{"id":39503,"date":"2019-12-09T23:08:18","date_gmt":"2019-12-09T23:08:18","guid":{"rendered":"\/forum\/forums\/topic\/ansys-modal-analysis-soultion-not-matching-test-results\/"},"modified":"2019-12-09T23:08:18","modified_gmt":"2019-12-09T23:08:18","slug":"ansys-modal-analysis-soultion-not-matching-test-results","status":"closed","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/ansys-modal-analysis-soultion-not-matching-test-results\/","title":{"rendered":"Ansys modal analysis soultion not matching test results"},"content":{"rendered":"<p>I have modelled conveyor drives and connecting pulley &amp; structure in ANSYS and used modal analysis to identify natural frequencies in the model. I have obtained a first mode frequency of 7.5 Hz although the actual test results show that it should be 3Hz and the displacement of the system seems to be excessive. I have modelled the geometry as close as possible to provided drawings and ensured that the weights of the components match actual weights. I have checked all contact regions between components, but the first mode shape displacements seem too excessive and the frequency is 7.5 Hz instead of 3Hz.&nbsp;<\/p>\n<p><\/p>\n<p>Does anyone know what may be the reason why the model is not similar to test results?<\/p>\n<p><\/p>\n<p>&nbsp;<\/p>\n","protected":false},"template":"","class_list":["post-39503","topic","type-topic","status-closed","hentry"],"aioseo_notices":[],"acf":[],"custom_fields":[{"0":{"_bbp_old_topic_id":["11682"],"_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"],"_btv_view_count":["4382"],"_bbp_subscription":["245694"],"_bbp_topic_status":["unanswered"],"_bbp_status":["publish"],"_bbp_topic_id":["39503"],"_bbp_forum_id":["27791"],"_bbp_engagement":["240","171219","171357"],"_bbp_voice_count":["3"],"_bbp_reply_count":["17"],"_bbp_last_reply_id":["100634"],"_bbp_last_active_id":["100634"],"_bbp_last_active_time":["2019-12-12 04:26:35"]},"test":"rmaur29"}],"_links":{"self":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/39503","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\/39503\/revisions"}],"wp:attachment":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/media?parent=39503"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}