ERROR 312

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

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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Answers

  • Rahul Rajan_21763
    Rahul Rajan_21763 New Altair Community Member
    edited April 2015

    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

  • Altair Forum User
    Altair Forum User
    Altair Employee
    edited April 2015

    Hi Ravi,

     

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

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