{"id":44567,"date":"2020-05-30T11:22:00","date_gmt":"2020-05-30T11:22:00","guid":{"rendered":"\/forum\/forums\/topic\/modal-analysis-11\/"},"modified":"2020-05-30T11:22:00","modified_gmt":"2020-05-30T11:22:00","slug":"modal-analysis-11","status":"closed","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/modal-analysis-11\/","title":{"rendered":"Modal analysis"},"content":{"rendered":"<p>Hello<br \/>\nThis is about a problem which I noticed while doing a modal analysis for finding out natural frequency of the below rollcage in ansys, I observed that for first 6 modes only effective mass participation was observed, also after that there was drastic change in frequency value from 7th mode and effective mass participation became zero.<br \/>\nFor the same structure when I fixed suspension points, it gave me values for all the 10 modes and also effective mass participation was observed.<br \/>\nSo can you please help me to find out reason for the drastic change in values of frequency and the terms mentioned in \u2018Participation Factor Calculation\u2019 table of solution information window. Also should I fix the suspension points for the same analysis and what number of modes I should select.<\/p>\n","protected":false},"template":"","class_list":["post-44567","topic","type-topic","status-closed","hentry","topic-tag-modal-1","topic-tag-ansys","topic-tag-ansys-mechanical","topic-tag-ansys-workbench","topic-tag-modalanalysis-1","topic-tag-structure"],"aioseo_notices":[],"acf":[],"custom_fields":[{"0":{"_bbp_old_topic_id":["16748"],"_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":["2579"],"_bbp_subscription":["251481"],"_bbp_topic_status":["unanswered"],"_bbp_status":["publish"],"_bbp_topic_id":["44567"],"_bbp_forum_id":["27791"],"_bbp_engagement":["240","177328"],"_bbp_voice_count":["2"],"_bbp_reply_count":["7"],"_bbp_last_reply_id":["116288"],"_bbp_last_active_id":["116288"],"_bbp_last_active_time":["2020-06-01 10:17:56"]},"test":"shubham99"}],"_links":{"self":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/44567","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\/44567\/revisions"}],"wp:attachment":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/media?parent=44567"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}