多相材料布局及材料/结构一体化设计

为解决多相材料分布及材料/结构一体化优化问题，本文引入基于惩罚指数的材料插值方案对传统双向渐进结构优化的灵敏度算法进行了合理的改进。通过经典算例证实了改进算法在解决传统BESO方法不能胜任的多相材料分布优化和材料/结构一体化优化问题具有很好的收敛性和有效性。对常见参数对结构优化结果影响的研究，得出一些具有实际指导意义的结论。本文所开发的协同软件平台基于简单的ABAQUS建模软件界面降低了对设计人员技能要求，灵活的MATLAB二次开发平台为算法改进提供了广阔的空间。

Multiple materials layout or material and structural system optimization

To solve the problem of multiple materials layout or material and structural system optimization, a new bi-directional evolutionary structural optimization method utilizing material interpolation scheme with penalization is proposed in this paper. Several classic examples are shown that the present BESO method can be used for the multiple materials layout or material and structural system optimization which the traditional BESO can not be solved. Number of practical significance conclusions are given by the important parameters researched. Computer program software for the new BESO program is built on the FEA software of ABAQUS and the post-processor package in MATLAB. This program is easy to use for engineers who may not be familiar with either FEA and structure optimization. And the developer can give a deep research on the algorithm by change the MATLAB.