FRF Base Excitation in Optistruct

Arul
Arul Altair Community Member
edited October 2020 in Community Q&A

 

Hi,

 

Need clarification regarding FRF Analysis in Optistruct. What is the difference by applying excitation in two different cases? For example we need to apply 1g excitation. How to apply in below cases?

 

Case 1 - Using RBE2/RBE3

Case 2 - Separate

 

Regards,

Arul

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Answers

  • Rahul Rajan_21763
    Rahul Rajan_21763 New Altair Community Member
    edited December 2018

    I guess case 1 is the right method (spcd is applied at the independent node) instead of exciting at all points.

  • Arul
    Arul Altair Community Member
    edited December 2018

    Hi Rahul,

     

    Thanks for reply. But it that case -1,  the excitation will get applied equally (means 1g divided by 3) ?

     

    Regards,

    Arul

  • Rahul Rajan_21763
    Rahul Rajan_21763 New Altair Community Member
    edited December 2018

    Yes.If we use RBE2 element.

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