摘要
在现有结构优化理论的基础上,列出所有可能的变数,分析其可行域及步长,确定各变数优化流程,以总造价指数最小为目标函数,建立优化设计的数学模型,利用MIDAS Civil有限元分析程序对拟定的设计变数进行结构受力分析;在采用试探法研究变数变化的情况下,对结构受力和造价指数响应的敏感程度进行回归分析,得出闭合框架合理的截面形式。
On the basis of the existing structure optimization theory, all possible variables are listed. The article analyzes the feasible region and step length of variable, and defines the optimization process of each variable. According to the objective function of the minimum total cost index, the optimization design of mathematical model is established. The finite element analysis program of MIDAS Civil is used to analyze the structure stress of the proposed design variable. Under the condition of studying the variable change by the trial-and-error method, the article introduces the regression analysis on the sensitive degree of structural stress and cost index response. The reasonable section form of closed framework is achieved.
出处
《城市道桥与防洪》
2016年第8期75-79,10,共5页
Urban Roads Bridges & Flood Control
关键词
闭合框架
优化设计
经济性能
试探法
closed framework
optimization design
economic performance
trial-and-error method
