{"id":198210,"date":"2021-11-22T22:20:35","date_gmt":"2021-11-22T22:20:35","guid":{"rendered":"\/forum\/forums\/reply\/198210\/"},"modified":"2021-11-22T22:21:15","modified_gmt":"2021-11-22T22:21:15","slug":"198210","status":"publish","type":"reply","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/reply\/198210\/","title":{"rendered":"Reply To: Damping consideration in ANSYS."},"content":{"rendered":"<p>You have to increase mass or reduce stiffness or both in order to bring the 8 Hz down to 1.66 Hz.  There is no such thing as artificial mass. It sounds like the author needed to add mass to get the model to match the experiment.<br \/>\nDo you have mode shapes for the first three frequencies you opened with?  Because you will want to tune the model to have modes as close as possible to the other two frequencies as well&#8230;<\/p>\n","protected":false},"template":"","class_list":["post-198210","reply","type-reply","status-publish","hentry"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 4.9.10 - aioseo.com -->\n\t<meta name=\"description\" content=\"You have to increase mass or reduce stiffness or both in order to bring the 8 Hz down to 1.66 Hz. There is no such thing as artificial mass. It sounds like the author needed to add mass to get the model to match the experiment. Do you have mode shapes for the first three\" \/>\n\t<meta name=\"robots\" content=\"max-image-preview:large\" \/>\n\t<link rel=\"canonical\" href=\"https:\/\/innovationspace.ansys.com\/forum\/forums\/reply\/198210\/\" \/>\n\t<meta name=\"generator\" content=\"All in One SEO (AIOSEO) 4.9.10\" \/>\n\t\t<meta property=\"og:locale\" content=\"en_US\" \/>\n\t\t<meta property=\"og:site_name\" content=\"Ansys Learning Forum | Ansys Innovation Space\" \/>\n\t\t<meta property=\"og:type\" content=\"article\" \/>\n\t\t<meta property=\"og:title\" content=\"Reply To: Damping consideration in ANSYS. | Ansys Learning Forum\" \/>\n\t\t<meta property=\"og:description\" content=\"You have to increase mass or reduce stiffness or both in order to bring the 8 Hz down to 1.66 Hz. There is no such thing as artificial mass. It sounds like the author needed to add mass to get the model to match the experiment. Do you have mode shapes for the first three\" \/>\n\t\t<meta property=\"og:url\" content=\"https:\/\/innovationspace.ansys.com\/forum\/forums\/reply\/198210\/\" \/>\n\t\t<meta property=\"article:published_time\" content=\"2021-11-22T22:20:35+00:00\" \/>\n\t\t<meta property=\"article:modified_time\" content=\"2021-11-22T22:21:15+00:00\" \/>\n\t\t<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n\t\t<meta name=\"twitter:title\" content=\"Reply To: Damping consideration in ANSYS. | Ansys Learning Forum\" \/>\n\t\t<meta name=\"twitter:description\" content=\"You have to increase mass or reduce stiffness or both in order to bring the 8 Hz down to 1.66 Hz. There is no such thing as artificial mass. It sounds like the author needed to add mass to get the model to match the experiment. Do you have mode shapes for the first three\" \/>\n\t\t<script type=\"application\/ld+json\" class=\"aioseo-schema\">\n\t\t\t{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum\\\/forums\\\/reply\\\/198210\\\/#breadcrumblist\",\"itemListElement\":[{\"@type\":\"ListItem\",\"@id\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum#listItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum\",\"nextItem\":{\"@type\":\"ListItem\",\"@id\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum\\\/forums\\\/reply\\\/198210\\\/#listItem\",\"name\":\"Reply To: Damping consideration in ANSYS.\"}},{\"@type\":\"ListItem\",\"@id\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum\\\/forums\\\/reply\\\/198210\\\/#listItem\",\"position\":2,\"name\":\"Reply To: Damping consideration in ANSYS.\",\"previousItem\":{\"@type\":\"ListItem\",\"@id\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum#listItem\",\"name\":\"Home\"}}]},{\"@type\":\"Organization\",\"@id\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum\\\/#organization\",\"name\":\"Ansys Learning Forum\",\"description\":\"Ansys Innovation Space\",\"url\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum\\\/\"},{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum\\\/forums\\\/reply\\\/198210\\\/#webpage\",\"url\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum\\\/forums\\\/reply\\\/198210\\\/\",\"name\":\"Reply To: Damping consideration in ANSYS. | Ansys Learning Forum\",\"description\":\"You have to increase mass or reduce stiffness or both in order to bring the 8 Hz down to 1.66 Hz. 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