{"id":393284,"date":"2024-11-08T09:31:49","date_gmt":"2024-11-08T09:31:49","guid":{"rendered":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/dynamic_relaxation-and-restart\/"},"modified":"2024-11-08T09:31:49","modified_gmt":"2024-11-08T09:31:49","slug":"dynamic_relaxation-and-restart","status":"publish","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/dynamic_relaxation-and-restart\/","title":{"rendered":"DYNAMIC_RELAXATION and RESTART"},"content":{"rendered":"<p>&lt;p&gt;I am applying dynamic relaxation in my model, with gravity and axial forces imposed in the first step. Although the relevant parameters are set as required, some nodes still exhibit non-zero velocities at the final stage. Moreover, when restarting the analysis for the second step, I observed a sudden increase in node velocities at the beginning, even before applying the new load. I suspect the dynamic relaxation might not have been effectively applied, and the process is also taking a considerable amount of time. Could you advise on how to optimize the dynamic relaxation method, or suggest alternative approaches?<img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/innovationspace.ansys.com\/forum\/wp-content\/uploads\/sites\/2\/2024\/11\/08-11-2024-1731058112-mceclip0.png\" width=\"792\" height=\"415\" \/><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/innovationspace.ansys.com\/forum\/wp-content\/uploads\/sites\/2\/2024\/11\/08-11-2024-1731058188-mceclip1.png\" width=\"755\" height=\"401\" \/><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/innovationspace.ansys.com\/forum\/wp-content\/uploads\/sites\/2\/2024\/11\/08-11-2024-1731058206-mceclip2.png\" width=\"753\" height=\"400\" \/>&lt;\/p&gt;<\/p>\n","protected":false},"template":"","class_list":["post-393284","topic","type-topic","status-publish","hentry","topic-tag-lsdyna"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 4.9.10 - aioseo.com -->\n\t<meta name=\"description\" content=\"I am applying dynamic relaxation in my model, with gravity and axial forces imposed in the first step. Although the relevant parameters are set as required, some nodes still exhibit non-zero velocities at the final stage. Moreover, when restarting the analysis for the second step, I observed a sudden increase in node velocities at the\" \/>\n\t<meta name=\"robots\" content=\"max-image-preview:large\" \/>\n\t<link rel=\"canonical\" href=\"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/dynamic_relaxation-and-restart\/\" \/>\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=\"DYNAMIC_RELAXATION and RESTART | Ansys Learning Forum\" \/>\n\t\t<meta property=\"og:description\" content=\"I am applying dynamic relaxation in my model, with gravity and axial forces imposed in the first step. Although the relevant parameters are set as required, some nodes still exhibit non-zero velocities at the final stage. Moreover, when restarting the analysis for the second step, I observed a sudden increase in node velocities at the\" \/>\n\t\t<meta property=\"og:url\" content=\"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/dynamic_relaxation-and-restart\/\" \/>\n\t\t<meta property=\"article:published_time\" content=\"2024-11-08T09:31:49+00:00\" \/>\n\t\t<meta property=\"article:modified_time\" content=\"2024-11-08T09:31:49+00:00\" \/>\n\t\t<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n\t\t<meta name=\"twitter:title\" content=\"DYNAMIC_RELAXATION and RESTART | Ansys Learning Forum\" \/>\n\t\t<meta name=\"twitter:description\" content=\"I am applying dynamic relaxation in my model, with gravity and axial forces imposed in the first step. Although the relevant parameters are set as required, some nodes still exhibit non-zero velocities at the final stage. Moreover, when restarting the analysis for the second step, I observed a sudden increase in node velocities at the\" \/>\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\\\/dynamic_relaxation-and-restart\\\/#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\\\/lsdyna\\\/#listItem\",\"name\":\"lsdyna\"},\"previousItem\":{\"@type\":\"ListItem\",\"@id\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum#listItem\",\"name\":\"Home\"}},{\"@type\":\"ListItem\",\"@id\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum\\\/forums\\\/topic-tag\\\/lsdyna\\\/#listItem\",\"position\":3,\"name\":\"lsdyna\",\"item\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum\\\/forums\\\/topic-tag\\\/lsdyna\\\/\",\"nextItem\":{\"@type\":\"ListItem\",\"@id\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum\\\/forums\\\/topic\\\/dynamic_relaxation-and-restart\\\/#listItem\",\"name\":\"DYNAMIC_RELAXATION and RESTART\"},\"previousItem\":{\"@type\":\"ListItem\",\"@id\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum\\\/topics\\\/#listItem\",\"name\":\"Topics\"}},{\"@type\":\"ListItem\",\"@id\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum\\\/forums\\\/topic\\\/dynamic_relaxation-and-restart\\\/#listItem\",\"position\":4,\"name\":\"DYNAMIC_RELAXATION and RESTART\",\"previousItem\":{\"@type\":\"ListItem\",\"@id\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum\\\/forums\\\/topic-tag\\\/lsdyna\\\/#listItem\",\"name\":\"lsdyna\"}}]},{\"@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\\\/dynamic_relaxation-and-restart\\\/#webpage\",\"url\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum\\\/forums\\\/topic\\\/dynamic_relaxation-and-restart\\\/\",\"name\":\"DYNAMIC_RELAXATION and RESTART | Ansys Learning Forum\",\"description\":\"I am applying dynamic relaxation in my model, with gravity and axial forces imposed in the first step. 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