{"id":159554,"date":"2021-06-16T18:42:25","date_gmt":"2021-06-16T18:42:25","guid":{"rendered":"\/forum\/forums\/topic\/modal-analysis-natural-frequency-results-percentage-difference-very-high\/"},"modified":"2021-06-18T15:44:10","modified_gmt":"2021-06-18T15:44:10","slug":"modal-analysis-natural-frequency-results-percentage-difference-very-high","status":"closed","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/modal-analysis-natural-frequency-results-percentage-difference-very-high\/","title":{"rendered":"Modal analysis natural frequency results percentage difference very high"},"content":{"rendered":"<div class=\"Item-Body\">\n<div class=\"Message userContent\">\n<p>i am doing my project using a multi leaf spring. I have done modal analysis to obtain the natural frequency, and i also have done an accurate theoretical calculation to find the natural frequency for first four modes. my issue is that the percentage of difference is very high when i compare theoretical results to FEM ansys results. I am not sure what causes the high percentage difference. i have followed the boundary conditions exactly. but cant get less than 10% percentage of difference most is 30% and more. what might affect my FEM simulation results. for meshing i have done sizing only at 7.5mm<\/p>\n","protected":false},"template":"","class_list":["post-159554","topic","type-topic","status-closed","hentry","topic-tag-boundary-conditions","topic-tag-meshing","topic-tag-modal-analysis","topic-tag-natural-frequency","topic-tag-spring"],"aioseo_notices":[],"acf":[],"custom_fields":[{"0":{"_bbp_author_ip":[""],"_bbp_old_reply_author_name_id":["Anonymous"],"_bbp_old_is_reply_anonymous_id":["false"],"_btv_view_count":["2255"],"_bbp_likes_count":["0"],"_bbp_subscription":["253129"],"_bbp_topic_status":["unanswered"],"_bbp_status":["publish"],"_bbp_topic_id":["159554"],"_bbp_forum_id":["27791"],"_bbp_engagement":["240","58821","179014","180472"],"_bbp_voice_count":["4"],"_bbp_reply_count":["7"],"_bbp_last_reply_id":["182445"],"_bbp_last_active_id":["182445"],"_bbp_last_active_time":["2021-06-18 15:44:10"]},"test":"ahmadsamih1"}],"_links":{"self":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/159554","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\/159554\/revisions"}],"wp:attachment":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/media?parent=159554"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}