{"id":239275,"date":"2022-11-01T09:02:27","date_gmt":"2022-11-01T09:02:27","guid":{"rendered":"\/forum\/forums\/topic\/understanding-frequency-response-plots\/"},"modified":"2022-11-01T09:02:27","modified_gmt":"2022-11-01T09:02:27","slug":"understanding-frequency-response-plots","status":"closed","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/understanding-frequency-response-plots\/","title":{"rendered":"Understanding frequency response plots"},"content":{"rendered":"<p>Hello,<\/p>\n<p>below is an image of a post-proccesed frequency reponse plot. Both axis are logarithmic. Analysis type is MSUP and damping is set to 0.1%. I have trouble interpreting parts of this result.<\/p>\n<p>The peaks pointing upwards are from resonance effects. But why have the last three peaks a line pointing downwards? I guess that it is due to damping but why is the line getting longer at higher frequencies? And what about the peaks pointing downwards? Are those frequencies where the structure is not susceptible to vibration?<\/p>\n<p><img decoding=\"async\" src=\"\/forum\/wp-content\/uploads\/sites\/2\/2022\/11\/01-11-2022-1667293127-mceclip0.png\"><\/p>\n<p>It would be great, if someone could help me with my questions.<\/p>\n<p>Thank you!<\/p>\n","protected":false},"template":"","class_list":["post-239275","topic","type-topic","status-closed","hentry","topic-tag-apdl","topic-tag-damping","topic-tag-frequency-response","topic-tag-mode-superposition"],"aioseo_notices":[],"acf":[],"custom_fields":[{"0":{"_bbp_subscription":["182889","1578"],"_bbp_author_ip":["23.56.168.190"]," _bbp_last_reply_id":["0"]," _bbp_likes_count":["0"],"_btv_view_count":["2636"],"_bbp_topic_status":["unanswered"],"_bbp_status":["publish"],"_bbp_topic_id":["239275"],"_bbp_forum_id":["27791"],"_bbp_engagement":["1578","182889"],"_bbp_voice_count":["2"],"_bbp_reply_count":["8"],"_bbp_last_reply_id":["239472"],"_bbp_last_active_id":["239472"],"_bbp_last_active_time":["2022-11-02 12:20:31"]},"test":"waldmeisterswein"}],"_links":{"self":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/239275","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\/239275\/revisions"}],"wp:attachment":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/media?parent=239275"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}