以复合材料层合板各单层连续变化的铺层角度为设计变量, 在有限元软件中对层合板结构的基频进行优化分析, 在四边简支和固支两种不同的边界条件下, 结构的基频分别提高了4.9%和16.2%, 并对优化前后结构的静力失效强度进行了对比分析。随后将这种优化方法应用到某无人机复合材料机翼格栅结构中, 针对格栅结构蒙皮和肋板共计24个纤维铺层角度进行了优化设计, 使结构基频提高了10.6%, 同时结构的承载能力也有了一定程度的提高。
The optimization of first natural frequency of composite laminate was carried out in FEA software under Four-Edge-Simple-Support and Four-Edge-Fixing-Support boundary conditions, while the ply angles of every single layer of the laminate were confirmed as design variables. The result indicates that fundamental frequency under two boundary conditions is improved by 4.9% and 16.2%, respectively. The failure intensity of the structure before and after optimization was also analyzed comparatively. Then, the optimization method was applied in composite grid-structure aerofoil box of pilotless aircraft with the ply angles of 24 single layers of skin and ribs confirmed as design variables, and the results indicate that the fundamental frequency is improved by 10.6%. At the same time, the load capacity of the wing after optimization is improved to some degree.
参考文献
| [1] | 沈观林.复合材料力学[M].北京:清华大学出版社,2006. |
| [2] | 沈军,谢怀勤.先进复合材料在航空航天领域的研发与应用[J].材料科学与工艺,2008(5):737-741. |
| [3] | 黄风立,娄勇坚,杨亚萍,等.基于随机机会约束规划的复合材料层合板固有频率的铺层角优化设计[J].玻璃钢/复合材料,2008(4):3-6,11. |
| [4] | 罗志军.基于遗传算法的复合材料层压板固有频率的铺层角优化设计[J].上海大学学报:自然科学版,1996,2(4):443-446. |
| [5] | 尤风翔,吕福和.复合材料层合板力学性质分析及角铺设层优化设计[J].噪声与振动控制,2009(4):138-143,163. |
| [6] | 杨坤.复合材料结构可靠性与动力学综合优化方法研究[D].南京:南京航空航天大学,2010. |
| [7] | Wu Hao, Yan Ying, Liu Yujia. Reliability based optimization of composite laminates for frequency constraint[J].Chinese Journal of Aeronautics, 2008, 21(4): 320-327. |
| [8] | Sivakumar K, Iyengar N G R, Deb K. Optimum design of laminated composite plates with cutouts using a genetic algorithm [J]. Composite Strueture, 1998, 42(3): 256-279. |
| [9] | Narita Y. Layerwise optimization for the maximum fundamental frequency of laminated composite plates [J].Journal of Sound and Vibration, 200a, 263(5) - 1005-1016. |
| [10] | Narita Y, Robinson P. Maximizing the fundamental frequency of laminated cylindrical panels using layerwise optimization [J].International Journal of Mechanical Sciences, 2006, 48 (12) : 1516-1524. |
| [11] | Narita Y, Zhao Xilu. An optimal design for the maximum fundamental frequency of laminated shallow shells [J]. Solid Structure, 1998, 35(20): 2571-2538. |
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