Tutorial OS-T 1600

Altair Forum User
Altair Forum User
Altair Employee
edited April 2021 in Community Q&A

Hello,

 

i tried to solve the Optistruct OS-T 1600 Tutorial, but after starting the two solvers (optistruct, acusolve) there is a convergence error of acusolve that stops the job:

 

Messages for the job:

 
 *** ERROR # 5202 ***
 Acusolve stops before FSI iteration achieves convergence.
 
 *** PROGRAM STOPPED: FATAL ERROR(s) ENCOUNTERED.

 

 

Does anyone knows the problem? I checked all steps of the tutorial and start it again, but the error still appears.

 

The next step was to change the convergence criterio of acusolve (convergence_tolerance) and optistruct (fsi card: FCNVTOL, DCNVTOL) and the exchange parameter of acusolve (min/max_stagger_iterations) and optistruct (min/maxEX), but the error still appears.

 

Does anyone has got experience with the tutorial OS-T 1600 and solved it successfull?

Thank you very much in advance.

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Answers

  • ydigit
    ydigit
    Altair Employee
    edited April 2018

    I have tested this tutorial, but its been a while. Would it be possible to upload the files as a zip?

  • Sobir Basith
    Sobir Basith New Altair Community Member
    edited April 2021

    Is anyone facing this error. Please help me. I cannot solve it yet

  • Rajiv Venkatasubramanian_22139
    Rajiv Venkatasubramanian_22139
    Altair Employee
    edited April 2021

    @Sobir Basith 

    May I ask which version of OptiStruct and AcuSolve you are using? 

    If you are not running v2019.0, then can you please try this version?

    If you continue to see the same error with v2019.0, then can you try running both OptiStruct and AcuSolve separately without coupling to make sure they run fine?

    If nothing mentioned above works, then for the FSI coupled run which shows the error - Can you please share the .out/stat files from the OptiStruct run, the cci.txt file for coupling and the AcuSolve .log file? 

    Regards,
    Rajiv

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