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Optistruct Modal FRF analysis encouter an error ==>OptiStruct ERROR: 156

Altair Forum User

hi,

I am doing the modal frequancy responce analysis in optistructure and i am facing problem which is ,

ERROR # 156 FROM SUBROUTINE splncz

No mode exists in the interval specified.

Solver error no. = 0

subcase id = 1

minimum frequency = 2.000000E+01

maximum frequency = 2.500000E+02

Check the model and rerun the problem.

***** FATAL SOLVER ERROR *****

This error occurs in subroutine slvdrv

Is there any one who can help me to solve this problem i will be very thank full to you

Thanks

Regards

Bali

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Altair Forum User

Please contact your local support with your problem

Altair Forum User

Maybe you can run an analysis for modes under the same boundary condition to see how the modes vibrate

Altair Forum User

Try rerunning with a much larger frequency range, say 20 - 1000Hz or with a lower bound and a number of modes and no upper limit. The error indicates that no modes are predicted in the range requested, so there may not be anything wrong with the model.