The Ansys Innovation Space website recently experienced a database corruption issue. While service has been restored there appears to have been some data loss from November 13. We are still investigating and apologize for any issues our users may have as a result.
Guilin Sun
Ansys Employee

是叫做“非线性”,但是你查看它用什么非线性效应了吗?你看看这个例子是怎么工作的。