基于系统可靠度的预应力空间网格结构优化  

Optimization analysis of prestressed space grid structures based on system reliability

作　　者：张春玉 韩雪[1] 姜封国[1] 

机构地区：[1]黑龙江科技学院建筑工程学院,哈尔滨150027 [2]哈尔滨工程大学建筑工程学院,哈尔滨150001

出　　处：《黑龙江科技学院学报》2009年第5期377-379,410,共4页Journal of Heilongjiang Institute of Science and Technology

基　　金：黑龙江省教育厅科学技术研究项目(11523049)

摘　　要：为降低预应力空间网格结构系统优化分析的复杂度,提出一种利用改进的遗传算法进行结构系统可靠度约束下的最小质量优化设计的方法。该方法将系统可靠度作为结构优化控制参数,采用分枝限界法判定系统的主要失效模式,应用PNET法计算系统的可靠度。算例分析表明,该方法得到的最优个体质量相对于最佳矢量型法降低了2.82%。该方法合理有效,具有工程应用价值。This paper aimes to reduce the complexity of optimization of prestressed space grid structure system and introduces a method involving the use of improved genetic algorithm to optimal design of minimum quality under constraint of reliability of structure system. This method consists of using the reliability of system as control parameters of optimization, adopting branch-bound method to determine main failure modes, and calculating the reliability of system with PNET method. The result shows that this method gives 2.82% reduction in the optimum individual mass than the optimum vector algorithm method. The effective method is of application value in engineering.

关 键 词：预应力空间网格结构 改进遗传算法 优化分析 系统可靠性 

分 类 号：TU394[建筑科学—结构工程] O224[理学—运筹学与控制论]