求助，abaqus模型不收敛，矩阵有大量负特征值什么原因？
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The system matrix has 24249 negative eigenvalues.
The system matrix has 94131 negative eigenvalues.
Excessive distortion at a total of 41177 integration points in solid (continuum) elements
The system matrix has 101 negative eigenvalues.
The system matrix has 40626 negative eigenvalues.
Excessive distortion at a total of 34586 integration points in solid (continuum) elements
FORCE equilibrium accepted using the alternate tolerance.
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