隧道开挖

tankette

我在做隧道开挖计算的时候出现这样的错误，请各位帮忙看看，我的理解是隧道开挖变形过大，甚至坍塌，才会有这样的错误（网格划分没问题的）
One or more elements have become highly distorted.  Excessive           
distortion of elements is usually a symptom indicating the need for     
corrective action elsewhere.  Try incrementing the load more slowly     
(increase the number of substeps or decrease the time step size).  You  
may need to improve your mesh to obtain elements with better aspect     
ratios.  Also consider the behavior of materials, contact pairs,        
and/or constraint equations.  If this message appears in the first      
iteration of first substep, be sure to perform element shape checking.

zhengyu8711

我也遇到过这种问题，好像是说约束不够，或者是某些点的瞬时位移过大造成的，请问楼主的问题解决了吗？

c7225237

我也出现过 网格划分在细一点可以解决