{"id":37353,"date":"2019-08-27T12:40:05","date_gmt":"2019-08-27T12:40:05","guid":{"rendered":"\/forum\/forums\/topic\/constraints-for-topology-optimization\/"},"modified":"2019-08-27T12:40:05","modified_gmt":"2019-08-27T12:40:05","slug":"constraints-for-topology-optimization","status":"closed","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/constraints-for-topology-optimization\/","title":{"rendered":"Constraints for topology optimization"},"content":{"rendered":"<p>Hi everyone,<\/p>\n<p><\/p>\n<p>I am currently working with version 2019 R2 and I have following problem in a topology optimization for a plattform like shown. The middle hole is fixed while the ones in the corners are external displacement locked in z-direction.<\/p>\n<p><\/p>\n<p>I have several static structural systems connected and my objectives are to minimize compliance for each static structural system as well as a mass reduction. As a response constraint I used global von mises stress with 2,75e^7 Pa.<\/p>\n<p><\/p>\n<p>But when I add a validation system the maximum stress is something like 4e^6 Pa, which is compared to the constraint very low. Thats why I would like to increase this value, resulting in further mass reduction as well. Unfortunately I have no idea, which parameters to change for obtaining a better solution.<\/p>\n<p><\/p>\n<p>Mesh convergence, solution convergence are already checked.<\/p>\n<p><\/p>\n<p>&nbsp;<\/p>\n<p><\/p>\n<p>Any help is much appriciated<\/p>\n<p><\/p>\n<p>best regards!<\/p>\n","protected":false},"template":"","class_list":["post-37353","topic","type-topic","status-closed","hentry"],"aioseo_notices":[],"acf":[],"custom_fields":[{"0":{"_bbp_old_topic_id":["9530"],"_bbp_old_topic_author_name_id":["Anonymous"],"_bbp_old_is_topic_anonymous_id":["false"],"_bbp_old_closed_status_id":["publish"],"_bbp_author_ip":[null],"_bbp_old_sticky_status_id":["normal"],"_bbp_likes_count":["0","0"],"_btv_view_count":["1641"],"_bbp_subscription":["242410"],"_bbp_topic_status":["unanswered"],"_bbp_status":["publish"],"_bbp_topic_id":["37353"],"_bbp_forum_id":["27791"],"_bbp_engagement":["897","167950"],"_bbp_voice_count":["2"],"_bbp_reply_count":["2"],"_bbp_last_reply_id":["93146"],"_bbp_last_active_id":["93146"],"_bbp_last_active_time":["2019-08-29 17:28:27"]},"test":"spakerare"}],"_links":{"self":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/37353","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\/37353\/revisions"}],"wp:attachment":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/media?parent=37353"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}