{"id":373923,"date":"2024-07-29T06:50:58","date_gmt":"2024-07-29T06:50:58","guid":{"rendered":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/harmonic-vs-transient-dynamics\/"},"modified":"2024-07-29T06:50:58","modified_gmt":"2024-07-29T06:50:58","slug":"harmonic-vs-transient-dynamics","status":"closed","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/harmonic-vs-transient-dynamics\/","title":{"rendered":"Harmonic vs Transient Dynamics"},"content":{"rendered":"<p>Dear Experts,<\/p>\n<p>I have a clamped beam, first, I try to conduct a modal analysis to extract natural frequencies. Then, around the first natural frequency, I conducted a Harmonic analysis, with a force at the end tip. I got the response spectrum of the end tip displacement. Now, I am trying to conduct a transient dynamic analysis while a simple harmonic force with the same amplitude as the the harmonic and a frequency close to the natural frequncy is applied at the end tip. I expect to get the steady displacement amplitude same as a value on the response spetrum corresponding to the applied frequency. However, they are diffrenet. Would you answer why it happens. Noteworthy to mention that I defined similar damping on both analyses.&nbsp;<\/p>\n<p>Thanks<\/p>\n","protected":false},"template":"","class_list":["post-373923","topic","type-topic","status-closed","hentry"],"aioseo_notices":[],"acf":[],"custom_fields":[{"0":{"_bbp_subscription":["55303","58821"],"_bbp_author_ip":["172.105.0.172"]," _bbp_last_reply_id":["0"],"_btv_view_count":["201"]," _bbp_likes_count":["0"],"_bbp_topic_status":["unanswered"],"_bbp_topic_id":["373923"],"_bbp_forum_id":["27791"],"_bbp_engagement":["55303","58821"],"_bbp_voice_count":["2"],"_bbp_reply_count":["1"],"_bbp_last_reply_id":["373928"],"_bbp_last_active_id":["373928"],"_bbp_last_active_time":["2024-07-29 07:41:54"]},"test":"afshin-taghvaeipourgmail-com"}],"_links":{"self":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/373923","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\/373923\/revisions"}],"wp:attachment":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/media?parent=373923"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}