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Natural frequency constraint

User: "Altair Forum User"
Altair Forum User
Altair Employee
Updated by Altair Forum User

Hi, i'm having a problem with my optimisation. I have created a panel mesh, and tried to constrain it's natural frequency to 0.1Hz,using the EIGRL card in load collectors. and want to optimise the volume fraction. But I always get errors. 

Thank you 

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