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Error #5408 i.e "Modal Frequency Response Analysis"

Messages for the job:

*** ERROR # 5408 ***
Aborting analysis because no structural modes have been
computed in the modal dynamic subcase 1.

*** PROGRAM STOPPED: FATAL ERROR(s) ENCOUNTERED.

I am not understanding why this error is comming. Please help me.

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Altair Forum User

hi @Rajendra Prasad

Error 5408 indicated that the solver cannot find any mode between the bounds you specified in the EIGRL card, thus it cannot proceed with the frequency response solution.

Please increase the upper bound to a higher value. You may want to run just a normal mode solution (ND=10) and see what is the lowest frequency and then adjust the upper bound accordingly for the frequency response analysis subcase.

gopal_rathore

Hi,

It seems there is some problem in your EIGRL card. Have you entered the range of frequency in it or number of modes. If the range of frequency does not have any mode this issue might come. Please clarify for it.

Altair Forum User

hi @Rajendra Prasad

Error 5408 indicated that the solver cannot find any mode between the bounds you specified in the EIGRL card, thus it cannot proceed with the frequency response solution.

Please increase the upper bound to a higher value. You may want to run just a normal mode solution (ND=10) and see what is the lowest frequency and then adjust the upper bound accordingly for the frequency response analysis subcase.

Thanks for reply sir

Altair Forum User

Hi,

It seems there is some problem in your EIGRL card. Have you entered the range of frequency in it or number of modes. If the range of frequency does not have any mode this issue might come. Please clarify for it.

Thanks for reply sir..

Gauri Mandekar

hi @Rajendra Prasad

Error 5408 indicated that the solver cannot find any mode between the bounds you specified in the EIGRL card, thus it cannot proceed with the frequency response solution.

Please increase the upper bound to a higher value. You may want to run just a normal mode solution (ND=10) and see what is the lowest frequency and then adjust the upper bound accordingly for the frequency response analysis subcase.

Hello I'm getting error 5408 The frequency range is 0 to 1000 hz I am not getting what is upper bound and how to calculate it And also what is ND?How to calculate it?? Would you please help me ?