{"id":392301,"date":"2024-10-31T18:17:03","date_gmt":"2024-10-31T18:17:03","guid":{"rendered":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/prescribed-motion-set_-displacement\/"},"modified":"2024-10-31T18:17:03","modified_gmt":"2024-10-31T18:17:03","slug":"prescribed-motion-set_-displacement","status":"publish","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/prescribed-motion-set_-displacement\/","title":{"rendered":"Prescribed motion set_ displacement"},"content":{"rendered":"<p>&lt;p&gt;Hello everyone&lt;\/p&gt;&lt;p&gt;I am trying to model a column of soil consisting of 100 equal solid elements, where the nodes of each elevation are constarined in all directions of x,y,and z to behave completely in shear. The materials are elastic and all are the same.I also fix he bottom of my column in vertical direction. When I apply prescribed_motion_set at the bottom of the soil column (in x or horizontal direction) and my motion would be displacement, after doing the analysis, the nodout shows significantly crazy values for acceleration at the bottom (where I apply the dispalcement as my input), however, the other nodes have rational acceleration records.&lt;\/p&gt;&lt;p&gt;Does anybody knows what am I missing?&lt;\/p&gt;&lt;p&gt;I am using ls-prepost for my simulation.&lt;\/p&gt;&lt;p&gt;Thanks&lt;\/p&gt;<\/p>\n","protected":false},"template":"","class_list":["post-392301","topic","type-topic","status-publish","hentry","topic-tag-ansys-ls-dyna-1"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 4.9.10 - aioseo.com -->\n\t<meta name=\"description\" content=\"Hello everyoneI am trying to model a column of soil consisting of 100 equal solid elements, where the nodes of each elevation are constarined in all directions of x,y,and z to behave completely in shear. The materials are elastic and all are the same.I also fix he bottom of my column in vertical direction. When\" \/>\n\t<meta name=\"robots\" content=\"max-image-preview:large\" \/>\n\t<link rel=\"canonical\" href=\"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/prescribed-motion-set_-displacement\/\" \/>\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=\"Prescribed motion set_ displacement | Ansys Learning Forum\" \/>\n\t\t<meta property=\"og:description\" content=\"Hello everyoneI am trying to model a column of soil consisting of 100 equal solid elements, where the nodes of each elevation are constarined in all directions of x,y,and z to behave completely in shear. 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