{"id":34608,"date":"2019-04-10T14:47:43","date_gmt":"2019-04-10T14:47:43","guid":{"rendered":"\/forum\/forums\/topic\/damping-in-transient-structural-fea-analysis\/"},"modified":"2019-04-10T14:47:43","modified_gmt":"2019-04-10T14:47:43","slug":"damping-in-transient-structural-fea-analysis","status":"closed","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/damping-in-transient-structural-fea-analysis\/","title":{"rendered":"Damping in Transient Structural FEA Analysis"},"content":{"rendered":"<p>Hello,<\/p>\n<p><\/p>\n<p>I wanted to make a query on the damping factors &alpha; and &beta; that we select, when we decide to add damping in a transient dynamic, harmonic or modal damped analysis. How do we calculate these factors, that related to the mass damping and stiffness damping respectively, based on tests data?<\/p>\n<p><\/p>\n<p>Do we use some values or equations existing in the literature,that includes a material-dependent damping ratio and element damping?<\/p>\n<p><\/p>\n<p>Damping factor alpha, &alpha; is the constant mass matrix multiplier and beta, &beta; is the constant stiffness matrix multiplier in the damping matrix C in ANSYS for vibration damping.<\/p>\n<p><\/p>\n<p>How could I use ALPHAD and BETAD Commands in ANSYS, in case that I can calculate these factors in that way?<\/p>\n<p><\/p>\n<p>I am interested in applying damping in a transient dynamic FEA analysis and specifically for an elastomer material to study.<\/p>\n<p><\/p>\n<p>Thank you.<\/p>\n<p><\/p>\n<p>Kind regards,<\/p>\n<p><\/p>\n<p>FX<\/p>\n","protected":false},"template":"","class_list":["post-34608","topic","type-topic","status-closed","hentry"],"aioseo_notices":[],"acf":[],"custom_fields":[{"0":{"_bbp_old_topic_id":["6780"],"_bbp_old_topic_author_name_id":["Anonymous"],"_bbp_old_is_topic_anonymous_id":["false"],"_bbp_old_closed_status_id":["publish"],"_bbp_author_ip":[null],"_bbp_old_sticky_status_id":["normal"],"_bbp_likes_count":["0","0"],"_btv_view_count":["1914"],"_bbp_topic_status":["unanswered"],"_bbp_status":["publish"],"_bbp_topic_id":["34608"],"_bbp_forum_id":["27791"],"_bbp_engagement":["240","160123"],"_bbp_voice_count":["2"],"_bbp_reply_count":["5"],"_bbp_last_reply_id":["82589"],"_bbp_last_active_id":["82589"],"_bbp_last_active_time":["2019-04-10 21:08:45"]},"test":"fx213"}],"_links":{"self":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/34608","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\/34608\/revisions"}],"wp:attachment":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/media?parent=34608"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}