Default damping in Optistruct

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

Hi,

does Hypermesh use a default damping factor for harmonic analysis if I don't manually set one?

I need to compare another frequency response without damping and I need to know if the response obtained with Optistruct has or hasn't damping in it.

Thank you

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Answers

  • Altair Forum User
    Altair Forum User
    Altair Employee
    edited June 2017

    Hi @Simonec

     

    HyperMesh/OptiStruct does not have any default values. All are user defined values. 

     

    You can introduce uniform structural damping using Control Cards>> PARAM>> G.

     

    Where G is 2*Critical damping ratio (C/C0)

  • Altair Forum User
    Altair Forum User
    Altair Employee
    edited June 2017

    That's what I thought, thank you!

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