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ERROR 312

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

Hi 

I am new to hypermesh and currently I'm working on topology optimization of control arm. But i'm getting the following error

 

A fatal error has occurred during computations:

 

  *** ERROR #  312 ***

  In static load case            1

  the compliance is negative or large   9.504442E+10

  Optimization/buckling analysis cannot be performed

  due to possible rigid body mode

  FEASIBLE DESIGN (ALL CONSTRAINTS SATISFIED).

 

I know it is due to rigid body mode and tried to change my constraints by varying dof's but still it doesn't run.

 

Can anyone explain me about this error?

 

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    User: "Rahul Rajan_21763"
    New Altair Community Member
    Updated by Rahul Rajan_21763

    Hi Ravi,

     

    This is usually because of incorrect or insufficient BC's, Model not being connected properly with other components, incorrect model units etc..

    To cross check, please run a free-free normal modes ( No BC's) extracting say some 20 modes and If possible please share us fem & out file.

     

    Regards

    Rahul R

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

    Hi Ravi,

     

    Also, please check if there are any un-connected nodes/components in your model.