复合形CSCD

代码说明：

说明：  本程序采用的复合形法对机械结构（如螺栓等）进行了优化。优化结果表面，在满足强度条件可以减少螺栓数量，已发表CSCD一篇，可以用作课堂教学。(The complex method adopted in this program is used to optimize the mechanical structure (such as bolts, etc.). On the surface of the optimized results, the number of bolts can be reduced when the strength condition is satisfied. A CSCD article has been published, which can be used for classroom teaching.)