Transient Structural of Child Car Seat

  • Last Post 26 March 2019
tungfw posted this 24 March 2019

The solver engine was unable to converge on a solution for the nonlinear problem as constrained.  Please see the Troubleshooting section of the Help System for more information.


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peteroznewman posted this 24 March 2019

Looks like the Solver was about to converge.

You can insert a Command Object to make it keep trying for more iterations instead of stopping after 26 iterations.  Click on Transient, then click on the Command Object button, then type the command


 You can also give it a smaller by half initial time increment.


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tungfw posted this 26 March 2019

Hi Peter, 

this is the furthest result I did this morning. The problem is the model keep shaking forward and backward. I thought it will be forward until it reaches maximum velocity and start decelerates?

tungfw posted this 26 March 2019



peteroznewman posted this 26 March 2019

Transient models need Damping added as a property of the structure. In the Analysis Settings, there is a Damping Controls category. You need to enter some Rayleigh Damping coefficients. Start with a Damping Ratio of 0.2 (20%).  You might want to run a Modal analysis to see what frequencies are in your model.