{"id":291099,"date":"2023-06-30T15:29:37","date_gmt":"2023-06-30T15:29:37","guid":{"rendered":"\/forum\/forums\/topic\/twist-of-springs\/"},"modified":"2023-07-03T10:51:53","modified_gmt":"2023-07-03T10:51:53","slug":"twist-of-springs","status":"closed","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/twist-of-springs\/","title":{"rendered":"Twist of springs"},"content":{"rendered":"<p>Hi everyone. For a two-way FSI simulation of flow over a cylinder, I defined four springs (body-to-ground) with similar stiffness in transient structural ANSYS. With the defined inlet velocity of flow in CFX, I expect to get the resonance amplitude in transient structural. But after 20 seconds, the simulation got diverged. In the result, it seems springs start twisting because of the nonlinearity of the problem. How could I solve this problem? <a class=\"wp-colorbox-image cboxElement\" href=\"\/forum\/wp-content\/uploads\/sites\/2\/2023\/06\/30-06-2023-1688138721-Cylinder with four springs.png\"><img decoding=\"async\" src=\"\/forum\/wp-content\/uploads\/sites\/2\/2023\/06\/30-06-2023-1688138721-Cylinder with four springs.png\" alt=\"\"><\/a><\/p>\n","protected":false},"template":"","class_list":["post-291099","topic","type-topic","status-closed","hentry","topic-tag-convergenceerror-1","topic-tag-fsi-simulation","topic-tag-nonlinearconvergenceissue-1","topic-tag-spring-modelling-1","topic-tag-static-structrural-2"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 4.9.10 - aioseo.com -->\n\t<meta name=\"description\" content=\"Hi everyone. For a two-way FSI simulation of flow over a cylinder, I defined four springs (body-to-ground) with similar stiffness in transient structural ANSYS. With the defined inlet velocity of flow in CFX, I expect to get the resonance amplitude in transient structural. But after 20 seconds, the simulation got diverged. In the result, it\" \/>\n\t<meta name=\"robots\" content=\"max-image-preview:large\" \/>\n\t<link rel=\"canonical\" href=\"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/twist-of-springs\/\" \/>\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=\"Twist of springs | Ansys Learning Forum\" \/>\n\t\t<meta property=\"og:description\" content=\"Hi everyone. For a two-way FSI simulation of flow over a cylinder, I defined four springs (body-to-ground) with similar stiffness in transient structural ANSYS. With the defined inlet velocity of flow in CFX, I expect to get the resonance amplitude in transient structural. But after 20 seconds, the simulation got diverged. In the result, it\" \/>\n\t\t<meta property=\"og:url\" content=\"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/twist-of-springs\/\" \/>\n\t\t<meta property=\"og:image\" content=\"https:\/\/innovationspace.ansys.com\/forum\/forum\/wp-content\/uploads\/sites\/2\/2023\/06\/30-06-2023-1688138721-Cylinder%20with%20four%20springs.png\" \/>\n\t\t<meta property=\"og:image:secure_url\" content=\"https:\/\/innovationspace.ansys.com\/forum\/forum\/wp-content\/uploads\/sites\/2\/2023\/06\/30-06-2023-1688138721-Cylinder%20with%20four%20springs.png\" \/>\n\t\t<meta property=\"article:published_time\" content=\"2023-06-30T15:29:37+00:00\" \/>\n\t\t<meta property=\"article:modified_time\" content=\"2023-07-03T10:51:53+00:00\" \/>\n\t\t<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n\t\t<meta name=\"twitter:title\" content=\"Twist of springs | Ansys Learning Forum\" \/>\n\t\t<meta name=\"twitter:description\" content=\"Hi everyone. For a two-way FSI simulation of flow over a cylinder, I defined four springs (body-to-ground) with similar stiffness in transient structural ANSYS. With the defined inlet velocity of flow in CFX, I expect to get the resonance amplitude in transient structural. But after 20 seconds, the simulation got diverged. In the result, it\" \/>\n\t\t<meta name=\"twitter:image\" content=\"https:\/\/innovationspace.ansys.com\/forum\/forum\/wp-content\/uploads\/sites\/2\/2023\/06\/30-06-2023-1688138721-Cylinder with four springs.png\" \/>\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\\\/twist-of-springs\\\/#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\\\/fsi-simulation\\\/#listItem\",\"name\":\"fsi-simulation\"},\"previousItem\":{\"@type\":\"ListItem\",\"@id\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum#listItem\",\"name\":\"Home\"}},{\"@type\":\"ListItem\",\"@id\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum\\\/forums\\\/topic-tag\\\/fsi-simulation\\\/#listItem\",\"position\":3,\"name\":\"fsi-simulation\",\"item\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum\\\/forums\\\/topic-tag\\\/fsi-simulation\\\/\",\"nextItem\":{\"@type\":\"ListItem\",\"@id\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum\\\/forums\\\/topic\\\/twist-of-springs\\\/#listItem\",\"name\":\"Twist of springs\"},\"previousItem\":{\"@type\":\"ListItem\",\"@id\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum\\\/topics\\\/#listItem\",\"name\":\"Topics\"}},{\"@type\":\"ListItem\",\"@id\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum\\\/forums\\\/topic\\\/twist-of-springs\\\/#listItem\",\"position\":4,\"name\":\"Twist of springs\",\"previousItem\":{\"@type\":\"ListItem\",\"@id\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum\\\/forums\\\/topic-tag\\\/fsi-simulation\\\/#listItem\",\"name\":\"fsi-simulation\"}}]},{\"@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\\\/twist-of-springs\\\/#webpage\",\"url\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum\\\/forums\\\/topic\\\/twist-of-springs\\\/\",\"name\":\"Twist of springs | Ansys Learning Forum\",\"description\":\"Hi everyone. For a two-way FSI simulation of flow over a cylinder, I defined four springs (body-to-ground) with similar stiffness in transient structural ANSYS. With the defined inlet velocity of flow in CFX, I expect to get the resonance amplitude in transient structural. But after 20 seconds, the simulation got diverged. 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For a two-way FSI simulation of flow over a cylinder, I defined four springs (body-to-ground) with similar stiffness in transient structural ANSYS. With the defined inlet velocity of flow in CFX, I expect to get the resonance amplitude in transient structural. But after 20 seconds, the simulation got diverged. 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For a two-way FSI simulation of flow over a cylinder, I defined four springs (body-to-ground) with similar stiffness in transient structural ANSYS. With the defined inlet velocity of flow in CFX, I expect to get the resonance amplitude in transient structural. But after 20 seconds, the simulation got diverged. 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With the defined inlet velocity of flow in CFX, I expect to get the resonance amplitude in transient structural. But after 20 seconds, the simulation got diverged. In the result, it","twitter:image":"https:\/\/innovationspace.ansys.com\/forum\/forum\/wp-content\/uploads\/sites\/2\/2023\/06\/30-06-2023-1688138721-Cylinder with four springs.png"},"aioseo_meta_data":{"post_id":"291099","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 18:01:17","updated":"2024-10-28 18:01:17","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\/fsi-simulation\/\" title=\"fsi-simulation\">fsi-simulation<\/a>\n\t\t<\/span><span class=\"aioseo-breadcrumb-separator\">&raquo;<\/span><span class=\"aioseo-breadcrumb\">\n\t\t\tTwist of springs\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":"fsi-simulation","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic-tag\/fsi-simulation\/"},{"label":"Twist of springs","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/twist-of-springs\/"}],"acf":[],"custom_fields":[{"0":{"_bbp_subscription":["29207","20905","240"],"_bbp_author_ip":["23.206.193.154"]," _bbp_last_reply_id":["0"]," _bbp_likes_count":["0"],"_btv_view_count":["970"],"_edit_lock":["1688381497:220423"],"_bbp_topic_status":["unanswered"],"_bbp_status":["publish"],"_bbp_topic_id":["291099"],"_bbp_forum_id":["27791"],"_bbp_engagement":["240","20905","29207"],"_bbp_voice_count":["3"],"_bbp_reply_count":["8"],"_bbp_last_reply_id":["291692"],"_bbp_last_active_id":["291692"],"_bbp_last_active_time":["2023-07-05 15:27:06"]},"test":"pegah-mehrabianpolymtl-ca"}],"_links":{"self":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/291099","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\/291099\/revisions"}],"wp:attachment":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/media?parent=291099"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}