轨道随机不平顺对地铁振动源强时-频特性影响的仿真研究  

Influence Simulation of Track Random Irregularity on Metro Vibration Source Intensity Time-Frequency Characteristics

作　　者：高文杰 谭诗磊 杨艺 高鑫[2,3] 赵才友 GAO Wenjie;TAN Shilei;YANG Yi;GAO Xin;ZHAO Caiyou(Chengdu Metro Operation Co.,Ltd.,610031,Chengdu,China;不详)

机构地区：[1]成都地铁运营有限公司,成都610031 [2]西南交通大学土木工程学院,成都610031 [3]西南交通大学高速铁路线路工程教育部重点实验室,成都610031

出　　处：《城市轨道交通研究》2023年第7期38-43,49,共7页Urban Mass Transit

基　　金：高速铁路基础研究联合基金(U1734207);国家自然科学基金面上项目(51978585);四川省应用基础研究项目(2020YJ0214)。

摘　　要：目的:为了探究轨道的多种随机不平顺(高低、水平、轨距和轨向)在不同列车速度下对地铁隧道壁垂向振动加速度和轮轨力的影响,以提升行车品质,特进行本研究。方法:以地铁A型车为例,运用动力学分析软件建立考虑柔性轮对的车辆刚柔耦合系统动力学模型。将轨道和轮对视为柔性体,其余部件视为刚体,通过施加多种随机不平顺和改变车辆速度并考虑波磨来模拟不同工况,进行仿真计算。同时采用快速傅里叶变换方法对仿真计算结果进行时域和频域分析,研究隧道壁和轮轨力的振动特性。结果及结论:研究结果表明:随着车辆运行速度的增大,隧道壁垂向振动加速度的峰值有所提高,优势频率分布范围会有稍许扩大,高频成分增多;车轮间相互作用加剧,垂向轮轨力有所增大;隧道壁在4~200 Hz范围内的振动主频为63 Hz,不随速度变化而变化,但加速度级峰值会有所增大。Objective:The impact of various track random irregularities(height,level,track gauge and track direction)on metro tunnel wall vertical vibration acceleration and wheel-rail force at different train speeds is explored for improving operation quality.Method:Taking metro A-type vehicle as example,the dynamics analysis software is used to establish a vehicle rigid-flexible coupling system dynamics model considering flexible wheelsets.By treating the track and wheelsets as flexible bodies and the rest of the components as rigid bodies,different working conditions are simulated through applying various random irregularities and changing the vehicle speed while considering corrugation for different working condition simulation to get calculation results.At the same time,the fast Fourier transform method is used to analyze the simulation results in time-domain and frequency-domain and study the vibration characteristics of tunnel wall and wheel-rail force.Result&Conclusion:Research results show that with the increase of vehicle operating speed,the peak value of tunnel wall vertical vibration acceleration will increase,the distribution range of dominant frequency will be slightly expanded with increased high-frequency components;as the interaction between wheels intensifies,the vertical wheel-rail force increases.The main vibration frequency of tunnel wall in the range of 4-200 Hz is 63 Hz,which does not change with the speed,but the acceleration peak value will increase.

关 键 词：地铁隧道 轮轨力 轨道随机不平顺 时域分析 

分 类 号：U270.11[机械工程—车辆工程]