Modal Analysis with operating speed

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

Hi,

I need to carry out a modal analysis with operating speed. I know how to carry out a Normal mode analysis with EIGRL card in Optistruct.

How to specify the operating speed as load in Modal analysis.

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Answers

  • Altair Forum User
    Altair Forum User
    Altair Employee
    edited April 2017

    Hi @sten9mpk

     

    Check Modal frequency response analysis.

  • Altair Forum User
    Altair Forum User
    Altair Employee
    edited April 2017

    I am trying to find out the natural frequencies of the system when it is rotating at an RPM. basically i want generate a Campbell diagram. this will not be a Response analysis.

  • Altair Forum User
    Altair Forum User
    Altair Employee
    edited April 2017

    @sten9mpk

     

    You can run a static analysis with the load and refer this in a normal mode subcase under STATSUB(Preload)

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