LNG储罐模拟的问题？

出现以下错误：

Normal cannot be computed in 16 elements. The nodal coordinates may be incorrect or the element aspect ratio may exceed 1000 to 1. The elements have been identified in element set ErrElemNormal.

The geometry of 16 elements is too distorted. Check the nodal coordinates or node numbering on elements identified in element set ErrElemDistorted.

哪位大神知道这是什么错误嘛