd senzor (laserov\u00fd ot\u00e1\u010dkom\u011br)<\/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> + DPH (pokud se uplat\u0148uje)<\/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=\"\/cs\/wp-json\/wp\/v2\/glossary\/230?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=\"P\u0159idat do ko\u0161\u00edku\" data-no-translation-title=\"\"><i rel=\"tooltip\" data-original-title=\"P\u0159idat do ko\u0161\u00edku\" 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=\"\/cs\/wp-json\/wp\/v2\/glossary\/230?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=\"P\u0159idat do ko\u0161\u00edku: \u201cOptical Sensor (Laser Tachometer)\u201d\" rel=\"nofollow\" data-success_message=\"\u201cOptical Sensor (Laser Tachometer)\u201d byl p\u0159id\u00e1n do ko\u0161\u00edku\" data-no-translation=\"\" data-trp-gettext=\"\" data-no-translation-aria-label=\"\" data-no-translation-data-success_message=\"\">P\u0159idat do ko\u0161\u00edku<\/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\/cs\/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\/cs\/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=\"Sada pro vyva\u017eov\u00e1n\u00ed rotor\u016f Vibromera: p\u0159epravn\u00ed kuf\u0159\u00edk, v\u00edcekan\u00e1lov\u00fd zesilova\u010d sign\u00e1lu, ru\u010dn\u00ed analyz\u00e1tor, magnetick\u00e1 z\u00e1kladna, vibra\u010dn\u00ed senzory a spir\u00e1lov\u00e9 kabely.\" 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\/cs\/product-category\/devices\/\" rel=\"tag\">Za\u0159\u00edzen\u00ed<\/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\/cs\/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> + DPH (pokud se uplat\u0148uje)<\/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=\"\/cs\/wp-json\/wp\/v2\/glossary\/230?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=\"P\u0159idat do ko\u0161\u00edku\" data-no-translation-title=\"\"><i rel=\"tooltip\" data-original-title=\"P\u0159idat do ko\u0161\u00edku\" 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=\"\/cs\/wp-json\/wp\/v2\/glossary\/230?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=\"P\u0159idat do ko\u0161\u00edku: \u201cBalanset-4\u201d\" rel=\"nofollow\" data-success_message=\"\u201cBalanset-4\u201d byl p\u0159id\u00e1n do ko\u0161\u00edku\" data-no-translation=\"\" data-trp-gettext=\"\" data-no-translation-aria-label=\"\" data-no-translation-data-success_message=\"\">P\u0159idat do ko\u0161\u00edku<\/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\/cs\/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\/cs\/product\/magnet-stand\/\" title=\"Magnetick\u00fd stojan 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=\"Magnetick\u00e1 z\u00e1kladna.\" 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\/cs\/product-category\/parts\/\" rel=\"tag\">D\u00edly<\/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\/cs\/product\/magnet-stand\/\" title=\"Magnetick\u00fd stojan Insize-60 kgf\">Magnetick\u00fd stojan 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> + DPH (pokud se uplat\u0148uje)<\/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=\"\/cs\/wp-json\/wp\/v2\/glossary\/230?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=\"P\u0159idat do ko\u0161\u00edku\" data-no-translation-title=\"\"><i rel=\"tooltip\" data-original-title=\"P\u0159idat do ko\u0161\u00edku\" 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=\"\/cs\/wp-json\/wp\/v2\/glossary\/230?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=\"P\u0159idat do ko\u0161\u00edku: \u201cMagnetic Stand Insize-60-kgf\u201d\" rel=\"nofollow\" data-success_message=\"\u201cMagnetic Stand Insize-60-kgf\u201d byl p\u0159id\u00e1n do ko\u0161\u00edku\" data-no-translation=\"\" data-trp-gettext=\"\" data-no-translation-aria-label=\"\" data-no-translation-data-success_message=\"\">P\u0159idat do ko\u0161\u00edku<\/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\/cs\/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\/cs\/product\/reflective-tape\/\" title=\"Reflexn\u00ed p\u00e1ska\">\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=\"Reflexn\u00ed p\u00e1ska\" 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\/cs\/product-category\/parts\/\" rel=\"tag\">D\u00edly<\/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\/cs\/product\/reflective-tape\/\" title=\"Reflexn\u00ed p\u00e1ska\">Reflexn\u00ed p\u00e1ska<\/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> + DPH (pokud se uplat\u0148uje)<\/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=\"\/cs\/wp-json\/wp\/v2\/glossary\/230?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=\"P\u0159idat do ko\u0161\u00edku\" data-no-translation-title=\"\"><i rel=\"tooltip\" data-original-title=\"P\u0159idat do ko\u0161\u00edku\" 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=\"\/cs\/wp-json\/wp\/v2\/glossary\/230?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=\"P\u0159idat do ko\u0161\u00edku: \u201cReflective tape\u201d\" rel=\"nofollow\" data-success_message=\"\u201cReflective tape\u201d byl p\u0159id\u00e1n do ko\u0161\u00edku\" data-no-translation=\"\" data-trp-gettext=\"\" data-no-translation-aria-label=\"\" data-no-translation-data-success_message=\"\">P\u0159idat do ko\u0161\u00edku<\/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\/cs\/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\/cs\/product\/dynamic-balancer-balanset-1a\/\" title=\"Dynamick\u00fd vyva\u017eova\u010d &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=\"Obsah sady Balanset-1A s jednotkou rozhran\u00ed, senzory, ot\u00e1\u010dkom\u011brem a p\u0159\u00edslu\u0161enstv\u00edm\" 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\/cs\/product-category\/devices\/\" rel=\"tag\">Za\u0159\u00edzen\u00ed<\/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\/cs\/product\/dynamic-balancer-balanset-1a\/\" title=\"Dynamick\u00fd vyva\u017eova\u010d &quot;Balanset-1A&quot; OEM\">Dynamick\u00fd vyva\u017eova\u010d \"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> + DPH (pokud se uplat\u0148uje)<\/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=\"\/cs\/wp-json\/wp\/v2\/glossary\/230?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=\"P\u0159idat do ko\u0161\u00edku\" data-no-translation-title=\"\"><i rel=\"tooltip\" data-original-title=\"P\u0159idat do ko\u0161\u00edku\" 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=\"\/cs\/wp-json\/wp\/v2\/glossary\/230?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=\"P\u0159idat do ko\u0161\u00edku: \u201cDynamic balancer \u201cBalanset-1A\u201d OEM\u201d\" rel=\"nofollow\" data-success_message=\"\u201cDynamic balancer \u201cBalanset-1A\u201d OEM\u201d byl p\u0159id\u00e1n do ko\u0161\u00edku\" data-no-translation=\"\" data-trp-gettext=\"\" data-no-translation-aria-label=\"\" data-no-translation-data-success_message=\"\">P\u0159idat do ko\u0161\u00edku<\/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>Samobuzen\u00e9 vibrace<\/strong> \u2014 naz\u00fdvan\u00e1 tak\u00e9 samovoln\u00e1 nebo nestabiln\u00ed vibrace \u2014 je obzvl\u00e1\u0161t\u011b nebezpe\u010dn\u00fd typ pohybu, p\u0159i kter\u00e9m pohyb syst\u00e9mu generuje s\u00edly, kter\u00e9 tento pohyb udr\u017euj\u00ed nebo zesiluj\u00ed. V\u00fdsledkem je uzav\u0159en\u00e1 zp\u011btnovazebn\u00ed smy\u010dka: vibrace vytv\u00e1\u0159\u00ed vlastn\u00ed hnac\u00ed s\u00edlu, tak\u017ee amplituda m\u016f\u017ee nar\u016fstat, n\u011bkdy a\u017e do katastrofick\u00e9 \u00farovn\u011b, ani\u017e by do\u0161lo k jak\u00e9mukoli zv\u00fd\u0161en\u00ed vn\u011bj\u0161\u00edho buzen\u00ed. Jedn\u00e1 se o mechanismus, kter\u00fd stoj\u00ed za n\u011bkolika z nejob\u00e1van\u011bj\u0161\u00edch nestabilit v <a href=\"https:\/\/vibromera.eu\/cs\/glossary\/rotor-dynamics\/\">dynamika rotoru<\/a>, a jeho v\u010dasn\u00e9 rozpozn\u00e1n\u00ed je kl\u00ed\u010dovou diagnostickou dovednost\u00ed.<\/p>\n<p>To se z\u00e1sadn\u011b li\u0161\u00ed od <a href=\"https:\/\/vibromera.eu\/cs\/glossary\/forced-vibration\/\">vynucen\u00e9 kmit\u00e1n\u00ed<\/a> jako nap\u0159. <a href=\"https:\/\/vibromera.eu\/cs\/glossary\/unbalance\/\">nevyv\u00e1\u017eenost<\/a> nebo <a href=\"https:\/\/vibromera.eu\/cs\/glossary\/misalignment\/\">nesouosost<\/a>, kde jsou vibrace p\u0159\u00edmou a \u00fam\u011brnou odezvou na konkr\u00e9tn\u00ed periodick\u00fd vstup o zn\u00e1m\u00e9 budic\u00ed frekvenci. Zdvojn\u00e1sob\u00edte-li nevyv\u00e1\u017eenost, zdvojn\u00e1sob\u00ed se i odezva; odstran\u00edte-li budic\u00ed sign\u00e1l, vibrace ustanou. V samobud\u00edc\u00edm syst\u00e9mu \u017e\u00e1dn\u00fd takov\u00fd vn\u011bj\u0161\u00ed budic\u00ed sign\u00e1l neexistuje \u2013 pohyb se udr\u017euje s\u00e1m a energie, kter\u00e1 jej poh\u00e1n\u00ed, poch\u00e1z\u00ed ze st\u00e1l\u00e9ho zdroje, jako je rotace, proud\u011bn\u00ed tekutiny nebo \u0159ezac\u00ed proces.<\/p>\n<h2>1. Mechanismus zp\u011btn\u00e9 vazby<\/h2>\n<p>Mechanismus samovzbuditeln\u00fdch kmit\u016f lze popsat jako n\u00e1sleduj\u00edc\u00ed posloupnost:<\/p>\n<ol>\n<li>Syst\u00e9m \u2013 nap\u0159\u00edklad rotor ot\u00e1\u010dej\u00edc\u00ed se ve sv\u00e9m lo\u017eisku \u2013 se nach\u00e1z\u00ed v rovnom\u011brn\u00e9m pohybu.<\/li>\n<li>Mal\u00e9 n\u00e1hodn\u00e9 naru\u0161en\u00ed zp\u016fsob\u00ed nepatrn\u00fd posun nebo zm\u011bnu rychlosti.<\/li>\n<li>Tato zm\u011bna pohybu m\u011bn\u00ed s\u00edly p\u016fsob\u00edc\u00ed na syst\u00e9m \u2013 nap\u0159\u00edklad tlak kapaliny v <a href=\"https:\/\/vibromera.eu\/cs\/glossary\/journal-bearing\/\">kluzn\u00e9 lo\u017eisko<\/a> nebo \u0159ezn\u00e9 s\u00edly p\u016fsob\u00edc\u00ed na n\u00e1stroj.<\/li>\n<li>Z\u00e1sadn\u00ed je, \u017ee tato zm\u011bn\u011bn\u00e1 s\u00edla p\u016fsob\u00ed tak, \u017ee <em>add energy<\/em> do syst\u00e9mu, \u010d\u00edm\u017e se sou\u010d\u00e1st posunula d\u00e1le ve sm\u011bru, kter\u00fdm se ji\u017e pohybovala.<\/li>\n<li>Zv\u00fd\u0161en\u00fd pohyb vyvol\u00e1v\u00e1 je\u0161t\u011b v\u011bt\u0161\u00ed s\u00edlu, kter\u00e1 dod\u00e1v\u00e1 je\u0161t\u011b v\u00edce energie \u2013 a tento cyklus se opakuje.<\/li>\n<\/ol>\n<p>Smy\u010dka zvy\u0161uje amplitudu, dokud ji nezastav\u00ed nelinearity v syst\u00e9mu (nar\u00e1\u017eka rotoru na pevnou p\u0159ek\u00e1\u017eku, t\u011bsn\u011bn\u00ed, kter\u00e9 uzav\u0159e mezeru) nebo dokud nedojde k poru\u0161e. Kl\u00ed\u010dov\u00fdm fyzik\u00e1ln\u00edm poznatkem je energetick\u00e1 bilance: nestabilita vznik\u00e1 v\u017edy, kdy\u017e s\u00edla z\u00e1visl\u00e1 na pohybu dod\u00e1v\u00e1 energii rychleji, ne\u017e syst\u00e9m <a href=\"https:\/\/vibromera.eu\/cs\/glossary\/damping\/\">tlumen\u00ed<\/a> m\u016f\u017ee tuto energii rozpt\u00fdlit. Odpov\u00eddaj\u00edc\u00ed tlumen\u00ed je proto prvn\u00ed lini\u00ed obrany proti samovzbud\u011bn\u00ed.<\/p>\n<h2>2. B\u011b\u017en\u00e9 p\u0159\u00edklady samovzbuditeln\u00fdch kmit\u016f<\/h2>\n<p>N\u011bkolik dob\u0159e zn\u00e1m\u00fdch jev\u016f v diagnostice stroj\u016f p\u0159edstavuje typick\u00e9 p\u0159\u00edklady samovzbuditeln\u00fdch kmit\u016f:<\/p>\n<ul>\n<li><strong><a href=\"https:\/\/vibromera.eu\/cs\/glossary\/oil-whirl\/\">Olejov\u00fd v\u00edr<\/a> a olejov\u00fd v\u00edr:<\/strong> nejb\u011b\u017en\u011bj\u0161\u00ed p\u0159\u00edklady u rota\u010dn\u00edch stroj\u016f. V lo\u017eisku s tekut\u00fdm filmem vtahuje rotuj\u00edc\u00ed h\u0159\u00eddel olej do nosn\u00e9ho kl\u00ednu. Ru\u0161iv\u00fd vliv m\u016f\u017ee zp\u016fsobit, \u017ee se kl\u00edn s\u00e1m za\u010dne ot\u00e1\u010det (v\u00ed\u0159it) kolem lo\u017eiska; tlak vyv\u00edjen\u00fd t\u00edmto v\u00ed\u0159\u00edc\u00edm kl\u00ednem tla\u010d\u00ed na h\u0159\u00eddel, \u010d\u00edm\u017e dod\u00e1v\u00e1 v\u00ed\u0159en\u00ed dal\u0161\u00ed energii. V\u00fdsledn\u00e1 vibrace nevznik\u00e1 p\u0159i provozn\u00edch ot\u00e1\u010dk\u00e1ch, ale p\u0159i <a href=\"https:\/\/vibromera.eu\/cs\/glossary\/sub-synchronous\/\">subsynchronn\u00ed<\/a> frekvence, obvykle 0,42\u20130,48&times; <a href=\"https:\/\/vibromera.eu\/cs\/glossary\/running-speed\/\">provozn\u00ed ot\u00e1\u010dky<\/a>. Pokud se frekvence v\u00edru zv\u00fd\u0161\u00ed tak, \u017ee se shoduje s frekvenc\u00ed rotoru <a href=\"https:\/\/vibromera.eu\/cs\/glossary\/natural-frequency\/\">vlastn\u00ed frekvence<\/a>, p\u0159ilne k n\u011bmu a vyhrot\u00ed se v mnohem n\u00e1siln\u011bj\u0161\u00ed <a href=\"https:\/\/vibromera.eu\/cs\/glossary\/shaft-whip\/\">vibrace<\/a> stav.<\/li>\n<li><strong>Chv\u011bn\u00ed (drn\u010den\u00ed) p\u0159i obr\u00e1b\u011bn\u00ed:<\/strong> P\u0159i soustru\u017een\u00ed nebo fr\u00e9zov\u00e1n\u00ed doch\u00e1z\u00ed k chv\u011bn\u00ed, jakmile za\u010dne \u0159ezac\u00ed n\u00e1stroj vibrovat. Tyto vibrace zp\u016fsobuj\u00ed kol\u00eds\u00e1n\u00ed tlou\u0161\u0165ky t\u0159\u00edsky, co\u017e vede k kol\u00eds\u00e1n\u00ed \u0159ezn\u00e9 s\u00edly, a tato kol\u00edsaj\u00edc\u00ed s\u00edla zase vr\u00e1\u017e\u00ed energii zp\u011bt do vibrac\u00ed n\u00e1stroje \u2013 \u010d\u00edm\u017e se chv\u011bn\u00ed stup\u0148uje do prudk\u00e9ho, samoudr\u017euj\u00edc\u00edho se chv\u011bn\u00ed, kter\u00e9 ni\u010d\u00ed povrchovou \u00fapravu i samotn\u00fd n\u00e1stroj.<\/li>\n<li><strong>Aerodynamick\u00fd flutter:<\/strong> spojen\u00e9 ohybov\u00e9 a torzn\u00ed kmit\u00e1n\u00ed k\u0159\u00eddla letadla (nebo lopatky turb\u00edny), p\u0159i kter\u00e9m pohyb m\u011bn\u00ed aerodynamick\u00fd profil, zm\u011bn\u011bn\u00fd profil ovliv\u0148uje tlak vzduchu a tento zm\u011bn\u011bn\u00fd tlak zase dod\u00e1v\u00e1 energii zp\u011bt do pohybu \u2013 co\u017e vede ke katastrof\u00e1ln\u00edmu selh\u00e1n\u00ed, pokud nen\u00ed tento jev pod kontrolou.<\/li>\n<li><strong><a href=\"https:\/\/vibromera.eu\/cs\/glossary\/rotor-rub\/\">Rotor rubs<\/a>:<\/strong> Jakmile se rotor dotkne pevn\u00e9 \u010d\u00e1sti, t\u0159en\u00ed v m\u00edst\u011b styku rotor lok\u00e1ln\u011b zah\u0159eje a zp\u016fsob\u00ed jeho prohnut\u00ed. Toto prohnut\u00ed zvy\u0161uje t\u0159ec\u00ed s\u00edlu, co\u017e vede k dal\u0161\u00edmu n\u00e1r\u016fstu tepla a prohnut\u00ed, \u010d\u00edm\u017e vznik\u00e1 tepeln\u00e9 zp\u011btnovazebn\u00ed smy\u010dka, kter\u00e1 m\u016f\u017ee vy\u00fastit v zad\u0159en\u00ed.<\/li>\n<\/ul>\n<p>Dal\u0161\u00ed dva p\u0159\u00edbuzn\u00e9 typy poh\u00e1n\u011bn\u00e9 kapalinou, o kter\u00fdch stoj\u00ed za to v\u011bd\u011bt, jsou <a href=\"https:\/\/vibromera.eu\/cs\/glossary\/steam-whirl\/\">parn\u00ed v\u00edr<\/a> v turb\u00edn\u00e1ch a v \u0161ir\u0161\u00ed skupin\u011b nestabilit vyvolan\u00fdch proud\u011bn\u00edm, kter\u00e9 jsou zp\u016fsobeny <a href=\"https:\/\/vibromera.eu\/cs\/glossary\/aerodynamic-forces\/\">aerodynamick\u00e9 s\u00edly<\/a>, p\u0159i\u010dem\u017e oba funguj\u00ed na stejn\u00e9m principu energetick\u00e9 zp\u011btn\u00e9 vazby.<\/p>\n<h2>3. Vlastn\u011b a vynucen\u00e9 vibrace \u2013 pohled na prvn\u00ed pohled<\/h2>\n<table border=\"1\" style=\"width:100%; border-collapse:collapse;\">\n<tr>\n<th>Trait<\/th>\n<th>Vynucen\u00e9 vibrace<\/th>\n<th>Samobuzen\u00e9 vibrace<\/th>\n<\/tr>\n<tr>\n<td>Frekvence bud\u00edc\u00ed s\u00edly<\/td>\n<td>Nastaven\u00ed pomoc\u00ed extern\u00edho vstupu (nap\u0159. 1\u00d7 pro nevyv\u00e1\u017eenost)<\/td>\n<td>Nastavuje jej samotn\u00fd syst\u00e9m, \u010dasto se jedn\u00e1 o vlastn\u00ed frekvenci<\/td>\n<\/tr>\n<tr>\n<td>Frekvence versus rychlost<\/td>\n<td>Sleduje rychlost b\u011bhu<\/td>\n<td>\u010casto b\u011b\u017e\u00ed pod synchronn\u00ed frekvenc\u00ed a nesleduje 1&times;<\/td>\n<\/tr>\n<tr>\n<td>Chov\u00e1n\u00ed amplitudy<\/td>\n<td>Stabiln\u00ed, \u00fam\u011brn\u00e9 s\u00edle<\/td>\n<td>M\u016f\u017ee r\u016fst bez omezen\u00ed, dokud do toho nevstoup\u00ed nelinearita<\/td>\n<\/tr>\n<tr>\n<td>Energy source<\/td>\n<td>Periodick\u00e1 vn\u011bj\u0161\u00ed s\u00edla<\/td>\n<td>St\u00e1l\u00fd zdroj (rotace, proud\u011bn\u00ed, \u0159ez\u00e1n\u00ed) vyu\u017e\u00edvan\u00fd pohybem<\/td>\n<\/tr>\n<\/table>\n<h2>4. Kl\u00ed\u010dov\u00e9 charakteristiky a diagnostika<\/h2>\n<p>Vlastn\u00ed kmit\u00e1n\u00ed maj\u00ed tendenci zanech\u00e1vat charakteristick\u00e9 stopy v <a href=\"https:\/\/vibromera.eu\/cs\/glossary\/spectrum\/\">Spektrum FFT<\/a>:<\/p>\n<ul>\n<li><strong>Nesynchronn\u00ed frekvence:<\/strong> Vibrace obvykle nejsou celo\u010d\u00edseln\u00fdm n\u00e1sobkem ani harmonick\u00fdmi ot\u00e1\u010dkami. Obvykle se vyskytuj\u00ed na podsynchronn\u00ed frekvenci.<\/li>\n<li><strong>Nestabilita:<\/strong> Amplituda m\u016f\u017ee b\u00fdt velmi kol\u00edsav\u00e1 a m\u016f\u017ee prudce stoupat ji\u017e p\u0159i mal\u00fdch zm\u011bn\u00e1ch rychlosti, teploty nebo zat\u00ed\u017een\u00ed.<\/li>\n<li><strong>Sudden onset:<\/strong> vibrace se nemus\u00ed v\u016fbec projevit, dokud stroj nep\u0159ekro\u010d\u00ed ur\u010ditou mezn\u00ed hodnotu ot\u00e1\u010dek nebo zat\u00ed\u017een\u00ed \u2013 \u010dasto souvisej\u00edc\u00ed s <a href=\"https:\/\/vibromera.eu\/cs\/glossary\/critical-speed\/\">kritick\u00e1 rychlost<\/a> \u2014 v tom okam\u017eiku se n\u00e1hle objev\u00ed s velkou amplitudou.<\/li>\n<\/ul>\n<p>Diagnostika spo\u010d\u00edv\u00e1 v identifikaci t\u011bchto charakteristick\u00fdch nesynchronn\u00edch \u0161pi\u010dek a n\u00e1sledn\u00e9m odvozen\u00ed fyzik\u00e1ln\u00edho mechanismu, kter\u00fd by mohl v dan\u00e9m stroji takovou nestabilitu vyvolat. Jeliko\u017e vznik tohoto jevu souvis\u00ed s provozn\u00edmi podm\u00ednkami, je zvl\u00e1\u0161t\u011b p\u0159\u00ednosn\u00fd z\u00e1znam s prom\u011bnnou ot\u00e1\u010dkou: a <a href=\"https:\/\/vibromera.eu\/cs\/glossary\/cascade-plot\/\">kask\u00e1dov\u00fd graf<\/a> Z\u00e1znam po\u0159\u00edzen\u00fd b\u011bhem rozb\u011bhu nebo dojezdu ukazuje, jak se objevuje subsynchronn\u00ed slo\u017eka, kter\u00e1 se n\u00e1sledn\u011b ust\u00e1l\u00ed na vlastn\u00ed frekvenci, co\u017e je nezam\u011bniteln\u00fd znak p\u0159echodu v\u00ed\u0159en\u00ed do \u0161leh\u00e1n\u00ed. U p\u0159\u00edpad\u016f souvisej\u00edc\u00edch s lo\u017eisky <a href=\"https:\/\/vibromera.eu\/cs\/calculators\/journal-bearing-frequencies\/\">Kalkul\u00e1tor \u010detnosti z\u00e1vad lo\u017eisek<\/a> pom\u00e1h\u00e1 ov\u011b\u0159it, zda se podez\u0159el\u00fd p\u00edk nach\u00e1z\u00ed v p\u00e1smu olejov\u00e9ho v\u00edru. Souhrnn\u00fd term\u00edn pro tento jev je <a href=\"https:\/\/vibromera.eu\/cs\/glossary\/rotor-instability\/\">nestabilita rotoru<\/a>\u2026 a odli\u0161en\u00ed tohoto jevu od vynucen\u00e9 odezvy p\u0159edstavuje pro analytika prvn\u00ed a nejd\u016fle\u017eit\u011bj\u0161\u00ed rozhodovac\u00ed bod \u2013 proto\u017ee \u0159e\u0161en\u00ed je zcela odli\u0161n\u00e9: vynucen\u00e9 kmit\u00e1n\u00ed se omezuje vyv\u00e1\u017een\u00edm nebo se\u0159\u00edzen\u00edm, zat\u00edmco samovoln\u011b vyvolanou nestabilitu je t\u0159eba odstranit ji\u017e ve f\u00e1zi n\u00e1vrhu zm\u011bnou geometrie lo\u017eiska, v\u016fle, zat\u00ed\u017een\u00ed nebo tlumen\u00ed.<\/p>\n<h2>5. Pro\u010d to nelze vyv\u00e1\u017eit<\/h2>\n<p>Z fyzik\u00e1ln\u00edch z\u00e1kon\u016f vypl\u00fdv\u00e1 jedno praktick\u00e9 varov\u00e1n\u00ed. Jeliko\u017e se u samovoln\u00fdch kmit\u016f nejedn\u00e1 o reakci na rotuj\u00edc\u00ed nerovnom\u011brnou hmotnost, nelze je odstranit p\u0159id\u00e1n\u00edm vyva\u017eovac\u00edch z\u00e1va\u017e\u00ed \u2013 energii toti\u017e dod\u00e1v\u00e1 lo\u017eiskov\u00e1 kapalina, \u0159ezac\u00ed proces nebo proud\u011bn\u00ed vzduchu, nikoli nerovnov\u00e1ha hmotnosti. Pr\u00e1v\u011b proto je p\u0159ed jak\u00fdmkoli n\u00e1pravn\u00fdm z\u00e1sahem d\u016fle\u017eit\u00e9 prov\u00e9st pe\u010dliv\u00e9 m\u011b\u0159en\u00ed v ter\u00e9nu: kdy\u017e technik zaznamen\u00e1 amplitudu a f\u00e1zi pomoc\u00ed p\u0159enosn\u00e9ho dvoukan\u00e1lov\u00e9ho analyz\u00e1toru, jako je nap\u0159\u00edklad <a href=\"https:\/\/vibromera.eu\/cs\/produkt\/balanset-1\/\">Balanset-1A<\/a>, stabiln\u00ed a opakovateln\u00e1 slo\u017eka 1&times; nazna\u010duje skute\u010dn\u00fd probl\u00e9m s vyv\u00e1\u017een\u00edm, zat\u00edmco kol\u00edsaj\u00edc\u00ed, subsynchronn\u00ed a neopakovateln\u00e1 slo\u017eka je varovn\u00fdm sign\u00e1lem, \u017ee z\u00e1vada spo\u010d\u00edv\u00e1 v nestabilit\u011b a \u017ee vyva\u017eov\u00e1n\u00ed by bylo zbyte\u010dn\u00e9. Z anal\u00fdzy <a href=\"https:\/\/vibromera.eu\/cs\/glossary\/vibration-analyzer\/\">analyser<\/a> spr\u00e1vn\u011b tak zabra\u0148uje klasick\u00e9 chyb\u011b, kdy se sna\u017e\u00edme vyv\u00e1\u017eit <a href=\"https:\/\/vibromera.eu\/cs\/glossary\/whirl\/\">v\u00edr<\/a>.<\/p>\n<hr>\n<p><a href=\"https:\/\/vibromera.eu\/cs\/glossary\/\">\u2190 Zp\u011bt na hlavn\u00ed index<\/a><\/p>","protected":false},"excerpt":{"rendered":"<p>Vysv\u011btlen\u00ed samobuzen\u00fdch vibrac\u00ed, co\u017e je nebezpe\u010dn\u00fd typ vibrac\u00ed, kde samotn\u00fd pohyb vytv\u00e1\u0159\u00ed s\u00edly, kter\u00e9 vibrace udr\u017euj\u00ed nebo zesiluj\u00ed, jako je nap\u0159\u00edklad v\u00ed\u0159en\u00ed oleje a chv\u011bn\u00ed.<\/p>","protected":false},"featured_media":0,"template":"","meta":{"ai_generated_summary":"","footnotes":""},"categories":[109,110],"tags":[],"class_list":["post-230","glossary","type-glossary","status-publish","hentry","category-glossary","category-vibration-diagnostics"],"_links":{"self":[{"href":"https:\/\/vibromera.eu\/cs\/wp-json\/wp\/v2\/glossary\/230","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/vibromera.eu\/cs\/wp-json\/wp\/v2\/glossary"}],"about":[{"href":"https:\/\/vibromera.eu\/cs\/wp-json\/wp\/v2\/types\/glossary"}],"version-history":[{"count":1,"href":"https:\/\/vibromera.eu\/cs\/wp-json\/wp\/v2\/glossary\/230\/revisions"}],"predecessor-version":[{"id":101308,"href":"https:\/\/vibromera.eu\/cs\/wp-json\/wp\/v2\/glossary\/230\/revisions\/101308"}],"wp:attachment":[{"href":"https:\/\/vibromera.eu\/cs\/wp-json\/wp\/v2\/media?parent=230"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/vibromera.eu\/cs\/wp-json\/wp\/v2\/categories?post=230"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/vibromera.eu\/cs\/wp-json\/wp\/v2\/tags?post=230"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}