求助：ansys13.0拓扑优化问题

lijianmin

ansys13.0能不能进行拓扑优化？二维问题，我选择的单元是plane183，出现了如下问题。。
*** ERROR ***                           CP =      17.109   TIME= 17:01:45
A type 1 topology optimization element has been detected referring to   
an element type which is not supported for topological optimization.   
The TODEF command is ignored.                                          

*** ERROR ***                           CP =      17.125   TIME= 17:01:46
Topological optimization is not active (issue the TODEF command).      
选择plane82就没问题，但帮助里面说拓扑优化用plane183可以的~~

2.2.2. Select the Element Types

Topological optimization supports 2-D planar and 3-D solid elements. To use this technique, your model must contain only the following element types:
2-D Solids: PLANE182 or PLANE183
3-D Solids: SOLID186 or SOLID187
The 2-D elements should be used for plane stress or axisymmetric applications.