Optimal design of composite sandwich structure
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摘要: 利用复合材料蒙皮结构的弯扭耦合效应可以改善翼面的气动弹性特性.为使这种结构的弯曲扭转耦合效应最大,采用遗传算法来优化设计这类结构,并以蜂窝结构为例进行分析.采用有限元计算软件分析目标函数,将铺层板、蜂窝夹芯的强度作为约束函数,并通过遗传算法优化与有限元计算有机的结合,开发了以有限元为基础的复杂问题的结构优化软件系统.Abstract: The aeroelastic property of a wing can be improved by using the bending-twisting coupling effect of composite material skin. A genetic algorithm approach was employed to optimize this type structure in order to maximize the effect of bending twisting coupling and a sandwich structure to be an analysis example. A finite element software was used to analysis the objective function, the strength of the sandwich structure were used as the restriction function. The genetic algorithms optimum and finite element analysis function were integrated so that a structure optimal software was developed for complex structure optimization.
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Key words:
- honeycomb structure /
- coupling /
- genetic algorithms /
- composite materials
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[1] Kodiyalam S, Nagendra S. Composite sandwich structure optimization with application to satellite components[J]. AIAA Journal, 1996, 34(3):614~621 [2] 中国航空研究院. 复合材料设计手册[M]. 北京:航空工业出版社,2001 Chinese Institute of Aeronautics. Design manual for composite [M]. Beijing:Aviation Industry Press, 2001(in Chinese) [3] 崔德刚. 结构稳定性设计手册[M]. 北京:航空工业出版社, 1996 Cui Degang. Design manual for structural stability[M]. Beijing:Aviation Industry Press,1996(in Chinese) [4] Malott B, Averill R C, Goodman E D. Use of genetic algorithms for optimal design of laminated composite sandwich panels with bending –twisting coupling . AIAA-96-1538-CP, 1996. 1874~1879 [5]Liu Boyang. Composite wing structure optimization using genetic algorithms and response surfaces . AIAA-98-4854, 1998.1~12 -
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