噪声与振动控制2018，Vol.38Issue(2)：133-137,5.DOI:10.3969/j.issn.1006-1355.2018.02.026
跳车冲击过程中的桥梁动态位移响应分析
Analysis of Dynamic Displacement Response of Bridges under Vehicle's Impact
周子骥 1高芳清 1米聪聪1
作者信息
- 1. 西南交通大学 力学与工程学院,成都610031
- 折叠
摘要
Abstract
With a quarter of the simplified vehicle and the damped simply supported girder bridge as the object, the vehicle-bridge coupling dynamic model is established for analyzing the impact process between the vehicle and the bridge. The numerical solution of vehicle-bridge coupling vibration response is obtained by using Newmark-β integral method.The displacement responses of the vehicles under the conditions of different impact heights,impact positions on the bridge and two vehicles impacts are derived.Characteristics of the vertical dynamic displacement of the bridge under the impact of the vehicle jumping are discussed. The numerical analysis shows that the different heights of the vehicle jolting have little influences on the peak value of the vertical displacement response. The vertical dynamic displacement of the bridge is different when the vehicle jumps at different positions.Near the middle of the span,the influence of the vehicle jumping on the vertical displacement of the front half-span is much larger than that of the rear half-span.While for the position far away from the middle of the span,the dynamic displacement value of the front half-span of the bridge is close to that of the rear half span.The maximum vertical dynamic displacement of the bridge demonstrates hysteresis characteristics.The influence of different speed on the vertical displacement of bridge is different.关键词
振动与波/车桥耦合振动/跳车冲击/竖向动态位移/跳车高度Key words
vibration and wave/vehicle-bridge coupling vibration/vehicle impact/vertical dynamic displacement/jumping height分类
数理科学引用本文复制引用
周子骥,高芳清,米聪聪..跳车冲击过程中的桥梁动态位移响应分析[J].噪声与振动控制,2018,38(2):133-137,5.
