| 静载和疲劳荷载共同作用下结构可靠性优化设计 |
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| 引用本文： | 姜封国,王振清,白丽丽,王玉立. 静载和疲劳荷载共同作用下结构可靠性优化设计[J]. 哈尔滨工程大学学报, 2012, 0(1): 67-71 |
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| 作者姓名： | 姜封国 王振清 白丽丽 王玉立 |
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| 作者单位： | 哈尔滨工程大学航天与建筑工程学院;黑龙江科技学院建筑工程学院 |
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| 基金项目： | 黑龙江省高校青年学术骨干支持计划基金资助项目(1251G054);黑龙江省博士后基金资助项目(LBH-Z10209) |
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| 摘 要： | 通过对静载和疲劳载荷共同作用下结构系统的可靠性分析,得到了结构系统可靠性指标的计算式,并将可靠性指标作为约束函数建立优化模型,对结构的重量进行优化.采用改进的遗传算法进行结构优化设计,通过对编码方式和遗传算子的改进,使收敛性能大大改善,提高了局部搜索能力.算例表明,改进的遗传算法是一种解决静载和疲劳荷载共同作用的高效结构优化方法.
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| 关 键 词： | 优化设计 结构可靠性 静载失效 疲劳失效 |
Structural reliability optimum design under a dead load and fatigue load |
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| JIANG Fengguo,WANG Zhenqing,BAI Lili,WANG Yuli. Structural reliability optimum design under a dead load and fatigue load[J]. Journal of Harbin Engineering University, 2012, 0(1): 67-71 |
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| Authors: | JIANG Fengguo WANG Zhenqing BAI Lili WANG Yuli |
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| Affiliation: | 1.College of Aerospace and Civil Engineering,Harbin Engineering University,Harbin 150001,China;2.School of Civil Engineering,Heilongjiang Institute of Science & Technology,Harbin 150027,China) |
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| Abstract: | Structural reliability under a dead load and fatigue load was analyzed,and a calculated formula of the structural reliability index was obtained.Then the reliability index was considered as a restricted function to develop an optimum model,and the structural weight was optimized.An improved genetic algorithm was adopted to carry out structural optimum design,and the code mode and genetic operator were improved.The convergence performance was also improved greatly,and the local search ability was increased.Calculated examples indicate that the improved genetic algorithm is a highly effective method to produce the optimum structural reliability design under a dead load and fatigue load. |
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| Keywords: | optimum design structural reliability dead load failure fatigue failure |
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