{"id":372516,"date":"2024-07-18T10:05:24","date_gmt":"2024-07-18T10:05:24","guid":{"rendered":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/calculation-of-stiffness-amp-mass-matrix\/"},"modified":"2024-07-18T10:05:24","modified_gmt":"2024-07-18T10:05:24","slug":"calculation-of-stiffness-amp-mass-matrix","status":"closed","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/calculation-of-stiffness-amp-mass-matrix\/","title":{"rendered":"Calculation of stiffness &amp; mass matrix"},"content":{"rendered":"<p>Is the shape function for the SOLID187 (10-node tetrahedron) determined solely by the given L1,L2,L3,L4?<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/innovationspace.ansys.com\/forum\/wp-content\/uploads\/sites\/2\/2024\/07\/18-07-2024-1721297037-mceclip0.png\" width=\"682\" height=\"218\"><\/p>\n<p>I am trying to calculate the element stiffness and mass matrices using MATLAB, but the error becomes significant as the number of elements increases. Specifically, the mass matrix is calculated using &rho;&int;N&#8217;*N*dV, yet the error remains large. What could be the reason for this? (I have confirmed that the Gauss points are 4 through PRESOL and LOCI)<\/p>\n","protected":false},"template":"","class_list":["post-372516","topic","type-topic","status-closed","hentry","topic-tag-finite-element-method","topic-tag-mass-matrix-1","topic-tag-stiffness-matrix"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 4.9.10 - aioseo.com -->\n\t<meta name=\"description\" content=\"Is the shape function for the SOLID187 (10-node tetrahedron) determined solely by the given L1,L2,L3,L4?I am trying to calculate the element stiffness and mass matrices using MATLAB, but the error becomes significant as the number of elements increases. Specifically, the mass matrix is calculated using \u03c1\u222bN&#039;*N*dV, yet the error remains large. 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Specifically, the mass matrix is calculated using \u03c1\u222bN'*N*dV, yet the error remains large. 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Specifically, the mass matrix is calculated using \u03c1\u222bN'*N*dV, yet the error remains large. What could be the","inLanguage":"en-US","isPartOf":{"@id":"https:\/\/innovationspace.ansys.com\/forum\/#website"},"breadcrumb":{"@id":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/calculation-of-stiffness-amp-mass-matrix\/#breadcrumblist"},"datePublished":"2024-07-18T10:05:24+00:00","dateModified":"2024-07-18T10:05:24+00:00"},{"@type":"WebSite","@id":"https:\/\/innovationspace.ansys.com\/forum\/#website","url":"https:\/\/innovationspace.ansys.com\/forum\/","name":"Ansys Learning Forum","description":"Ansys Innovation Space","inLanguage":"en-US","publisher":{"@id":"https:\/\/innovationspace.ansys.com\/forum\/#organization"}}]},"og:locale":"en_US","og:site_name":"Ansys Learning Forum | Ansys Innovation Space","og:type":"article","og:title":"Calculation of stiffness &amp; mass matrix | Ansys Learning Forum","og:description":"Is the shape function for the SOLID187 (10-node tetrahedron) determined solely by the given L1,L2,L3,L4?I am trying to calculate the element stiffness and mass matrices using MATLAB, but the error becomes significant as the number of elements increases. Specifically, the mass matrix is calculated using \u03c1\u222bN'*N*dV, yet the error remains large. What could be the","og:url":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/calculation-of-stiffness-amp-mass-matrix\/","og:image":"https:\/\/innovationspace.ansys.com\/forum\/wp-content\/uploads\/sites\/2\/2024\/07\/18-07-2024-1721297037-mceclip0.png","og:image:secure_url":"https:\/\/innovationspace.ansys.com\/forum\/wp-content\/uploads\/sites\/2\/2024\/07\/18-07-2024-1721297037-mceclip0.png","article:published_time":"2024-07-18T10:05:24+00:00","article:modified_time":"2024-07-18T10:05:24+00:00","twitter:card":"summary_large_image","twitter:title":"Calculation of stiffness &amp; mass matrix | Ansys Learning Forum","twitter:description":"Is the shape function for the SOLID187 (10-node tetrahedron) determined solely by the given L1,L2,L3,L4?I am trying to calculate the element stiffness and mass matrices using MATLAB, but the error becomes significant as the number of elements increases. Specifically, the mass matrix is calculated using \u03c1\u222bN'*N*dV, yet the error remains large. What could be the","twitter:image":"https:\/\/innovationspace.ansys.com\/forum\/wp-content\/uploads\/sites\/2\/2024\/07\/18-07-2024-1721297037-mceclip0.png"},"aioseo_meta_data":{"post_id":"372516","title":null,"description":null,"keywords":null,"keyphrases":null,"primary_term":null,"canonical_url":null,"og_title":null,"og_description":null,"og_object_type":"default","og_image_type":"content","og_image_url":null,"og_image_width":null,"og_image_height":null,"og_image_custom_url":null,"og_image_custom_fields":null,"og_video":null,"og_custom_url":null,"og_article_section":null,"og_article_tags":null,"twitter_use_og":true,"twitter_card":"default","twitter_image_type":"default","twitter_image_url":null,"twitter_image_custom_url":null,"twitter_image_custom_fields":null,"twitter_title":null,"twitter_description":null,"schema":{"blockGraphs":[],"customGraphs":[],"default":{"data":{"Article":[],"Course":[],"Dataset":[],"FAQPage":[],"Movie":[],"Person":[],"Product":[],"ProductReview":[],"Car":[],"Recipe":[],"Service":[],"SoftwareApplication":[],"WebPage":[]},"graphName":"","isEnabled":true},"graphs":[]},"schema_type":"default","schema_type_options":null,"pillar_content":false,"robots_default":true,"robots_noindex":false,"robots_noarchive":false,"robots_nosnippet":false,"robots_nofollow":false,"robots_noimageindex":false,"robots_noodp":false,"robots_notranslate":false,"robots_max_snippet":null,"robots_max_videopreview":null,"robots_max_imagepreview":"large","priority":null,"frequency":null,"local_seo":null,"limit_modified_date":false,"created":"2024-10-28 16:36:56","updated":"2024-10-28 16:36:56","ai":null,"breadcrumb_settings":null,"seo_analyzer_scan_date":null},"aioseo_breadcrumb":"<div class=\"aioseo-breadcrumbs\"><span class=\"aioseo-breadcrumb\">\n\t\t\t<a href=\"https:\/\/innovationspace.ansys.com\/forum\" title=\"Home\">Home<\/a>\n\t\t<\/span><span class=\"aioseo-breadcrumb-separator\">&raquo;<\/span><span class=\"aioseo-breadcrumb\">\n\t\t\t<a href=\"https:\/\/innovationspace.ansys.com\/forum\/topics\/\" title=\"Topics\">Topics<\/a>\n\t\t<\/span><span class=\"aioseo-breadcrumb-separator\">&raquo;<\/span><span class=\"aioseo-breadcrumb\">\n\t\t\t<a href=\"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic-tag\/stiffness-matrix\/\" title=\"stiffness-matrix\">stiffness-matrix<\/a>\n\t\t<\/span><span class=\"aioseo-breadcrumb-separator\">&raquo;<\/span><span class=\"aioseo-breadcrumb\">\n\t\t\tCalculation of stiffness &amp; mass matrix\n\t\t<\/span><\/div>","aioseo_breadcrumb_json":[{"label":"Home","link":"https:\/\/innovationspace.ansys.com\/forum"},{"label":"Topics","link":"https:\/\/innovationspace.ansys.com\/forum\/topics\/"},{"label":"stiffness-matrix","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic-tag\/stiffness-matrix\/"},{"label":"Calculation of stiffness &amp; mass matrix","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/calculation-of-stiffness-amp-mass-matrix\/"}],"acf":[],"custom_fields":[{"0":{"_bbp_subscription":["80516","88"],"_bbp_author_ip":["166.104.168.157"]," _bbp_last_reply_id":["0"]," _bbp_likes_count":["0"],"_btv_view_count":["476"],"_bbp_topic_status":["unanswered"],"_bbp_topic_id":["372516"],"_bbp_forum_id":["27791"],"_bbp_engagement":["88","80516"],"_bbp_voice_count":["2"],"_bbp_reply_count":["1"],"_bbp_last_reply_id":["373227"],"_bbp_last_active_id":["373227"],"_bbp_last_active_time":["2024-07-23 12:34:57"]},"test":"dhjang4522gmail-com"}],"_links":{"self":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/372516","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\/372516\/revisions"}],"wp:attachment":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/media?parent=372516"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}