移动轨道车辆作用下桥梁损伤仿真及识别分析

Damage Detection Analysis of Bridge under Moving Railway Vehicle

结合小波分析技术及建立的损伤定位指标,针对移动轨道车辆与桥梁的耦合振动信号,提出了适用于大跨度轨道交通桥梁损伤分析方法。建立了精细的三跨连续梁桥与轨道车辆耦合振动数值分析模型,考虑了复杂的车辆自身振动、轨道不平顺及噪声等因素的影响,通过损伤仿真及识别试验,证明了该方法的可行性与有效性。

Based on the wavelet analysis technique and damage detect index according to the couple dynamic responses signal between the bridge and moving railway vehicle, the damage detection procedure for long-span railway-bridge was proposed. The refined couple vibration numerical model of the three span bridge and railway vehicle was established. Through the simulation and damage analysis test which considered the effect of vehicle self vibration, track irregularity and the noise, the efficiency and effectiveness of the method was verified.