Helicopter Rotor Critical RPM

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

Hello Guys,

 

I have a working model of a composite helicopter blade.

I have extracted the modal frequencies of the blade.

 

I want to know if there is a way to find out at what rotational speeds will the blade reach any of those modal frequencies? 

is there a way to do this on hyperworks?

 

Kind Regards,

Mohamed

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Answers

  • Altair Forum User
    Altair Forum User
    Altair Employee
    edited November 2016

    Hi Mohammed,

     

    Can you please explain what inputs you have?

  • Altair Forum User
    Altair Forum User
    Altair Employee
    edited November 2016

    Hi Prakash,

     

    I currently have the model, with a boundary condition at the root. No other inputs.

    I want to find at what RPM if this blade spins, will it reach one of it's natural modes.

     

    Thanks

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