一个单元表面的精度也就是均方根误差怎么去求，是要编程么。

重组的幸福

向大神们请教，rms我该怎么求啊，得到一个表面的所有节点了。我想求精度，不能去用计算器吧。几千个节点。有什么好方法么

重组的幸福

自己顶上去

tonnyw

You don't know the exact solution. How could you get the root of square of the error?

重组的幸福

tonnyw 发表于 2013-4-19 11:01
You don't know the exact solution. How could you get the root of square of the error?

我就是通用后处理得到的节点位移啊。但是老师让我求精度我不知道怎么处理了。版主您能告诉我下怎么处理么

tonnyw

As I mentioned before, you don't know exact solution. How could you know the error? If it has something to do with error estimation, it would be too big subject that cannot be digested in a short time. The only thing you can do is to choose all the nodes on a certain surface and get the nodal displacement for all the nodes, put it into a vector, and then calculate the square root of the dot product of the vector (L2 norm). Then you refine the mesh or increase the element order to calculate the L2 norm again to see if there is any significant change. If not, your solution is converged.

tianyikillua

你说后验误差？