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Frequency Response Analysis with two rotors rotating at two different speeds with two different excitations

User: "Chandra Shekhar Nyalapogula"
Chandra Shekhar Nyalapogula
Altair Community Member
Updated by Chandra Shekhar Nyalapogula

 

Hi

 

I am doing FBO and Windmilling Frequency Response Analysis for two  rotors engine system.

Is to possible to run frequency response analysis with two rotors, with two different unbalances and one is rotating at constant speed and other one sweeping from 0 to 300Hz. If yes, please send me the master deck how to do that. Thank you very much.

 

With Regards,

Chandra

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OptiStruct
v2021.2
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    User: "Xiaolei"
    Xiaolei
    Altair Employee
    Updated by Xiaolei

    Hi Chandra, 

    The solver gives error if one is rotating at constant speed. The workaround could be to define a small range of speeds like the below:

    image

     

    Thanks. 

    Xiaolei

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