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Negative Jacobian error message on Modal Analysis

Negative Jacobian error message on Modal Analysis

Negative Jacobian error message on Modal Analysis

(OP)

Every time I attempt to run a modal analysis on my model I get the error message:
* * * E R R O R * * * (WHILE RUNNING ANALYSIS)
NEGATIVE JACOBIAN ENCOUNTERED,
CHECK ELEMENT CONNECTIVITY AND JOINT COORDINATES FOR ELEMENT 1147

Now, I have two questions. How could I find an element in etabs and someone knows why did it happened this error.

RE: Negative Jacobian error message on Modal Analysis

Not sure how you would find individual elements. But hopefully this thread helps a little anyways.

RE: Negative Jacobian error message on Modal Analysis

(OP)
thanks, I am gonna check it now.

RE: Negative Jacobian error message on Modal Analysis

Perhaps trying to use the Ritz method could fix your issue...

Analysis and Design of arbitrary cross sections
Reinforcement design to all major codes
Moment Curvature analysis

http://www.engissol.com/cross-section-analysis-des...

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