Doubts Reg. Application of two or more Loads in Single Load Case

Gowtham2022

Hi Experts,

I am using Optistruct to solve the structural problems.

I case of Two Wheeler Disc Brake Rotor Structural Simulation two or more Loads (Imposed Displacement of Brake Pads, Clamping forces and Torque) will act at same time . Is it possible to give two or more loads in Single Load Case or can we combine the Different Loads.

If it possible to perform such type of Load case in Optistruct can you please suggest the procedure to execute the simulation.

For such instance some of sample tutorial images from different solvers had been attached below for your reference.

solon

Hello,

you can refer to the first part of the following tutorial:

https://help.altair.com/hwsolvers/os/topics/solvers/os/simlab_brake_squeal_analysis_tutorial_intro_r.htm

In general you can add multiple loads with a LOADADD bulk data entry:

https://help.altair.com/hwsolvers/os/topics/solvers/os/loadadd_bulk_r.htm?zoom_highlight=loadadd

Gowtham2022

Thank you Solon for your response.

I will try look into the tutorial and try to establish for my problem.

Gowtham2022

Hi Solon,

Is there any possibilities in OptiStruct to apply the Displacement as a Boundary Condition to the component.

If it possible could you please share the details of it.

solon

You can have a look at the following discussion:

https://community.altair.com/discussion/27267/how-can-i-specify-an-enforced-displacement-in-a-subcase-or-loadstep-in-an-optistruct-input-deck

Gowtham2022

Hi Solon,

I have tried to solve the simulation as per our discussions and references even though my simulation is not converging. Can you please correct my simulation procedure or specify my mistake. So, I could rectify the issue.

If Possible could you please share your mail id.

I have attached some of the image and OUT file for your reference. Kindly find the attachments.

Trial_3_Only_CF_with_center_alldof_constrain.out

Kindly please note that I am sovling the simaultion in Implict method.

solon

Please take a look at this good article for Troubleshooting for OptiStruct Nonlinear Convergence Issues.

https://community.altair.com/discussion/39803/troubleshooting-for-optistruct-nonlinear-convergence-issues

It seems that the contacts are apart at the start of the analysis causing singularity. Ensure that the contacts are initially touching, and/or add contact stabilization energy via CNTSTB bulk data entry:

https://help.altair.com/hwsolvers/os/topics/solvers/os/cntstb_bulk_r.htm?zoom_highlight=cntstb