基于小波分析的跳车对桥梁的振动影响

Vibration Study of Bridges Effected by Vehicle Bumping Based on Wavelet Analysis

为研究在跳车情况下,车辆荷载对桥梁振动的影响,以一双塔斜拉桥模型为研究对象,建立考虑跳车情况的车-桥耦合振动试验系统。采用连续小波变换对主梁振动信号的时频特征及能量分布进行了研究,探讨了不同路面工况下跳车对桥梁的冲击作用,得到了不同部位发生跳车时桥梁振动的响应分布规律,为桥梁设计和安全运营提供了参考依据。

Vehicles easily jump when crossing a bridge deck with large local roughness.To study the effect of vehicle load on bridge vibration,a vehicle-bridge coupling vibration experimental system considering vehicle bumping is established based on a double pylon cable-stayed bridge model.Continuous wavelet transform is adopted to analyze the time-frequency characteristics and energy distribution of the girder′s vibration signals.The impact effect of vehicle bumping on the bridge is discussed under different pavement conditions,and the distribution of the bridge vibration response is obtained with vehicle bumping at different positions.The results will provide reference for bridge design and safety operations.