空间组合桥梁体系的动力特性分析

Analysis for dynamic characteristics of structure in tied arch bridge

以一拟建的某空间组合桥梁体系为研究对象,采用ANSYS程序,建立该组合桥梁体系的空间结构分析模型,利用子空间迭代法计算结构的自振周期和振型,由结构的动力特性分析可以把握整座桥的受力特点,从而为复杂空间组合桥梁的模型建立和类似桥梁结构设计提供依据。

This paper is mainly to analyze the dynamic characteristics of the structure in a tied arch bridge. Authors adopt the program of ANSYS and establishes a threedimension finite element model of the structure. The subspace is used to calculated structural natural periods and modes. On the basis of the analysis for these dynamic properties, the stress condition of the whole bridge are held and suggestions of the optimized scheme for the structure are provided. The work of this paper can be for reference of establishment of finite element model and structural design of the similar complicated structure.