{"id":166842,"date":"2022-03-01T01:22:04","date_gmt":"2022-03-01T01:22:04","guid":{"rendered":"\/forum\/forums\/topic\/force-seems-to-be-applied-in-opposite-direction\/"},"modified":"2022-03-03T08:27:57","modified_gmt":"2022-03-03T08:27:57","slug":"force-seems-to-be-applied-in-opposite-direction","status":"closed","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/force-seems-to-be-applied-in-opposite-direction\/","title":{"rendered":"Force seems to be applied in opposite direction"},"content":{"rendered":"<div class=\"Item-Body\">\n<div class=\"Message userContent\">\n<p>I was getting some odd results trying to run a basic structural simulation and while I&#039;ve been able to sort it out, I can&#039;t figure out why it&#039;s an issue. Any insight would be very appreciated!<\/p>\n<p>The only boundary conditions applied to the system are gravity [0,0,-9.81] m\/s^2 and fixed supports at the top. I added a force to the bottom face [0,0,-802] N. I ran the simulation and checked the reaction forces of the fixed supports and to my surprise, the reaction force is <em>less<\/em> than the combination of the gravity\/mass and the added force. Turns out, it&#039;s exactly <em>double<\/em> the force. I flipped the force direction [0,0,+802] N (but kept gravity the same) and re-ran the simulation. With the reversed loading, the reaction forces balanced as expected. But the force vector that ANSYS displays literally shows it opposing the gravity vector, so I&#039;m very confused about what&#039;s going on. I&#039;ve attached some pictures to show the loading conditions and results.<\/p>\n<p><strong>Loading [0,0,-802] N<\/strong><\/p>\n<div class=\"embedExternal embedImage\">\n<div class=\"embedExternal-content\">\n<a class=\"embedImage-link\" href=\"\/forum\/wp-content\/uploads\/forum-uploads\/520\/RANEOM58YFOU.png\" rel=\"nofollow noopener\" target=\"_blank\"><br \/>\n<img decoding=\"async\" class=\"embedImage-img\" src=\"\/forum\/wp-content\/uploads\/forum-uploads\/520\/RANEOM58YFOU.png\" alt=\"Loading -Z.png\" \/><br \/>\n<\/a><\/p>\n","protected":false},"template":"","class_list":["post-166842","topic","type-topic","status-closed","hentry"],"aioseo_notices":[],"acf":[],"custom_fields":[{"0":{"_btv_view_count":["2563"],"_bbp_likes_count":["0"],"_bbp_subscription":["72500"],"_bbp_topic_status":["unanswered"],"_bbp_status":["publish"],"_bbp_topic_id":["166842"],"_bbp_forum_id":["27791"],"_bbp_engagement":["58821","72500"],"_bbp_voice_count":["2"],"_bbp_reply_count":["5"],"_bbp_last_reply_id":["206977"],"_bbp_last_active_id":["206977"],"_bbp_last_active_time":["2022-03-03 08:27:57"]},"test":"wlaneslac-stanford-edu"}],"_links":{"self":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/166842","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\/166842\/revisions"}],"wp:attachment":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/media?parent=166842"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}