negative eigenvalue为什么含义

herman111

做一份牙种植体与骨接触分析,系统提示以下信息：37 nodes may have incorrect normal definitions. The nodes have been identified in node set WarnNodeIncorrectNormal.
7 elements are distorted. Either the interior angles are out of the suggested limits or the triangular or tetrahedral quality measure is bad. The elements have been identified in element set WarnElemDistorted.
The system matrix has 1 negative eigenvalues.
The system matrix has 20 negative eigenvalues.
不知是什么含义，是否为模型问题。把inp文件附上，处理了好久的网格，检查下还是有警告网格存在，abaqus刚接触，请大家指教了

zsq-w

“negative eigenvalue为什么含义”
请看我签名档之《错误信息》链接。

lz的模型可能是7 elements are distorted.这个问题，这个在《错误信息》链接中也有，lz先看看对你的模型有没有帮助。

herman111

好的 谢谢