{"id":453688,"date":"2026-03-03T21:02:26","date_gmt":"2026-03-03T21:02:26","guid":{"rendered":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/damping-for-spectrum-analysis\/"},"modified":"2026-03-03T21:02:26","modified_gmt":"2026-03-03T21:02:26","slug":"damping-for-spectrum-analysis","status":"publish","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/damping-for-spectrum-analysis\/","title":{"rendered":"Damping for Spectrum Analysis"},"content":{"rendered":"<p>&lt;p&gt;Folks, I&#8217;m trying to understand the role of damping in a spectrum analysis in Mechanical.&nbsp; If the customer provides me a spectrum (Freq. vs. Accel.) that is 5% damped, I would input that to Mechanical.&nbsp; If using CQC or ROSE combination methods, a damping ratio can be set in Analysis Settings (image below).&lt;\/p&gt;&lt;p&gt;<img decoding=\"async\" src=\"https:\/\/innovationspace.ansys.com\/forum\/wp-content\/uploads\/sites\/2\/2026\/03\/03-03-2026-1772571547-mceclip0.png\" \/>&lt;\/p&gt;&lt;p&gt;Is the damping ratio field in the above image supposed to be 0.05 so that it matches the input curve from the customer?&nbsp; Or is the damping ratio field a different value, based on the damping characteristics of the parts being modeled?&lt;\/p&gt;&lt;p&gt;&nbsp;&lt;\/p&gt;<\/p>\n","protected":false},"template":"","class_list":["post-453688","topic","type-topic","status-publish","hentry","topic-tag-damping","topic-tag-response-spectrum-1"],"aioseo_notices":[],"acf":[],"custom_fields":[{"0":{"_bbp_forum_id":["27791"],"_bbp_topic_id":["453688"],"_bbp_subscription":["79744","240"],"_bbp_author_ip":["24.112.251.108"],"_bbp_last_reply_id":["453733"],"_bbp_last_active_id":["453733"],"_bbp_last_active_time":["2026-03-04 16:07:00"],"_bbp_reply_count":["3"],"_bbp_reply_count_hidden":["0"],"_bbp_voice_count":["2"],"_bbp_engagement":["79744","240"],"_btv_view_count":["73"],"_bbp_topic_status":["unanswered"]},"test":"mattprime-engineer-com"}],"_links":{"self":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/453688","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics"}],"about":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/types\/topic"}],"version-history":[{"count":0,"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/453688\/revisions"}],"wp:attachment":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/media?parent=453688"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}