{"id":289720,"date":"2023-06-21T09:59:34","date_gmt":"2023-06-21T09:59:34","guid":{"rendered":"\/forum\/forums\/topic\/how-many-modes-to-extract\/"},"modified":"2023-06-21T09:59:34","modified_gmt":"2023-06-21T09:59:34","slug":"how-many-modes-to-extract","status":"closed","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/how-many-modes-to-extract\/","title":{"rendered":"How Many Modes to extract ?"},"content":{"rendered":"

As from the ansys innovation course i found the answer for this as below<\/p>\n

    \n
  1. 1.5 times to highest frequency it is exposed to<\/li>\n
  2. Ratio of effective mass to total mass should be equal to 90% or more<\/li>\n<\/ol>\n

    I have followed this guidelines but in my case in one of the direction the ratio of effective mass to total mass is not getting even 50% , for other two direction i am getting almost 80%. Now my question is how many modes i should extract bcz even if i am increasing it will just increase resut file size. I searched for the method like residual vector but this only works in transient not in random vibration, Please help<\/p>\n","protected":false},"template":"","class_list":["post-289720","topic","type-topic","status-closed","hentry"],"aioseo_notices":[],"acf":[],"custom_fields":[{"0":{"_bbp_subscription":["284329","13386","240"],"_bbp_author_ip":["23.217.200.71"]," _bbp_last_reply_id":["0"]," _bbp_likes_count":["0"],"_btv_view_count":["1200"],"_edit_lock":["1687354380:220423"],"_bbp_topic_status":["unanswered"],"_bbp_status":["publish"],"_bbp_topic_id":["289720"],"_bbp_forum_id":["27791"],"_bbp_engagement":["240","13386","284329"],"_bbp_voice_count":["3"],"_bbp_reply_count":["7"],"_bbp_last_reply_id":["290103"],"_bbp_last_active_id":["290103"],"_bbp_last_active_time":["2023-06-23 14:40:28"]},"test":"balaji-bpcoreel-com"}],"_links":{"self":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/289720","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\/289720\/revisions"}],"wp:attachment":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/media?parent=289720"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}