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Nonlinear quasi-static analysis optimization

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Hi,

recently i am simulating the beam under three-point bending conditions.I want to apply displacement load on the beam,Thereby obtaining the maximum reaction force。

 

Taking the thickness of the beam as a design variable,mass as objective。load step is Nonlinear quasi-static analysis...There is a fatal error

 

image.png.ff08ddf19c1b689c1478d77a04b6cb69.png

 

 

How to solve this problem?Can Optistruct be optimized in nonlinear quasi-static analysis?

 

 

 

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Thank you @Rahul R

 

It worked,I want to set contact force(reaction force) as dconstrains,but I don't know how to set response?

 

Is there any related tutorial or example on the official website?

 

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Contact pressure and contact force from both S2S and N2S contacts can now be used as a response (DRESP1) in optimization formulation.New optimization response is supported in OptiStruct version 2018.PFA same deck for same where we used contact force as constraints.

80_Contpres_model.fem

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Thank you @Rahul R

 

After applying  the elastoplastic property, the analysis type is changed to nonlinear quasi-static analysis. Why is the calculation time so long, is my parameter setting wrong?

 

This kind of nonlinear quasi-static due to materials generally needs to set which parameters to improve the calculation efficiency?

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