{"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":[],"aioseo_head":"\n\t\t<!-- All in One SEO 4.9.10 - aioseo.com -->\n\t<meta name=\"description\" content=\"Hi all, 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:1.\" \/>\n\t<meta name=\"robots\" content=\"max-image-preview:large\" \/>\n\t<link rel=\"canonical\" href=\"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/mesh-effect-stiffness\/\" \/>\n\t<meta name=\"generator\" content=\"All in One SEO (AIOSEO) 4.9.10\" \/>\n\t\t<meta property=\"og:locale\" content=\"en_US\" \/>\n\t\t<meta property=\"og:site_name\" content=\"Ansys Learning Forum | Ansys Innovation Space\" \/>\n\t\t<meta property=\"og:type\" content=\"article\" \/>\n\t\t<meta property=\"og:title\" content=\"Mesh effect stiffness | Ansys Learning Forum\" \/>\n\t\t<meta property=\"og:description\" content=\"Hi all, 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:1.\" \/>\n\t\t<meta property=\"og:url\" content=\"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/mesh-effect-stiffness\/\" \/>\n\t\t<meta property=\"article:published_time\" content=\"2024-11-21T08:31:15+00:00\" \/>\n\t\t<meta property=\"article:modified_time\" content=\"2024-11-21T08:33:16+00:00\" \/>\n\t\t<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n\t\t<meta name=\"twitter:title\" content=\"Mesh effect stiffness | Ansys Learning Forum\" \/>\n\t\t<meta name=\"twitter:description\" content=\"Hi all, 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:1.\" \/>\n\t\t<script type=\"application\/ld+json\" class=\"aioseo-schema\">\n\t\t\t{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum\\\/forums\\\/topic\\\/mesh-effect-stiffness\\\/#breadcrumblist\",\"itemListElement\":[{\"@type\":\"ListItem\",\"@id\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum#listItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum\",\"nextItem\":{\"@type\":\"ListItem\",\"@id\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum\\\/topics\\\/#listItem\",\"name\":\"Topics\"}},{\"@type\":\"ListItem\",\"@id\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum\\\/topics\\\/#listItem\",\"position\":2,\"name\":\"Topics\",\"item\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum\\\/topics\\\/\",\"nextItem\":{\"@type\":\"ListItem\",\"@id\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum\\\/forums\\\/topic-tag\\\/stiffness-behaviour\\\/#listItem\",\"name\":\"stiffness-behaviour\"},\"previousItem\":{\"@type\":\"ListItem\",\"@id\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum#listItem\",\"name\":\"Home\"}},{\"@type\":\"ListItem\",\"@id\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum\\\/forums\\\/topic-tag\\\/stiffness-behaviour\\\/#listItem\",\"position\":3,\"name\":\"stiffness-behaviour\",\"item\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum\\\/forums\\\/topic-tag\\\/stiffness-behaviour\\\/\",\"nextItem\":{\"@type\":\"ListItem\",\"@id\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum\\\/forums\\\/topic\\\/mesh-effect-stiffness\\\/#listItem\",\"name\":\"Mesh effect stiffness\"},\"previousItem\":{\"@type\":\"ListItem\",\"@id\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum\\\/topics\\\/#listItem\",\"name\":\"Topics\"}},{\"@type\":\"ListItem\",\"@id\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum\\\/forums\\\/topic\\\/mesh-effect-stiffness\\\/#listItem\",\"position\":4,\"name\":\"Mesh effect stiffness\",\"previousItem\":{\"@type\":\"ListItem\",\"@id\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum\\\/forums\\\/topic-tag\\\/stiffness-behaviour\\\/#listItem\",\"name\":\"stiffness-behaviour\"}}]},{\"@type\":\"Organization\",\"@id\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum\\\/#organization\",\"name\":\"Ansys Learning Forum\",\"description\":\"Ansys Innovation Space\",\"url\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum\\\/\"},{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum\\\/forums\\\/topic\\\/mesh-effect-stiffness\\\/#webpage\",\"url\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum\\\/forums\\\/topic\\\/mesh-effect-stiffness\\\/\",\"name\":\"Mesh effect stiffness | Ansys Learning Forum\",\"description\":\"Hi all, According to what I know, mesh density does not affect natural frequencies. 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