2D analysis. CQPSTN element & CONTACT. Node numbering. FATAL
I get FATAL
.out messages mention CQPSTN element node numbering, renumbering, & likely related problem with CONTACT there.
.out suggests to re-import the model, export etc will fix this … but it is not resolved.
.out describes element normals need to be positive. … but it is not resolved.
My model is on the XZ plane.
QUESTION: How can I fix my model?
.out message pasted here:
*** WARNING # 2502
Element 427 had incorrect node numbering sequence and needs renumbering.
....more messages about the elements with incorrect node sequence suppressed.
Note : Please import the model into HyperMesh and export it. This will fix
the problem related to the incorrect node numbering.
*** WARNING # 2501
13560 elements had incorrect node numbering sequence and had their nodes
renumbered. This will affect the orientation of respective element
coordinate systems. If there is any CONTACT/TIE defined on these elements,
an error will be triggered.
*** WARNING # 6571
For CQAXI, CTAXI, CQPSTN, CTPSTN, CQPSTS, CTPSTS and CTRIAX6 elements, the
out-of-plane normal direction defined by the corner node sequence with the
right-hand rule should point to the positive z direction if the element is
in the x-y plane, and, the positive y direction if it is in the x-z plane.
Answers
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So,
I adjusted the element normals
so as the element face facing +y direction appears blue: negative ….
then it ran and solved ok.
In comparison to the .out FATAL message suggestion to +y direction & right hand thumb rule.
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Good to know that you are able to correct the error.
You can refer the below document for more information on this type of analysis.
How to Setup a Plane Strain Analysis in OptiStruct — Altair Community
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Altair Employee