异型网架结构分级优化方法及其工程应用  

A MULTILEVEL OPTIMAL METHOD AND ITS ENGINEERING APPLICATION FOR HETEROTYPIC SPACE GRID STRUCTURE

作　　者：侯钢领[1] 王晓东[1] 邱继军 HOU Gang-ling;WANG Xiao-dong;QIU Ji-jun(College of Aerospace ＆ Civil Engineering,Harbin Engineering University,Harbin,Heilongjiang 150001,China;Jiangxi Zhaohui Urban Construction Co.,Ltd,Nanchang,Jiangxi 330000,China)

机构地区：[1]哈尔滨工程大学航天与建筑工程学院,黑龙江哈尔滨150001 [2]江西省朝晖城市建设工程有限公司,江西南昌330000

出　　处：《工程力学》2018年第A01期188-192,199,共6页Engineering Mechanics

基　　金：国家科技支撑计划项目(2014bak14b05);某核电设备旋转机械分析研究(KY10200170008)

摘　　要：异型网架结构具有受力复杂、形体变化大和结构参数相关性强等特点,导致该类结构的优化分析一直是研究的难点。从异型网架结构的几何特征和受力特点出发,以异型网架结构重量最轻为优化目标,提出适合于异型网架结构的分级优化模型,即第一级基于网架结构的局部约束,进行满足杆件强度和稳定的截面优化;第二级基于网架结构的整体约束,完成结构位移和整体稳定等优化。将离散变量优化和相对差商法进行结合,给出了适应于异型网架结构分级优化的计算方法。基于上述研究成果,应用ANSYS软件及其参数化语言,编制了异型网架结构的分级优化程序。以某实际工程为研究对象,通过与网架设计通用软件MST的计算结果比较,表明并验证了该文异型网架结构分级优化方法的有效性和实用性。The heterotypic space grid structure（HSGS） is featured with complex mechanical behavior, a variable structural shape and a strong correlation relationship among structural parameters. HSGS＇s optimization has always been a challenging subject. By studying geometrical characteristics and mechanical behavior of HSGS, a multilevel optimization method was proposed to minimize the HSGS weight. In the first stage, the strength and stability of HSGS members were optimized in the local constraint. In the second stage, the overall stiffness and stability of HSGS were optimized in the overall constraint. The computational optimization method for HSGS was realized by combining the discrete variable optimization design theory with the relative difference quotient algorithm. The multilevel optimization method of HSGS was programmed by using the ANSYS parameterized language. The validity of the optimization method and program were testified by comparing the results of a real engineering case from the multilevel optimization method with the results of the MST software.

关 键 词：异型网架 分级优化 离散变量 相对差商法 结构设计 

分 类 号：TU356[建筑科学—结构工程]