{"id":170662,"date":"2023-06-05T07:04:55","date_gmt":"2023-06-05T07:04:55","guid":{"rendered":"\/knowledge\/forums\/topic\/in-ansys-mechanical-when-forces-or-displacements-are-applied-on-nodes-using-direct-fe-that-conflict-with-a-displacement-frictionless-support-etc-the-solve-immediately-issues-an-error-message-as-be\/"},"modified":"2023-07-31T12:33:31","modified_gmt":"2023-07-31T12:33:31","slug":"in-ansys-mechanical-when-forces-or-displacements-are-applied-on-nodes-using-direct-fe-that-conflict-with-a-displacement-frictionless-support-etc-the-solve-immediately-issues-an-error-message-as-be","status":"publish","type":"topic","link":"https:\/\/innovationspace.ansys.com\/knowledge\/forums\/topic\/in-ansys-mechanical-when-forces-or-displacements-are-applied-on-nodes-using-direct-fe-that-conflict-with-a-displacement-frictionless-support-etc-the-solve-immediately-issues-an-error-message-as-be\/","title":{"rendered":"In ANSYS Mechanical when forces or displacements are applied on nodes using Direct FE that conflict with a displacement, Frictionless Support, etc. the Solve immediately  issues an error message as below and stops solving.   &#8220;The solver has found conflicting DOF constraints with define Direct FE loading at one or more nodes&#8221;  , and the error is resolved when Direct FE loading  is replaced with Geometric loading.   Why is this message being issued when there is no conflict (boundary conditions are not adjacent)?"},"content":{"rendered":"<p>In Mechanical the frictionless support may require nodal rotations which are done more or less automatically.  Nodal rotations would invalidate the force loading. In APDL the user is in control of and aware of nodal rotations so he can do whatever he wants.  In your test the nodal forces did not conflict with the adjacent constraints for the frictionless support, but the error trap is not precise enough to detect that.<\/p>\n","protected":false},"template":"","class_list":["post-170662","topic","type-topic","status-publish","hentry","topic-tag-17-2","topic-tag-general","topic-tag-mechanical","topic-tag-structural-mechanics-general","topic-tag-structural-mechanics"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 4.9.10 - aioseo.com -->\n\t<meta name=\"description\" content=\"In Mechanical the frictionless support may require nodal rotations which are done more or less automatically. Nodal rotations would invalidate the force loading. In APDL the user is in control of and aware of nodal rotations so he can do whatever he wants. In your test the nodal forces did not conflict with the adjacent\" \/>\n\t<meta name=\"robots\" content=\"max-image-preview:large\" \/>\n\t<link rel=\"canonical\" href=\"https:\/\/innovationspace.ansys.com\/knowledge\/forums\/topic\/in-ansys-mechanical-when-forces-or-displacements-are-applied-on-nodes-using-direct-fe-that-conflict-with-a-displacement-frictionless-support-etc-the-solve-immediately-issues-an-error-message-as-be\/\" \/>\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 Knowledge | Ansys Innovation Space\" \/>\n\t\t<meta property=\"og:type\" content=\"article\" \/>\n\t\t<meta property=\"og:title\" content=\"In ANSYS Mechanical when forces or displacements are applied on nodes using Direct FE that conflict with a displacement, Frictionless Support, etc. the Solve immediately issues an error message as below and stops solving. \u201cThe solver has found conflicting DOF constraints with define Direct FE loading at one or more nodes\u201d , and the error is resolved when Direct FE loading is replaced with Geometric loading. Why is this message being issued when there is no conflict (boundary conditions are not adjacent)? | Ansys Knowledge\" \/>\n\t\t<meta property=\"og:description\" content=\"In Mechanical the frictionless support may require nodal rotations which are done more or less automatically. Nodal rotations would invalidate the force loading. In APDL the user is in control of and aware of nodal rotations so he can do whatever he wants. In your test the nodal forces did not conflict with the adjacent\" \/>\n\t\t<meta property=\"og:url\" content=\"https:\/\/innovationspace.ansys.com\/knowledge\/forums\/topic\/in-ansys-mechanical-when-forces-or-displacements-are-applied-on-nodes-using-direct-fe-that-conflict-with-a-displacement-frictionless-support-etc-the-solve-immediately-issues-an-error-message-as-be\/\" \/>\n\t\t<meta property=\"article:published_time\" content=\"2023-06-05T07:04:55+00:00\" \/>\n\t\t<meta property=\"article:modified_time\" content=\"2023-07-31T12:33:31+00:00\" \/>\n\t\t<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n\t\t<meta name=\"twitter:title\" content=\"In ANSYS Mechanical when forces or displacements are applied on nodes using Direct FE that conflict with a displacement, Frictionless Support, etc. the Solve immediately issues an error message as below and stops solving. \u201cThe solver has found conflicting DOF constraints with define Direct FE loading at one or more nodes\u201d , and the error is resolved when Direct FE loading is replaced with Geometric loading. 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Why is this message being issued when there is no conflict (boundary conditions are not adjacent)? | Ansys Knowledge","og:description":"In Mechanical the frictionless support may require nodal rotations which are done more or less automatically. Nodal rotations would invalidate the force loading. In APDL the user is in control of and aware of nodal rotations so he can do whatever he wants. 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Why is this message being issued when there is no conflict (boundary conditions are not adjacent)?\n\t\t<\/span><\/div>","aioseo_breadcrumb_json":[{"label":"Home","link":"https:\/\/innovationspace.ansys.com\/knowledge"},{"label":"Topics","link":"https:\/\/innovationspace.ansys.com\/knowledge\/topics\/"},{"label":"structural-mechanics","link":"https:\/\/innovationspace.ansys.com\/knowledge\/forums\/topic-tag\/structural-mechanics\/"},{"label":"In ANSYS Mechanical when forces or displacements are applied on nodes using Direct FE that conflict with a displacement, Frictionless Support, etc. the Solve immediately  issues an error message as below and stops solving.   &#8220;The solver has found conflicting DOF constraints with define Direct FE loading at one or more nodes&#8221;  , and the error is resolved when Direct FE loading  is replaced with Geometric loading.   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