Workbench Solver pivot errors with semitrailer analysis
Workbench Solver pivot errors with semitrailer analysis
(OP)
Dear all,
I am rather new to ANSYS and am trying to use to analyze a semitrailer structure under various loading cases.
Many Thanks
I am rather new to ANSYS and am trying to use to analyze a semitrailer structure under various loading cases.
- Starting fro CAD which was a SolidWorks assembly file, I used Anssys SpaceClaim direct modeler to prepare the CAD and solve some problems before meshing it into ANSYS.
- I had to supress three sold parts (400, mirror400 and 506) in order to get it to mesh, I am not sure if this is right or there is a better way to solve the issues with meshing, anyways.
- After suppressing the three aforementioned parts, meshing went through OK, I then applied constraints at the suspension and king pin and added some load (100 N) just to see how things will work.
- I received the following message,"Solver pivot warnings or errors have been encountered during the solution. This is usually a result of an ill conditioned matrix possibly due to unreasonable material properties, an under constrained model, or contact related issues. Check results carefully."
- I looked into the contacts folder and I suppressed all contacts with errors (not sure if this right either), I rerun the analysis and got the same error message again.
- I have archived the whole analysis workbench files and uploaded them. I will appreciate your help on this.
Many Thanks
David Smith





RE: Workbench Solver pivot errors with semitrailer analysis
"On the human scale, the laws of Newtonian Physics are non-negotiable"
RE: Workbench Solver pivot errors with semitrailer analysis
Rick Fischer
Principal Engineer
Argonne National Laboratory
RE: Workbench Solver pivot errors with semitrailer analysis
rickfischer51 thank you for your reply,
All contacts are bonded, I've turned off weak springs and still the simulation will not run "PROBLEM TERMINATED BY INDICATED ERROR(S) OR BY END OF INPUT DATA"
I've attached the error file, and will appreciate your input.
Thank you all
David Smith
RE: Workbench Solver pivot errors with semitrailer analysis
nsel,s,node,,99994
esln,s,0
esel,u,stif,,168,178
*get,enum,elem,0,num,min
*get,typeno,elem,enum,attr,type
esel,s,type,,typeno
Cut and past this into the command line. In Workbench, each part has ia distict type number, so this should select the component.
Rick Fischer
Principal Engineer
Argonne National Laboratory