ERROR # 312

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

I'm getting this error: 

 

A fatal error has occurred during computations:

  *** ERROR # 312 ***
  In static load case 1
  the compliance is negative or large 1.33184e+018.
  Optimization/buckling analysis cannot be performed.
  due to possible rigid body mode.
  INFEASIBLE DESIGN (AT LEAST ONE CONSTRAINT VIOLATED).

 

I'm thinking is a problem of units, but I have controlled very carefully all units.

I've used: tonne, mm, N, Nmm, MPa in all steps.

 

Thanks in advance for your time and help! 

 

apprada

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Answers

  • Rahul Rajan_21763
    Rahul Rajan_21763 New Altair Community Member
    edited April 2016

    Hi,

    I see your model having free nodes.Please always check free edges 2d & faces for 3d element.Optimization setup is also not proper.See attached screenshot.

     

    Regards

    Rahul R

    <?xml version="1.0" encoding="UTF-8"?>free nodes.JPG

    <?xml version="1.0" encoding="UTF-8"?>commonly suggested.JPG

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