Hello,<\/p>\n
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I’m wondering to understand how does workbench process the frictionless contact on a Modal Analysis.<\/p>\n
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I do know that the Modal Analysis is a linear analysis and only take in consideration linear contacts, any non linear contact is ignored (according to the help “3.1. Uses for Modal Analysis”), however I do have a situation where I have lots of covers bolted to a more rigid body along the extremities and the faces of both are touching each other. That will not allow some of the displacements.<\/p>\n
<\/p>\n
If I run that model considering NO Face-To-Face contacts, I have very low natural frequencies but none of them are actually real. So I decided using frictionless contact. The results were 3 times better, the displacements shown were very close to what I expect on the reality. But….. How did it run a nonlinear contact on the Modal Analysis???? Does it convert the contacts into Bonded???<\/p>\n
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Well I did that test, I converted all frictionless contacts into bonded and run again. The results were again even better than with frictionless contacts, though not real, I know!<\/p>\n
<\/p>\n
So again my question is, How does Workbench run Frictionless face contact on a Modal Analysis? Can I even trust the results???<\/p>\n
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<\/p>\n
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Thanks!<\/p>\n
<\/p>\n
Fabricio Morais<\/p>\n","protected":false},"template":"","class_list":["post-39061","topic","type-topic","status-closed","hentry"],"aioseo_notices":[],"acf":[],"custom_fields":[{"0":{"_bbp_old_topic_id":["11240"],"_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"],"_btv_view_count":["9158"],"_bbp_subscription":["245095"],"_bbp_topic_status":["unanswered"],"_bbp_status":["publish"],"_bbp_topic_id":["39061"],"_bbp_forum_id":["27791"],"_bbp_engagement":["240","170733"],"_bbp_voice_count":["2"],"_bbp_reply_count":["1"],"_bbp_last_reply_id":["98834"],"_bbp_last_active_id":["98834"],"_bbp_last_active_time":["2019-11-20 21:19:41"]},"test":"fabriciomorais"}],"_links":{"self":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/39061","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\/39061\/revisions"}],"wp:attachment":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/media?parent=39061"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}