摘要
固有频率、振型等是反映结构动力特性的模态参数,是评价桥梁动力性能的重要依据。本文以西基桥为例,基于ANSYS平台建立了该连续刚构桥梁的有限元计算模型,并对其进行模态分析,得出了相关模态参数。在此基础上结合自由振动和环境随机振动测试结果,对该桥的自振特性进行了分析。结论可为同类型桥梁的动力特性分析提供参考。
Natural frequencies and mode shapes, the invariable modal parameters reflecting the whole properties of a structure, can be used to evaluate the whole properties of the bridge. In this paper, a 3-dimension finite element model for a continuous rigid frame bridge is established in detail and model analysis is carried out with ANSYS. The dynamic characteristics of the bridge are calculated by use of subspace iteration method. Compared with free vibration and ambient vibration test data, the validity of the calculating method is validated and satisfactory results are obtained.
出处
《公路交通科技》
CAS
CSCD
北大核心
2004年第6期78-80,共3页
Journal of Highway and Transportation Research and Development
关键词
桥梁工程
连续刚构
动力特性
模态分析
自由振动
Bridge structure
Continuous rigid frame
Dynamic characteristics
Modal analysis
Free vibration
