{"id":370891,"date":"2024-07-06T16:38:14","date_gmt":"2024-07-06T16:38:14","guid":{"rendered":"https:\/\/innovationspace.ansys.com\/forum\/forums\/reply\/370891\/"},"modified":"2024-07-06T16:38:14","modified_gmt":"2024-07-06T16:38:14","slug":"370891","status":"publish","type":"reply","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/reply\/370891\/","title":{"rendered":"Reply To: Loss factor define for COMBIN14 in damped modal analysis don&#8217;t affect results"},"content":{"rendered":"<p>&lt;p&gt;The term loss factor isn&#8217;t used to describe any of the types of damping for COMBIN14, which are the real constants cv1 and cv2 and the material properties betd, dmpr and dmps.&nbsp; These types of damping should all have affected the damped natural frequency, except possibly dmpr, based on Table 1.3 in the Structural Analysis Guide.&nbsp; The input below tests a large value of the material property betd on the damped natural frequency.&lt;\/p&gt;&lt;p&gt;\/prep7&lt;br&gt;et,1,14&lt;br&gt;r,1,10000&lt;br&gt;mp,betd,1,.01&lt;\/p&gt;&lt;p&gt;et,2,21,,,2&lt;br&gt;r,2,1&lt;\/p&gt;&lt;p&gt;n,1&lt;br&gt;n,2,1&lt;br&gt;e,1,2&lt;\/p&gt;&lt;p&gt;type,2&lt;br&gt;real,2&lt;br&gt;mat,2&lt;br&gt;e,2&lt;\/p&gt;&lt;p&gt;d,1,all&lt;br&gt;d,2,uy&lt;br&gt;d,2,uz&lt;\/p&gt;&lt;p&gt;fini&lt;\/p&gt;&lt;p&gt;\/solu&lt;br&gt;antyp,modal&lt;br&gt;modop,damp,2&lt;br&gt;mxpand,2,,,yes&lt;br&gt;solve&lt;br&gt;fini&lt;\/p&gt;<\/p>\n","protected":false},"template":"","class_list":["post-370891","reply","type-reply","status-publish","hentry"],"aioseo_notices":[],"acf":[],"_links":{"self":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/replies\/370891","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/replies"}],"about":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/types\/reply"}],"version-history":[{"count":0,"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/replies\/370891\/revisions"}],"wp:attachment":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/media?parent=370891"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}