{"id":396601,"date":"2024-12-06T14:35:16","date_gmt":"2024-12-06T14:35:16","guid":{"rendered":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/model-order-reduction-with-line-bodies\/"},"modified":"2024-12-06T14:35:16","modified_gmt":"2024-12-06T14:35:16","slug":"model-order-reduction-with-line-bodies","status":"publish","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/model-order-reduction-with-line-bodies\/","title":{"rendered":"Model order reduction with line bodies"},"content":{"rendered":"<p>&lt;p&gt;<img decoding=\"async\" src=\"https:\/\/innovationspace.ansys.com\/forum\/wp-content\/uploads\/sites\/2\/2024\/12\/06-12-2024-1733495062-Schermafbeelding 2024-12-06 152358.png\" alt=\"\" \/>&lt;\/p&gt;&lt;p&gt;I have the following model created. Is it build up from line bodies with different crossections assigned. In mechanical, different joints are created between line bodies as part of the structure is welded(fixed) and part of the structure is a truss structure with pinned(hinged) connections. Static structural and modal analysis were performed and work without problems.&nbsp;&lt;br&gt;Now, I want to reduce the model to obtain the stiffness and mass matrix from the reduced model. The interface points to reduce to will be the center axis and endpoints of each boom. Using the substructure generation analysis seems unsuitable as it gives the warning: &#8216; Only Fixed joints and Bushing formulation joints are allowed for a joint in substructure generation.'&lt;br&gt;&lt;br&gt;Is there a way to overcome this error or a different way of obtaining a reduced model for stiffness and mass matrix?&lt;\/p&gt;&lt;p&gt;Thanks in advance, any help is appreciated!&nbsp;&lt;\/p&gt;<\/p>\n","protected":false},"template":"","class_list":["post-396601","topic","type-topic","status-publish","hentry","topic-tag-joints-1","topic-tag-line-body","topic-tag-reduced-order-model"],"aioseo_notices":[],"acf":[],"custom_fields":[{"0":{"_bbp_forum_id":["27790"],"_bbp_topic_id":["396601"],"_bbp_subscription":["490162","240"],"_bbp_author_ip":["2001:67c:2564:331:2160:a0f2:442f:8b8f"],"_bbp_last_reply_id":["396701"],"_bbp_last_active_id":["396701"],"_bbp_last_active_time":["2024-12-08 21:03:24"],"_bbp_reply_count":["1"],"_bbp_reply_count_hidden":["0"],"_bbp_voice_count":["2"],"_bbp_engagement":["490162","240"],"_btv_view_count":["194"],"_bbp_topic_status":["unanswered"]},"test":"h-g-roubosstudent-utwente-nl"}],"_links":{"self":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/396601","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\/396601\/revisions"}],"wp:attachment":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/media?parent=396601"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}