{"id":238193,"date":"2022-10-20T06:41:29","date_gmt":"2022-10-20T06:41:29","guid":{"rendered":"\/forum\/forums\/topic\/rigid-body-dynamics-simulation-of-torsion-bar\/"},"modified":"2022-10-20T06:41:29","modified_gmt":"2022-10-20T06:41:29","slug":"rigid-body-dynamics-simulation-of-torsion-bar","status":"closed","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/rigid-body-dynamics-simulation-of-torsion-bar\/","title":{"rendered":"Rigid Body Dynamics Simulation of torsion bar"},"content":{"rendered":"

Hi, I’m trying to conduct a simulation on a mechanical system with a single flexible part. I have tried simplifying it (Geometry and system) as much as possible but I am having issue with achieving the desired motion.<\/p>\n

Basically I’m loading parts on 2 sides of a bar and want it to deform the bar to a certain point.<\/p>\n

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I have tried both remote displacement and remote force load neither work. I also can’t use fixed as condensed geometry doesn’t let me apply loads. Those 2 cuts on the bar are cylindrical supports and the rest of the parts are meant to be fixed relative to eachother.<\/p>\n

 <\/p>\n

For the full system attempt<\/h3>\n

A remote force load is applied on both free mounting points with 1 dampers (no spring rate just damping) and 1 spring\/damper:<\/p>\n

<\/p>\n

Fixed joints were used for all parts that are bolted\/fixed together.<\/p>\n

<\/p>\n

A spherical joints was used for the rod ends<\/p>\n

<\/p>\n

and cylindrical body-ground for the mounting points<\/p>\n

<\/p>\n

This resulted in equivalent stress being insanely low and playthrough shows the parts connected to the part not moving at all.<\/p>\n

<\/p>\n

 <\/p>\n

 <\/p>\n

Are fixed joints the way to go here? My impression is that they are for fixing things relative to each other but in the sims it seemed to be fixing the condensed geometry in space.<\/p>\n

 <\/p>\n","protected":false},"template":"","class_list":["post-238193","topic","type-topic","status-closed","hentry","topic-tag-ANSYSTransient-1","topic-tag-help-rigiddynamics-1","topic-tag-rigid-body-dynamics","topic-tag-rigid-dynamics"],"aioseo_notices":[],"acf":[],"custom_fields":[{"0":{"_bbp_subscription":["262310","240"],"_bbp_author_ip":["23.220.96.181"]," _bbp_last_reply_id":["0"]," _bbp_likes_count":["0"],"_btv_view_count":["820"],"_bbp_topic_status":["unanswered"],"_bbp_status":["publish"],"_bbp_topic_id":["238193"],"_bbp_forum_id":["27791"],"_bbp_engagement":["240","262310"],"_bbp_voice_count":["2"],"_bbp_reply_count":["2"],"_bbp_last_reply_id":["238554"],"_bbp_last_active_id":["238554"],"_bbp_last_active_time":["2022-10-24 20:43:19"]},"test":"n10234586qut-edu-au"}],"_links":{"self":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/238193","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\/238193\/revisions"}],"wp:attachment":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/media?parent=238193"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}