{"id":87,"date":"2017-07-03T14:34:58","date_gmt":"2017-07-03T14:34:58","guid":{"rendered":"http:\/\/www.dasoluciones.es\/en\/?page_id=87"},"modified":"2017-07-05T08:21:19","modified_gmt":"2017-07-05T08:21:19","slug":"experimental-modal-analysis","status":"publish","type":"page","link":"https:\/\/www.dasoluciones.es\/en\/services\/vibrations-analysis\/experimental-modal-analysis\/","title":{"rendered":"Experimental Modal Analysis"},"content":{"rendered":"<hr>\n<p align=\"justify\"><strong>The aim of modal analysis<\/strong>&nbsp;<strong>in structural mechanics is to determine the natural frequencies,<\/strong>&nbsp;<strong>modes<\/strong>&nbsp;<strong>and parameters such as the vibration damping factor of<\/strong>&nbsp;<strong>a part<\/strong>&nbsp; <strong>and\/or structure during free&nbsp;vibration<em>.<\/em><\/strong>&nbsp;The techniques of modal analysis assume that the system being studied remains invariant over time, and in turn, can be considered a linear system.<\/p>\n<p align=\"justify\">All structures have natural frequencies and a mode of vibration&nbsp; associated with each.&nbsp;These natural frequencies depend on parameters such as the mass of the system, the stiffness or the damping of the system.&nbsp;In the design of machines and structures, it is necessary to identify the natural frequencies to know what the response of the designed element will be when a frequency-driving force acting on it is near to this natural frequency, or simply, what will be the response to the excitation forces that a machine or structure can suffer during its useful life.<\/p>\n<p align=\"justify\"><strong>By means of an<\/strong>&nbsp;<strong><em>Experimental Modal Analysis<\/em><\/strong>&nbsp;<strong>it is possible&nbsp;to&nbsp;determine natural frequencies and vibration modes of&nbsp; machines&nbsp; and structures<\/strong>.&nbsp;The data thus obtained can be used to solve a resonance problem or can serve to feed back a Finite Element Model, allowing for calibration of the model and the hypotheses that were used to create it. In many cases, the results and decisions that are made on the basis of the mathematical models depend on the accuracy of the feedback used in the calculation.<\/p>\n<p align=\"justify\"><strong><em>Modal<\/em><\/strong><strong><em> analysis is efficient means to describe, understand and model the behavior of a structure or machine<\/em><\/strong><em>.<\/em><\/p>\n<p>The following video shows a simulation performed on a fan structure:<\/p>\n<figure id=\"attachment_108\" aria-describedby=\"caption-attachment-108\" style=\"width: 325px\" class=\"wp-caption alignright\"><img loading=\"lazy\" decoding=\"async\" class=\"wp-image-108\" src=\"http:\/\/www.dasoluciones.es\/wp-content\/uploads\/2017\/02\/da-Soluciones-III-300x180.jpg\" alt=\"\" width=\"325\" height=\"195\"><figcaption id=\"caption-attachment-108\" class=\"wp-caption-text\">Fan structure model<\/figcaption><\/figure>\n<p><iframe loading=\"lazy\" src=\"https:\/\/www.youtube.com\/embed\/NUAFebzsR18?rel=0\" width=\"355\" height=\"220\" frameborder=\"3\" align=\"left\" allowfullscreen=\"allowfullscreen\"><\/iframe><\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<hr>\n<p><strong><span style=\"color: #a3322f;\"><a style=\"color: #a3322f;\" href=\"http:\/\/www.dasoluciones.es\/en\/services\/vibrations-analysis\/\"><svg class=\"genericon genericond-genericons-neue genericons-neue-rewind genericond-genericons-neue-1x genericond-rotate-normal\" style=\"fill:#a3322f;\" title=\"rewind\" role=\"img\" aria-labelledby=\"title\"><use xlink:href=\"https:\/\/www.dasoluciones.es\/en\/wp-content\/plugins\/genericond\/\/icons\/genericons-neue\/svg-sprite\/genericons-neue.svg#rewind\" \/><\/svg><\/a><a style=\"color: #a3322f;\" href=\"http:\/\/www.dasoluciones.es\/en\/services\/vibrations-analysis\/\">&nbsp;Back to Vibrations Analysis<\/a><\/span><\/strong><\/p>\n","protected":false},"excerpt":{"rendered":"<p>The aim of modal analysis&nbsp;in structural mechanics is to determine the natural frequencies,&nbsp;modes&nbsp;and parameters such as the vibration damping factor of&nbsp;a part&nbsp; and\/or structure during free&nbsp;vibration.&nbsp;The techniques of modal analysis assume that the system being studied remains invariant over time, and in turn, can be considered a linear system. All structures have natural frequencies and&#8230;<\/p>\n","protected":false},"author":1,"featured_media":0,"parent":51,"menu_order":1,"comment_status":"closed","ping_status":"closed","template":"","meta":{"_monsterinsights_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0,"ngg_post_thumbnail":0,"jetpack_post_was_ever_published":false,"footnotes":""},"class_list":["post-87","page","type-page","status-publish","hentry","archive-entry"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.2 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Experimental Modal Analysis - D&amp;A Solutions<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.dasoluciones.es\/en\/services\/vibrations-analysis\/experimental-modal-analysis\/\" \/>\n<meta property=\"og:locale\" content=\"en_GB\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Experimental Modal Analysis - D&amp;A Solutions\" \/>\n<meta property=\"og:description\" content=\"The aim of modal analysis&nbsp;in structural mechanics is to determine the natural frequencies,&nbsp;modes&nbsp;and parameters such as the vibration damping factor of&nbsp;a part&nbsp; and\/or structure during free&nbsp;vibration.&nbsp;The techniques of modal analysis assume that the system being studied remains invariant over time, and in turn, can be considered a linear system. 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