{"id":403419,"date":"2025-01-03T15:54:24","date_gmt":"2025-01-03T15:54:24","guid":{"rendered":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/prestressed-substructure-generation\/"},"modified":"2025-01-03T15:55:30","modified_gmt":"2025-01-03T15:55:30","slug":"prestressed-substructure-generation","status":"publish","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/prestressed-substructure-generation\/","title":{"rendered":"Prestressed substructure generation"},"content":{"rendered":"<p>&lt;p&gt;&lt;p&gt;Hi everyone,&lt;\/p&gt;&lt;p&gt;I am trying to perform a substructure generation using the option to include pre-stress environment from a static structural analysis. I get an error saying that Lagrange Multiplier formulation has been used somewhere in the model and therefore condensation is not possible. However, this error disappears when turning off the pre-stress option without changing anything else and the condensation runs successfully. &lt;\/p&gt;&lt;p&gt;My model is complex and consists of fixed bushing with MPC formulation as well as MATRIX27 elements. I have ensured that all remote points etc use MPC formulation and loads are applied using those same remote points. There are no contacts in the model, only shared topology.&lt;\/p&gt;&lt;p&gt;Right now I can not think of anything that could cause the introduction of Lagrange multipliers and hinder the condensation. &lt;\/p&gt;&lt;p&gt;Any ideas?&lt;\/p&gt;&lt;p&gt;P.S. I am using the 2024 R2 ANSYS release&lt;\/p&gt;&lt;p&gt; &lt;\/p&gt;&lt;\/p&gt;<\/p>\n","protected":false},"template":"","class_list":["post-403419","topic","type-topic","status-publish","hentry"],"aioseo_notices":[],"acf":[],"custom_fields":[{"0":{"_bbp_forum_id":["27791"],"_bbp_topic_id":["403419"],"_bbp_author_ip":["147.102.131.244"],"_bbp_last_reply_id":["404155"],"_bbp_last_active_id":["404155"],"_bbp_last_active_time":["2025-01-08 18:09:28"],"_bbp_reply_count":["1"],"_bbp_reply_count_hidden":["0"],"_bbp_voice_count":["2"],"_bbp_engagement":["80011","436953"],"_btv_view_count":["167"],"_bbp_topic_status":["unanswered"],"_edit_last":["80011"],"_bbp_revision_log":["a:1:{i:403420;a:2:{s:6:\"author\";i:80011;s:6:\"reason\";s:0:\"\";}}"],"_bbp_subscription":["436953"]},"test":"mc20008mail-ntua-gr"}],"_links":{"self":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/403419","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":1,"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/403419\/revisions"}],"predecessor-version":[{"id":403420,"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/403419\/revisions\/403420"}],"wp:attachment":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/media?parent=403419"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}