{"id":364508,"date":"2024-04-27T08:02:16","date_gmt":"2024-04-27T08:02:16","guid":{"rendered":"\/forum\/forums\/topic\/chassis-frontal-test-errors\/"},"modified":"2024-04-27T08:02:16","modified_gmt":"2024-04-27T08:02:16","slug":"chassis-frontal-test-errors","status":"closed","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/chassis-frontal-test-errors\/","title":{"rendered":"Chassis Frontal Test Errors?"},"content":{"rendered":"<p>#question<br \/>I&#8217;ve been trying to do a frontal force test on a chassis in Ansys mechanical and I keep getting the error:<\/p>\n<p>&#8220;A solver pivot warning or error has been detected in the UX degree of freedom of node (X) located in Chassis Beams\\Beam (Rectangular Tube). This is usually a result of an ill conditioned matrix possibly due to unreasonable material properties, an under constrained model, or contact related issues. Check results carefully. You may select the offending object and\/or geometry via RMB on this warning in the Messages window.&#8221;<\/p>\n<p>I have tried constraining each individual edge (there are 103 edges) and I eventually ran into problems because I don&#8217;t know how to properly constrain the model. Are there resources to learn how to constrain a model like this? (Besides the Youtube videos, I found them rather vague.)<\/p>\n<p>Is there some underlying problem with my model? Or could it possibly be the simple support I put at the edge?<img decoding=\"async\" src=\"\/forum\/wp-content\/uploads\/sites\/2\/2024\/04\/27-04-2024-1714204923-Ansys_Forum_Question_1-min.jpg\" alt=\"\"><\/p>\n","protected":false},"template":"","class_list":["post-364508","topic","type-topic","status-closed","hentry"],"aioseo_notices":[],"acf":[],"custom_fields":[{"0":{"_bbp_subscription":["60272","240"],"_bbp_author_ip":["23.192.127.5"]," _bbp_last_reply_id":["0"]," _bbp_likes_count":["0"],"_btv_view_count":["122"],"_bbp_topic_status":["unanswered"],"_bbp_topic_id":["364508"],"_bbp_forum_id":["27791"],"_bbp_engagement":["240","60272"],"_bbp_voice_count":["2"],"_bbp_reply_count":["2"],"_bbp_last_reply_id":["364596"],"_bbp_last_active_id":["364596"],"_bbp_last_active_time":["2024-04-29 02:01:36"]},"test":"franceshsueh515gmail-com"}],"_links":{"self":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/364508","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\/364508\/revisions"}],"wp:attachment":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/media?parent=364508"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}