Altair RISE

A program to recognize and reward our most engaged community members

Helicopter Rotor Critical RPM

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

English

HyperMesh

Hi Mohammed,

Can you please explain what inputs you have?

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