Freq resp

Bernt Isaksen
Bernt Isaksen Altair Community Member
edited May 2022 in Community Q&A

Hi experts

I get an error message I don't understand. I'm doing a frequency response (Sine) analysis, and I gert this:

 *** ERROR # 4844 ***
BASELINE -1093659375 in subcase 6: At least 3 acceleration points are expected.
 

Any??

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Answers

  • Adriano A. Koga
    Adriano A. Koga
    Altair Employee
    edited May 2022

    Can you share the .out file?

    And also explain what you are trying to do, please.

  • Bernt Isaksen
    Bernt Isaksen Altair Community Member
    edited May 2022

    Hi Adriano

     

    I'm attemting to do a frequency response analysis to see how the structure with its natural frequencies respond to a sine input.

    I define several loadcases.

    Subcase 1 is a static pressure load to be used as a preload for normal modes analysis

    Subcase 2 is a Normal M;odes analysis wirh preload from Subcase 1 ( STATSUB(PRELOAD) = 1

    Subcase 3 is the frequency Response analysis where I also get this error message.

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