Clarification on Frequency Response Analysis in OptiStruct

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

Ahoy!

 

I was going through the tutorial for FRA in Optistruct using the tutorial file wherein it said I need to free DoF 6 for SPCS. 

 

i would like to know why this particular DoF (Z-Rotational) is chosen to be freed and if there is any relation/ effect if I free or constrain any other DoF for SPC. 

 

Thank You!

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Answers

  • Altair Forum User
    Altair Forum User
    Altair Employee
    edited February 2017

    Hi Vaman,

     

    Can you post the tutorial title or ID?

  • Altair Forum User
    Altair Forum User
    Altair Employee
    edited February 2017

    OS-1300: Direct Frequency Response Analysis of a Flat Plate

  • Altair Forum User
    Altair Forum User
    Altair Employee
    edited February 2017

    Hi Vaman,

     

    I think there will be change in result, never tried but you can request displacement, acceleration for the nodes around and in Z direction to spot the difference. 

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