{"id":160987,"date":"2021-08-03T23:11:59","date_gmt":"2021-08-03T23:11:59","guid":{"rendered":"\/forum\/forums\/topic\/how-to-extract-global-mass-matrix-from-system\/"},"modified":"2021-08-11T18:37:02","modified_gmt":"2021-08-11T18:37:02","slug":"how-to-extract-global-mass-matrix-from-system","status":"closed","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/how-to-extract-global-mass-matrix-from-system\/","title":{"rendered":"How to extract global mass matrix from system?"},"content":{"rendered":"<div class=\"Item-Body\">\n<div class=\"Message userContent\">\n<p>Hello all,<\/p>\n<p><\/p>\n<\/p>\n<p>I am trying to obtain global mass matrix to compare with theoretical cases.<\/p>\n<p>The command I use is:<\/p>\n<p>*DMAT,MatMg,D,IMPORT,FULL,file.full,MASS<\/p>\n<p>*PRINT,MatMg,Mg.matrix<\/p>\n<p><\/p>\n<\/p>\n<p>However the matrix obtained is 138&#215;138 and my model has only 3 nodes and 3 elements, thus expecting a 18&#215;18 matrix.<\/p>\n<div data-embedjson=\"{&quot;url&quot;:&quot;\/forum\/wp-content\/uploads\/forum-uploads\/063\/0THUMPO51XG8.txt&quot;,&quot;name&quot;:&quot;t1.txt&quot;,&quot;type&quot;:&quot;text\/plain&quot;,&quot;size&quot;:1563,&quot;embedType&quot;:&quot;file&quot;}\">\n<a href=\"\/forum\/wp-content\/uploads\/forum-uploads\/063\/0THUMPO51XG8.txt\" download aria-label=\"t1.txt\"><br \/>\nt1.txt<br \/>\n<\/a><\/p>\n","protected":false},"template":"","class_list":["post-160987","topic","type-topic","status-closed","hentry"],"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":["456"],"_bbp_likes_count":["0"],"_bbp_subscription":["256128"],"_bbp_topic_status":["unanswered"],"_bbp_status":["publish"],"_bbp_topic_id":["160987"],"_bbp_forum_id":["27791"],"_bbp_engagement":["20905","182002"],"_bbp_voice_count":["2"],"_bbp_reply_count":["2"],"_bbp_last_reply_id":["187684"],"_bbp_last_active_id":["187684"],"_bbp_last_active_time":["2021-08-11 18:37:02"]},"test":"jhpontes"}],"_links":{"self":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/160987","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\/160987\/revisions"}],"wp:attachment":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/media?parent=160987"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}