{"id":396039,"date":"2024-12-03T08:39:29","date_gmt":"2024-12-03T08:39:29","guid":{"rendered":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/remote-point-and-thermal-condition-thermal-expansion\/"},"modified":"2024-12-03T08:39:29","modified_gmt":"2024-12-03T08:39:29","slug":"remote-point-and-thermal-condition-thermal-expansion","status":"publish","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/remote-point-and-thermal-condition-thermal-expansion\/","title":{"rendered":"Remote point and thermal condition (thermal expansion)"},"content":{"rendered":"<p>&lt;p&gt;Hi everyone!&lt;\/p&gt;&lt;p&gt;I&#8217;m trying to emulate the presence of a solid body (a precision stage in a measurement system) both in structural (thermal condition) and modal analysis.&nbsp;&lt;br&gt;My idea is to associate a remote point in the COG of the body I&#8217;m emulating and scoping it to the surfaces the body is jointed to. A point mass is then associated with this remote point to embody its inertial properties.&lt;br&gt;The remote point behavior is set to &#8220;beam&#8221; so that the material&#8217;s thermal properties can be selected.&lt;br&gt;As an example, I set up this scenario:&nbsp;&lt;\/p&gt;&lt;p&gt;<img decoding=\"async\" src=\"https:\/\/innovationspace.ansys.com\/forum\/wp-content\/uploads\/sites\/2\/2024\/12\/03-12-2024-1733214715-mceclip0.png\" \/>&lt;\/p&gt;&lt;p&gt;However, the real expected deformation should be about 13.2&micro;m instead of the resulting 6.8&micro;m, as well as the stress should be null:&lt;\/p&gt;&lt;p&gt;<img decoding=\"async\" src=\"https:\/\/innovationspace.ansys.com\/forum\/wp-content\/uploads\/sites\/2\/2024\/12\/03-12-2024-1733214800-mceclip1.png\" \/>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; <img decoding=\"async\" src=\"https:\/\/innovationspace.ansys.com\/forum\/wp-content\/uploads\/sites\/2\/2024\/12\/03-12-2024-1733214809-mceclip2.png\" \/>&lt;\/p&gt;&lt;p&gt;Hence I suppose that the constraint equations of the remote point are not properly defined.&lt;\/p&gt;&lt;p&gt;I already tried inserting an APDL command in the analysis using commands such as <em>d, all, ux<\/em> or <em>ddele, all, ux<\/em> etc but it didn&#8217;t work.&lt;\/p&gt;&lt;p&gt;Please help me fix this setup or suggest a better approach for my needs.&nbsp;&lt;\/p&gt;&lt;p&gt;Thank you,&nbsp;&lt;br&gt;Simone&lt;\/p&gt;&lt;p&gt;&nbsp;&lt;\/p&gt;&lt;p&gt;&nbsp;&lt;\/p&gt;&lt;p&gt;&nbsp;&lt;\/p&gt;<\/p>\n","protected":false},"template":"","class_list":["post-396039","topic","type-topic","status-publish","hentry","topic-tag-ansysstructuresolveIssue-1","topic-tag-APDLthermal-1","topic-tag-constraint-issue","topic-tag-remote-point"],"aioseo_notices":[],"acf":[],"custom_fields":[{"0":{"_bbp_forum_id":["27796"],"_bbp_topic_id":["396039"],"_bbp_subscription":["444240","20905"],"_bbp_author_ip":["192.167.39.98"],"_bbp_reply_count":["1"],"_bbp_reply_count_hidden":["0"],"_bbp_voice_count":["2"],"_bbp_engagement":["444240","20905"],"_btv_view_count":["194"],"_bbp_topic_status":["unanswered"],"_bbp_last_reply_id":["396612"],"_bbp_last_active_id":["396612"],"_bbp_last_active_time":["2024-12-06 15:31:21"]},"test":"simone-doniselliinaf-it"}],"_links":{"self":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/396039","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\/396039\/revisions"}],"wp:attachment":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/media?parent=396039"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}