基于综合非线性优化方法的倒张型悬索桥非线性优化设计

Nonlinear optimal design of under-tension suspension bridge based on synthesized nonlinear optimization method

提出随机优化、零阶优化和一阶优化相结合的综合非线性优化方法,并通过对ANSYS程序的二次开发编制全面优化设计和非线性有限元分析的综合辅助程序,从而对倒张型悬索桥进行非线性优化设计,以更合理地确定倒张型悬索桥设计中的关键因素,最终使倒张型悬索桥的受力和变形达到均匀合理的状态,以利于实际工程设计和应用。从优化设计前后的对比可以看出,本文的综合非线性优化方法和综合辅助程序简单有效,优化的效果显著。

A synthesized optimization method is presented in the paper,which is the synthesis of random optimization,zero-order optimization and first-order optimization.And the program ANSYS is secondly exploited o compile a synthesized program for the comprehensive optimization and nonlinear analysis of the under-tension suspension bridge.Then some essential aspects in the design of the bridge can be determined more appropriately so that the mechanical and deformation status of the bridge is desired to be more rational and this kind of bridge can be designed and be practiced more reasonably.From the results before and after the optimization,the synthesized optimization method and the compiled synthesized program are suitable,simple and effective for the comprehensive optimization and nonlinear analysis of the bridge.