{"id":313209,"date":"2023-10-25T06:18:36","date_gmt":"2023-10-25T06:18:36","guid":{"rendered":"\/forum\/forums\/topic\/nonlinear-convergence-criteria-in-ansys-apdl\/"},"modified":"2023-10-25T06:50:12","modified_gmt":"2023-10-25T06:50:12","slug":"nonlinear-convergence-criteria-in-ansys-apdl","status":"closed","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/nonlinear-convergence-criteria-in-ansys-apdl\/","title":{"rendered":"Nonlinear convergence criteria in ANSYS APDL"},"content":{"rendered":"<p>Hi,<\/p>\n<p>I am doing a nonlinear analysis for the pretensioned concrete beam. The key focus is transfer length.&nbsp;After analyzing the beam, I checked several results. However, some parts were confirmed that were different&nbsp;from the predicted data.<\/p>\n<p>My teacher suggested I achieve a tighter convergence in the analysis.<\/p>\n<p>In addition to increasing the maximum number of iterations, I can use the CNVTOL command to set the convergence value for the nonlinear analysis. I have some questions:<\/p>\n<ol>\n<li>Convergence based issue: As far as the structure is concerned, which method has more convergence and better accuracy of the overall strain curve? Force or displacement?<\/li>\n<li>Is a lower tolerance value better?<\/li>\n<li>Minimum reference value. I don&#8217;t understand what it is, Does this represent the best value of convergence achievable?&nbsp;<\/li>\n<li>What is the difference between VALUE and minimum reference value?<\/li>\n<li>Should the convergence value be as low as possible (e.g. 10^(-10)) or as high as possible (e.g. (1,000,000,000)) in order to achieve higher accuracy of the results?<\/li>\n<\/ol>\n<p><img decoding=\"async\" src=\"\/forum\/wp-content\/uploads\/sites\/2\/2023\/10\/25-10-2023-1698214485-Screenshot 2023-10-25 063744.png\" alt=\"\"><\/p>\n","protected":false},"template":"","class_list":["post-313209","topic","type-topic","status-closed","hentry","topic-tag-convergence-1","topic-tag-Staticstructural-1","topic-tag-ansys-apdl","topic-tag-ansys-mechanical-apdl"],"aioseo_notices":[],"acf":[],"custom_fields":[{"0":{"_bbp_subscription":["262636","17821"],"_bbp_author_ip":["23.52.43.81"]," _bbp_last_reply_id":["0"]," _bbp_likes_count":["0"],"_btv_view_count":["3119"],"_bbp_topic_status":["unanswered"],"_bbp_status":["publish"],"_bbp_topic_id":["313209"],"_bbp_forum_id":["27791"],"_bbp_engagement":["17821","262636"],"_bbp_voice_count":["2"],"_bbp_reply_count":["1"],"_bbp_last_reply_id":["313460"],"_bbp_last_active_id":["313460"],"_bbp_last_active_time":["2023-10-26 09:40:04"]},"test":"ucess04ucl-ac-uk"}],"_links":{"self":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/313209","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\/313209\/revisions"}],"wp:attachment":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/media?parent=313209"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}