杆件结构大变形问题的优化精确算法  

Optimization Algorithm of Large Deformation about Truss Structure

作　　者：侯祥林[1] 刘大任[2] 

机构地区：[1]沈阳建筑大学理学院,辽宁沈阳110168 [2]沈阳建筑大学学报编辑部,辽宁沈阳110168

出　　处：《沈阳建筑大学学报（自然科学版）》2006年第2期221-223,共3页Journal of Shenyang Jianzhu University：Natural Science

基　　金：辽宁省教育厅项目(20040297)

摘　　要：目的研究解决弹性杆件结构在载荷作用下产生大变形时内力和变形量的精确计算问题.方法提出了以变形后平衡状态下杆件变形量与作用力的非线性函数关系构造目标函数,以最终平衡时坐标为设计变量,建立了确定杆件结构大变形问题的无约束直接优化算法.结果通过杆件结构大变形计算方法,采用Fortran PowerSta-tion编制杆件大变形问题计算的通用程序,进行杆件大变形问题实例分析,算例表明可获得较为合理的结果.结论通过建立杆件大变形问题计算新方法,为复杂结构系统大变形问题计算,提供一种可行的分析方法.This article aims to study large deformation and internal force of elastic truss structure under load. The method being used are that making nonlinear relation of deformation and internal force of truss as objective function and coordinate of balance state as design variables, A non-constrain optimization algorithm is proposed to calculate large deformation and internal force of truss structure. Weakness of solving small deformation method is overcome. With such a result, universal program of calculating large deformation is giwen. Practical example is analyzed and rational result is obtained. The article draws the conclusion that the method can be used to define complex construction large deformation and can be used to study engineering problem.

关 键 词：杆件结构 大变形 优化算法 程序分析 

分 类 号：O343.5[理学—固体力学]