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SOL 111. MODAL FREQUENCY RESPONSE

Solution Partner Creator Solution Partner Creator
Solution Partner Creator

Hi,

I am trying to solve with the SOL 111.MODAL FREQUENCY RESPONSE, but in the nastran window I get an error like the following one.

 

USER FATAL MESSAGE 6683 (FRRD1A)

ALL COMPUTED EXCITATION FREQUENCIES ARE OUTSIDE TE RANGE F1 AND F2 FOR FREQ4 AND/OR FREQ5

 

Can someone tell me how to solve it?

 

thank you very much.

 

Carlos

1 REPLY

Re: SOL 111. MODAL FREQUENCY RESPONSE

Solution Partner Creator Solution Partner Creator
Solution Partner Creator

Hi Carlos,

 

It looks like there is no natural frequency between your upper and lower excitation frequency limits ?

 

Did you make a modal analysis beforehand to see the natural frequencies of your system ?

 

Akgun