求助：刚体与土接触分析不收敛

Bullshit1213

小弟做了一个刚体与土的分析，土的本构模型选用摩尔库伦，弹性材料的时候是收敛的，改为弹塑性模型的时候就不收敛了，看到有资料说是摩尔库伦模型网格要画粗一下，我画粗一些还是出现问题
The strain increment is so large that the program will not attempt the plasticity calculation at 2 points
The plasticity/creep/connector friction algorithm did not converge at 23 points
The system matrix has 19 negative eigenvalues.
The strain increment is so large that the program will not attempt the plasticity calculation at 5 points
The plasticity/creep/connector friction algorithm did not converge at 5 points
Excessive distortion at a total of 125 integration points in solid (continuum) elements
The system matrix has 4 negative eigenvalues.
The strain increment is so large that the program will not attempt the plasticity calculation at 1 points
The plasticity/creep/connector friction algorithm did not converge at 5 points
Excessive distortion at a total of 5 integration points in solid (continuum) elements
The strain increment is so large that the program will not attempt the plasticity calculation at 13 points
The plasticity/creep/connector friction algorithm did not converge at 15 points
算不下去
inp文件

tsw20031117

应力余量太大，是不是增加计算步数~！

Bullshit1213

tsw20031117 发表于 2012-2-25 15:33
应力余量太大，是不是增加计算步数~！

嗯，感谢您的指点！后来我改为6个分析步，三个方向的力分别逐渐加上去，结果收敛了。