The solver engine was unable to converge

  • Last Post 21 October 2019
susu posted this 20 October 2019


I'm trying to run a non-linear analysis for a passenger bus seat that is given a certain force (x direction) on the back of the chair. I have to hold that force for at least 0.2 sec. I'm also using bolt to link the chair to the floor.


I'm using Ansys 19.2, however the analysis is not succesful.


The error happens because the solver engine was unable to converge on a solution for the nonlinear problem as constrained. I have tried to increase the step to 50 steps.


Please help me to fix this issue and complete my analysis.

Thank you.


Attach bellow is the model for my analysis.





here is the error and warnings

Attached Files

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sathya posted this 20 October 2019

Hi,If you are sure about other inputs,Check for Newton Raphson Residuals and identify the contact giving trouble.

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susu posted this 21 October 2019

Thank you Sathya, I will resolve the analysis with the newton raphson residual on.