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# SOL 111 Modal Frequency Response_ ERROR No forcing frequencies defined

Creator

Hi evryone, i'm studing the modal frequency response of a rotating impeller on Nx 10.0 ( see the picture bellow). but i could not define any forcing frequiencies. so i keep getting this erreur message:

ERROR : No forcing frequencies defined in step "Subcase - Modal Frequency 1".
Forcing frequencies are required for this frequency response solution step.
ACTION: Define forcing frequencies in the Solution Step Attributes.

Any help would be great.

Thank you

Here you will find the sim and fem part:

https://www.dropbox.com/s/k1j4clyyhevt7w8/moteur%20et%20fan_sim1.sim?dl=0

https://www.dropbox.com/s/1wng5zs862vyhoa/moteur%20et%20fan_fem1_i.prt?dl=0

https://www.dropbox.com/s/ztdzxvy6dg93eoe/moteur%20et%20fan_fem1.fem?dl=0

https://www.dropbox.com/s/2f9crk6qvvecgo9/moteur%20et%20fan.prt?dl=0

# Re: SOL 111 Modal Frequency Response_ ERROR No forcing frequencies defined

Siemens Legend

Hello,

You need to define forcing frequencies (FREQ cards). Kindly define in case control section of your solution or subcase.

Refer the snapshot here.

T&R

RB