Strength design of composite beam using gradient and particle swarm optimization

被引:87
作者
Kathiravan, R. [1 ]
Ganguli, R. [1 ]
机构
[1] Indian Inst Sci, Dept Aerosp Engn, Bangalore 560012, Karnataka, India
关键词
composite; box-beam; particle swarm optimization; strength constraint; helicopter rotor blade;
D O I
10.1016/j.compstruct.2006.09.007
中图分类号
O3 [力学];
学科分类号
08 ; 0801 ;
摘要
This work addresses the optimum design of a composite box-beam structure subject to strength constraints. Such box-beams are used as the main load carrying members of helicopter rotor blades. A computationally efficient analytical model for box-beam is used. Optimal ply orientation angles are sought which maximize the failure margins with respect to the applied loading. The Tsai-Wu-Hahn failure criterion is used to calculate the reserve factor for each wall and ply and the minimum reserve factor is maximized. Ply angles are used as design variables and various cases of initial starting design and loadings are investigated. Both gradient-based and particle swarm optimization (PSO) methods are used. It is found that the optimization approach leads to the design of a box-beam with greatly improved reserve factors which can be useful for helicopter rotor structures. While the PSO yields globally best designs, the gradient-based method can also be used with appropriate starting designs to obtain useful designs efficiently. (C) 2006 Elsevier Ltd. All rights reserved.
引用
收藏
页码:471 / 479
页数:9
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