{"id":394690,"date":"2024-11-21T08:31:15","date_gmt":"2024-11-21T08:31:15","guid":{"rendered":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/mesh-effect-stiffness\/"},"modified":"2024-11-21T08:33:16","modified_gmt":"2024-11-21T08:33:16","slug":"mesh-effect-stiffness","status":"publish","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/mesh-effect-stiffness\/","title":{"rendered":"Mesh effect stiffness"},"content":{"rendered":"<p>&lt;p&gt;&lt;p&gt;Hi all,&nbsp;&lt;\/p&gt;&lt;p&gt;According to what I know, mesh density does not affect natural frequencies. I have performed a modal analysis for a model with different element sizes. For the lower modes, the natural frequencies do not differ significantly, but when extracting the higher modes, the differences between the natural frequencies vary greatly. I have two questions:&lt;\/p&gt;&lt;p&gt;1. How does mesh density affect the stiffness of the model? &nbsp;&lt;\/p&gt;&lt;p&gt;&lt;br&gt;2. Why does mesh density affect the higher modes?&lt;\/p&gt;&lt;p&gt;<img decoding=\"async\" src=\"https:\/\/innovationspace.ansys.com\/forum\/wp-content\/uploads\/sites\/2\/2024\/11\/21-11-2024-1732177817-mceclip0.png\" \/>&lt;\/p&gt;&lt;\/p&gt;<\/p>\n","protected":false},"template":"","class_list":["post-394690","topic","type-topic","status-publish","hentry","topic-tag-Structuredmeshing-2","topic-tag-Modal_Analysis-1","topic-tag-stiffness-behaviour"],"aioseo_notices":[],"acf":[],"custom_fields":[{"0":{"_bbp_author_ip":["2402:9d80:204:6e81:9d43:bda0:c38e:a2c5"],"_btv_view_count":["193"],"_bbp_topic_status":["unanswered"],"_bbp_subscription":["303892","431745"],"_edit_last":["303892"],"_bbp_revision_log":["a:1:{i:394692;a:2:{s:6:\"author\";i:303892;s:6:\"reason\";s:0:\"\";}}"],"_bbp_topic_id":["394690"],"_bbp_forum_id":["27796"],"_bbp_engagement":["303892","431745"],"_bbp_voice_count":["2"],"_bbp_reply_count":["2"],"_bbp_last_reply_id":["394706"],"_bbp_last_active_id":["394706"],"_bbp_last_active_time":["2024-11-21 10:12:51"]},"test":"f08b0eba1a48ae75afb76f8e55f00a1800139305"}],"_links":{"self":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/394690","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\/394690\/revisions"}],"predecessor-version":[{"id":394692,"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/394690\/revisions\/394692"}],"wp:attachment":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/media?parent=394690"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}