粒子群优化
非线性系统
流离失所(心理学)
计算
数学
算法
极限(数学)
数学优化
非线性规划
过程(计算)
控制理论(社会学)
计算机科学
数学分析
控制(管理)
操作系统
心理治疗师
人工智能
物理
量子力学
心理学
作者
Iman Mansouri,Ali Shahri,Hassan Zahedifar
标识
DOI:10.31436/iiumej.v17i2.581
摘要
Solving systems of nonlinear equations is a difficult problem in numerical computation. Probably the best known and most widely used algorithm to solve a system of nonlinear equations is Newton-Raphson method. A significant shortcoming of this method becomes apparent when attempting to solve problems with limit points. Once a fixed load is defined in the first step, there is no way to modify the load vector should a limit point occur within the increment. To overcome this defect, displacement control methods for passing limit points can be used. In displacement control method, the load ratio in the first step of an increment is defined so that a particular key displacement component will change only by a prescribed amount. In this paper the load ratio is obtained using particle swarm optimization (PSO) algorithm so that the complex behavior of structures can be followed, automatically. Design variable is load ratio and its unbalanced force is also considered as objective function in optimization process. Numerical results are performed under geometrical nonlinear analysis, elastic post-buckling analysis and inelastic post-buckling analysis. The efficiency and accuracy of proposed method are demonstrated by solving these examples. Â
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