| 复合材料层合板的可靠性优化和鲁棒特征 |
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| 引用本文： | 王向阳,陈建桥.复合材料层合板的可靠性优化和鲁棒特征[J].华中科技大学学报(自然科学版),2006,34(8):94-96. |
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| 作者姓名： | 王向阳 陈建桥 |
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| 作者单位： | 1. 武汉理工大学,交通学院,湖北,武汉,430063
2. 华中科技大学,力学系,湖北,武汉,430074 |
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| 摘 要： | 采用遗传算法分析了存在初始缺陷的复合材料层合板的可靠性优化和鲁棒问题．单元层可靠性分析时，取初始缺陷、强度参数为随机变量，采用一阶矩法和Tsai—Wu准则分析每个单元层的失效概率．系统失效概率的计算基于首层失效假定，把系统看作为单元层的串联结构，系统中任何一个单元层的破坏就看作为系统的失效．在此基础上，对结构的可靠性优化和鲁棒特征进行了研究，分析了对称层合板的层数、可靠度和纤维方向角之间的关系，为结构设计提供参考．
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| 关 键 词： | 复合材料 可靠性 鲁棒 遗传算法 |
| 文章编号： | 1671-4512（2006）08-0094-03 |
| 收稿时间： | 2005-05-02 |
| 修稿时间： | 2005年5月2日 |
Reliability optimum and robust characteristics of composites |
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| Wang Xiangyang,Chen Jianqiao.Reliability optimum and robust characteristics of composites[J].JOURNAL OF HUAZHONG UNIVERSITY OF SCIENCE AND TECHNOLOGY.NATURE SCIENCE,2006,34(8):94-96. |
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| Authors: | Wang Xiangyang Chen Jianqiao |
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| Abstract: | A reliability-based optimum model of composite plates with initial imperfection was presented,and the genetic algorithm was used to solve the problem.In the reliability analysis,the initial imperfection,strength parameters were treated as random variables.Ply-level failure probability was evaluated by the first order reliability method and the Tsai-Wu criterion.A laminated structure was treated as a series system consisting of a number of components(plies).The occurrence of any one of the ply-level failure was defined as the system failure.Based on this,the optimum structures with the thickness and the ply angle as the design parameters were studied and the robust characteristics of them were discussed. |
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| Keywords: | composites reliability robustness genetic algorithm |
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