{"id":381712,"date":"2024-09-06T09:06:48","date_gmt":"2024-09-06T09:06:48","guid":{"rendered":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/boundary-conditions-issue-in-mec\/"},"modified":"2024-09-06T09:12:07","modified_gmt":"2024-09-06T09:12:07","slug":"boundary-conditions-issue-in-mec","status":"publish","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/boundary-conditions-issue-in-mec\/","title":{"rendered":"Boundary Conditions Issue in Trans. Struct. for Bearings"},"content":{"rendered":"<p>&lt;p&gt;Hello,&lt;\/p&gt;&lt;p&gt;I have take half part of a single ball in Deep Groove ball bearing to do FSI.&lt;\/p&gt;&lt;p&gt;I have attached the SS below showcasing all the Boundary Condistions Ansys Transient Structural.&lt;\/p&gt;&lt;p&gt;Usually, The inner race rotates alongwith the shaft and so the ball and cage rotates (with lesser RPM) and the outer race is Fixed at the top by the housing. Also, a force is applied on the bottom side of the inner race by the shaft.&nbsp;&lt;\/p&gt;&lt;p&gt;I have applied symmetry conditions.&lt;\/p&gt;&lt;p&gt;But still i am getting an error related to rigid body motion. Can Someone help me out here with the precise B.C.?&lt;\/p&gt;&lt;p&gt;TIA!!&lt;\/p&gt;&lt;p&gt;&nbsp;&lt;\/p&gt;&lt;p&gt;&nbsp;&lt;\/p&gt;&lt;p&gt;&gt;<img decoding=\"async\" src=\"https:\/\/innovationspace.ansys.com\/forum\/wp-content\/uploads\/sites\/2\/2024\/09\/06-09-2024-1725613152-mceclip0.png\" \/>&lt;\/p&gt;&lt;\/p&gt;<\/p>\n","protected":false},"template":"","class_list":["post-381712","topic","type-topic","status-publish","hentry"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 4.9.10 - aioseo.com -->\n\t<meta name=\"description\" content=\"Hello,I have take half part of a single ball in Deep Groove ball bearing to do FSI.I have attached the SS below showcasing all the Boundary Condistions Ansys Transient Structural.Usually, The inner race rotates alongwith the shaft and so the ball and cage rotates (with lesser RPM) and the outer race is Fixed at the\" \/>\n\t<meta name=\"robots\" content=\"max-image-preview:large\" \/>\n\t<link rel=\"canonical\" href=\"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/boundary-conditions-issue-in-mec\/\" \/>\n\t<meta name=\"generator\" content=\"All in One SEO (AIOSEO) 4.9.10\" \/>\n\t\t<meta property=\"og:locale\" content=\"en_US\" \/>\n\t\t<meta property=\"og:site_name\" content=\"Ansys Learning Forum | Ansys Innovation Space\" \/>\n\t\t<meta property=\"og:type\" content=\"article\" \/>\n\t\t<meta property=\"og:title\" content=\"Boundary Conditions Issue in Trans. 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