direct freq resp and modal frq response

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

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I did direct freq resp and modal frq response analysis for same model with same BCs except addition of EIGRL card

I expected to get same output ,but Peaks are are not matching with each other

Could  anyone explain why is that happening ??  

 

Blue curve is Modal freq and the other curve is Direct Freq

 

Thanks

 

 

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Answers

  • Altair Forum User
    Altair Forum User
    Altair Employee
    edited March 2019

    Hi,

     

    Can you check your frequency range on Eigrl card which should generally be higher than your frequency of interest (in your case 1000).  

  • GAJENDRA KUMAR NHAICHANIYA
    GAJENDRA KUMAR NHAICHANIYA Altair Community Member
    edited March 2019

    Plz share .FEM, .out & .h3d

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