{"id":294506,"date":"2023-07-24T13:20:18","date_gmt":"2023-07-24T13:20:18","guid":{"rendered":"\/forum\/forums\/topic\/pre-stressed-modal-response-spectrum-analysis\/"},"modified":"2023-07-24T13:22:57","modified_gmt":"2023-07-24T13:22:57","slug":"pre-stressed-modal-response-spectrum-analysis","status":"closed","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/pre-stressed-modal-response-spectrum-analysis\/","title":{"rendered":"Pre-stressed modal \/ response spectrum analysis"},"content":{"rendered":"<p>Hello,&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<p>I have been trying to learn to perform response spectrum analysis for preloaded structures using a simple cantilever beam model.<\/p>\n<p>&nbsp;<\/p>\n<p>To understand the affect of pre strees I have applied a point mass at the free end of the beam, which produces a 15mm deflection in a static structural analysis. Having performed modal and response spectrum the maximum deflection in the response spectrum analysis is 2mm. My question is what does this value tell me, is this a maximum displacement from the prestressed deflected position, or is my model setup incorrect?&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<p>Many thanks<\/p>\n","protected":false},"template":"","class_list":["post-294506","topic","type-topic","status-closed","hentry"],"aioseo_notices":[],"acf":[],"custom_fields":[{"0":{"_bbp_subscription":["290034","17821"],"_bbp_author_ip":["168.143.243.14"]," _bbp_last_reply_id":["0"]," _bbp_likes_count":["0"],"_btv_view_count":["390"],"_edit_lock":["1690209427:225107"],"_bbp_topic_status":["unanswered"],"_bbp_status":["publish"],"_bbp_topic_id":["294506"],"_bbp_forum_id":["27796"],"_bbp_engagement":["17821","290034"],"_bbp_voice_count":["2"],"_bbp_reply_count":["1"],"_bbp_last_reply_id":["294654"],"_bbp_last_active_id":["294654"],"_bbp_last_active_time":["2023-07-25 08:38:55"]},"test":"ghgeorge-harveygooglemail-com"}],"_links":{"self":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/294506","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\/294506\/revisions"}],"wp:attachment":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/media?parent=294506"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}