| 摘要: |
| 运用响应面法，以碰撞吸收能量最大为目标，薄壁结构几何尺寸为设计变量，碰撞作用力为约束，对薄壁结构进行结构优化。利用有限元程序ANSYS／LS-DYNA计算大变形的高度非线性碰撞问题。根据正交试验设计法安排每个试验点，最小二乘法拟合响应面，利用DOT程序得到该响应面的最优值。不断重复整个过程，直到获得薄壁结构的优化设计参数。研究结果表明响应面法应用于碰撞吸能的结构优化问题上是可行的，具有提高计算效率，节省计算机时间等优点。 |
| 关键词: 结构优化 碰撞 响应面法 有限元 |
| DOI：10.11841/j.issn.1007-4333.2005.01.024 |
| 修订日期：2004-07-07 |
| 基金项目:中国铁道部基金资助项目 (2 0 0 2YF16 ) |
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| Application of response surface method in impacting energy absorption of thin-walled structure |
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| Abstract: |
| An optimization process of a thin-walled structure was performed by the response surface method, which took the maximum absorption energy from an impacting process as objective, the properties of the thin-walled structure as variables, and the impacting axial force as constraint. In this study, the explicit finite element code, ANSYS/LS-DYNA, was adopted to simulate the complicated impacting behavior of the thin-walled structure. The orthogonal design and least square methods were used to fit the response surface, and the optimal one was obtained by the numerical optimization program DOT. This optimization process would be repeated until a set of parameters optimized for optimum design of a thin-walled structure was obtained. The results demonstrated that the response surface method in structural optimization of impacting energy absorption was feasible, and had merits of high computing efficiency and short computing time. |
| Key words: structural optimization,impact,response surface method,finite element |
