1. static structural - warning

2. transient structural - 高度扭曲（highly distorted）

解決方法：來(lái)自 https://www.youtube.com/watch?v=fI2a_xP0veI

①網(wǎng)格

physics preference >>>?non-linear mechanical

element order >>> linear

②考慮網(wǎng)格自適應(yīng)

③合理設(shè)置網(wǎng)格一開(kāi)始的長(zhǎng)寬比，使最后的變形網(wǎng)格長(zhǎng)寬比接近1?

（materials that are being uniformly stretched or compressed can benefit from changing the original aspect ratio to prevent excessive aspect ratios once deformed）

④開(kāi)auto time stepping