华东交通大学学报Issue(2)：23-28,6.
大跨度变截面梁沿导梁推送架设时的振动响应分析
Vibration Response Analysis of Large Span Varying Cross-section Beam in Erection along the Guide Beam
王建平 1黄逸辉 1郑峰1
作者信息
- 1. 解放军理工大学野战工程学院，江苏 南京 210007
- 折叠
摘要
Abstract
Large span assembled bridge is a kind of emergency bridge pushed to erect along the guide beam, whose vibration response analysis is that of varying cross-section beam in push moving state. This paper firstly applies Rayleigh method to establish the dynamic equations under moving conditions and obtains the solutions. Then it us⁃es spatial finite element method to establish the finite element model of the vibration system and calculate the ana⁃lytical results. Finally with wireless transmission a modal test of large span bridge under ambient excitation is car⁃ried out to get relevant test results. Results from the three kinds of methods for dynamic vibration characteristics are consistent. This study concludes that the external excitation should avoid the first order natural frequency of vertical or transverse vibrations;the vertical amplitude of structure system is much larger than the transverse am⁃plitude;and the imbalance of mechanisms on both sides of the erection device will cause the torsional vibration. It provides a technical support for erecting operation and dynamic response analysis of erecting large span assem⁃bled bridges.关键词
变截面梁/推送架设/振动响应/瑞利分析法/环境激励与测试/有限元分析Key words
varying cross-section beam/push erection/vibration response/Rayleigh analysis method/ambient ex-citation and test/finite element analysis分类
交通工程引用本文复制引用
王建平,黄逸辉,郑峰..大跨度变截面梁沿导梁推送架设时的振动响应分析[J].华东交通大学学报,2015,(2):23-28,6.
