薄壁覆盖件的结构优化设计

THE STRUCTURAL OPTIMIZATION DESIGN OF SHEET COVER

研究了薄壁覆盖件结构优化设计中的一些关键技术，包括薄壁覆盖件的结构有限元分析、优化方法选择、敏度分析和结构重分析，选择了序列二次规划法用于结构优化问题，且收敛效果较好。以汽车车身为例，对其进行了结构优化设计，计算结果合理适用，所编制的软件（ＯＰＴＳＨＥＥＴ）使用方便可靠。

In this paper, some critical techniques of the structural optimization design of the sheet cover are researched and solved, including the structural FE analysis, the choice of the optimal methods, the sensitivity analysis and the structural re analysis. The sequential quadratic programming (SQP) is chosen to solve the structural optimization problem and is efficient for the convergence. The stress, the displacement and the frequency information are computed by the finite element method. The plate element and the beam element are used in the structural analysis. Speeding up the structural analysis, the re analysis technique is accepted in the structural optimization. By the FE method, the sensitivity information is carried out and is used for the optimization of the sheet cover. At the same time, the car body of the structural optimization design is finished as a sample. The optimal result is reasonable and applicable. The programmed software OPTSHEET is proved to be convenient, reliable.