{"id":164612,"date":"2021-12-06T12:46:52","date_gmt":"2021-12-06T12:46:52","guid":{"rendered":"\/forum\/forums\/topic\/what-is-cumulative-mass-fraction\/"},"modified":"2022-08-24T11:40:52","modified_gmt":"2022-08-24T11:40:52","slug":"what-is-cumulative-mass-fraction","status":"closed","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/what-is-cumulative-mass-fraction\/","title":{"rendered":"what is cumulative mass fraction ?"},"content":{"rendered":"<div class=\"Item-Body\">\n<div class=\"Message userContent\">\n<p> l am doing modal analysis of a cantilever using ANSYS 19.R2, in the result tables (effective mass &amp; participation factor) there is a column called (cumulative mass fraction) , what is cumulative mass fraction and how to be calculated ? .Also when i tried to find the ratio between effective mass to total mass (by dividing effective mass\/total mass) it didn&#039;t match the mentioned ratio in the last column in the case of ROTATION directions (about x,y&amp;z axis), what is wrong with that ?<\/p>\n","protected":false},"template":"","class_list":["post-164612","topic","type-topic","status-closed","hentry","topic-tag-modal-analysis"],"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":["4672"],"_bbp_likes_count":["0"],"_bbp_subscription":["236047"],"_bbp_status":["publish"],"_bbp_topic_status":["unanswered"],"_bbp_topic_id":["164612"],"_bbp_forum_id":["27791"],"_bbp_engagement":["51194","58821"],"_bbp_voice_count":["2"],"_bbp_reply_count":["5"],"_bbp_last_reply_id":["199672"],"_bbp_last_active_id":["199672"],"_bbp_last_active_time":["2021-12-07 12:13:24"]},"test":"md_abdelrhimhotmail-com"}],"_links":{"self":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/164612","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\/164612\/revisions"}],"wp:attachment":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/media?parent=164612"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}