Random vibration analysis using Optistruct

Altair Forum User
Altair Forum User
Altair Employee
edited October 2020 in Community Q&A

Team,

 

I am learning the Optistruct solve and Hyperstudy. I am doing the simple Plate test case study for Random vibration analysis using Optistruct solver.

Already I have benchmark in ANSYS and I want to compare with Altair. 

 

Attached the images.

 

Could you share the random vibration analysis procedure ?

<?xml version="1.0" encoding="UTF-8"?>A1.JPG

<?xml version="1.0" encoding="UTF-8"?>A2.JPG

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Answers

  • Altair Forum User
    Altair Forum User
    Altair Employee
    edited October 2017

    Hi,

     

    Random response analysis is a transfer function of FRF and is a mode based procedure.

     

    You need to have these load collectors like RLOAD2, DAREA, FREQi etc as inputs for FRF analysis.

     

    I presume ANSYS applies a unit load by default for FRF and then uses it as transfer function to RRA

     

    Thanks,

    Vikas

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