Error # 1664 free size optimisation RANDPS

Altair Forum User
Altair Forum User
Altair Employee
edited October 2020 in Community Q&A

Dear sir, i'm new one for the optimization, so some problem occurred during running size optimiztion. please help me.... *** ERROR # 1664 *** in the input data:  X must be greater than zero for auto spectral density.'

 

I create a rms displacement response and fot use that I create a RANDPS card. But I don't understand this card.

 

Any help please?

 

Best regards

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Answers

  • Altair Forum User
    Altair Forum User
    Altair Employee
    edited June 2014

    Can you check the value for X in  RANDPS card? it should be greater than zero

  • Altair Forum User
    Altair Forum User
    Altair Employee
    edited June 2014

    It is the problem, I have no RANDPS card. So I have to create one but I don't know the value of the coefficient

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