考虑大变形的时候不收敛怎么办？

huangguo1986

不考虑的话收敛，这是为什么？怎么处理？望知道的给与帮助

popo10

Based on my personal experience, most of the divergence issues in large deformation modeling is because of the consequent severe element distortion. So
1. try to remesh your model, and keep element's aspect ratio close to 1. I almost sloved all my divergence issues by carefully doing this.
2. add more loading substeps.

Of course, many other ways to improve the convergence problem, these are just some for your reference. Give a try.

原帖由 huangguo1986 于 2008-8-2 00:31 发表
不考虑的话收敛，这是为什么？怎么处理？望知道的给与帮助

guayigou

尤其在大变形情况中,不收敛与网格划分质量有关.如果涉及接触,就要仔细分辨了

mjq8708

好，试一试，希望有用，谢谢ＬＺ！

好好学习

我想问一下 增加子步 最多能增加到多少？因为在使用大变形效应时，计算到不收敛的时间比用小变形算的小不少，还有如果划分的网格太多的话 会提示产生刚体位移的现象，可我施加的约束根本没有问题，因为我施加的是两边完全固定的情况