基于虚拟激励法的车-轨-桥耦合系统的随机振动响应分析
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摘要
轨道随机不平顺作为引起车辆-轨道-桥梁耦合系统振动的最重要的激励源,对列车过桥平稳性有着至关重要的影响.建立车辆-轨道-桥梁耦合垂向振动模型,采用虚拟激励法,计算随机不平顺激励下车辆运行的平稳性以及轨道和桥梁结构的振动特性,避免了繁复的时频转换和复杂的数值积分.数值分析了不同速度下列车过桥的平稳性和列车对不平顺波长的敏感范围.经过分析得到,列车运行速度越大,过桥平稳性指标越大,即舒适性越差;而且影响列车平稳性的不平顺波长越长,其影响范围越大.
As the most important excitation source for the vibration of vehicle-track-bridge coupling system, the stochastic irregularity of the track has a vital influence on the ride quality of the vehicle. In this paper, a vehicle-track-bridge coupling model was established. To avoid the complicated time-frequency transformation and numerical integral calculation, the pseudo-excitation method was used to calculate the vibration characteristics of the vehicle, track and bridge under the random irregular excitations. The ride qualities and the sensitive range of the irregularity wavelength at different vehicle velocities are presented. Results reveal that if the vehicle velocity increases, the Sperling index goes higher as well, and results in a longer wavelength and wider range of the vehicle sensitive irregularity.
As the most important excitation source for the vibration of vehicle-track-bridge coupling system, the stochastic irregularity of the track has a vital influence on the ride quality of the vehicle. In this paper, a vehicle-track-bridge coupling model was established. To avoid the complicated time-frequency transformation and numerical integral calculation, the pseudo-excitation method was used to calculate the vibration characteristics of the vehicle, track and bridge under the random irregular excitations. The ride qualities and the sensitive range of the irregularity wavelength at different vehicle velocities are presented. Results reveal that if the vehicle velocity increases, the Sperling index goes higher as well, and results in a longer wavelength and wider range of the vehicle sensitive irregularity.
引文
[1]ZHAO C F,ZHAI W M.Maglev vehicle/guideway vertical random response and ride quality[J].Vehicle System Dynamics,2002,38(3):185-210.
[2]陈果.车辆-轨道耦合系统随机振动分析[D].成都:西南交通大学,2000.
[3]LIN J H.A fast CQC algorithm of PSD matrices for random seismic responses[J].Computers&Structures,1992,44(3):687-689.
[4]LIN J H,ZHANG W S,LI J J.Structural response to arbitrarily coherent stationary random excitations[J].Computers&Structures,1994,50(5):629-633.
[5]LIN J H,LI J J,ZHANG W S,et al.Non-stationary random seismic responses of multi-support structures in evolutionary inhomogeneous random fields[J].Earthquake Engineering and Structural Dynamics,1997,26(1):135-145.
[6]张亚辉,林家浩.多点非均匀调制演变随机激励下结构地震响应[J].力学学报,2001,33(1):87-95.
[7]孙东科,林家浩,张亚辉,等.复杂结构风激随机振动分析[J].机械工程学报,2001,37(3):55-58.
[8]刘元芳,林家浩.考虑流体和土壤耦合效应的桩基平台非线性随机地震响应分析[J].计算结构力学及其应用,1991,8(1):37-44.
[9]ZHANG L P,GUO L X.A pseudo excitation method for vehicle vibration analysis in uneven speeds[J].Applied Mechanics and Materials,2010,29(32):1550-1555.
[10]周劲松,李大光,张祥韦,等.平稳性快速算法及其在高速铁道车辆动力学分析中的应用[J].铁道学报,2008,30(6):36-39.
[11]孟建军,杨泽青,蒲光华,等.基于虚拟激励法的轨道车辆垂向振动响应分析[J].中国铁道科学,2012,33(2):89-94.
[12]张辉,姚林泉,赵乾峰,等.复合轨道不平顺对车辆-轨道-桥梁耦合系统的影响[J].力学季刊,2013,34(4):599-606.
[13]翟婉明.车辆-轨道耦合动力学[M].3版.北京:科学出版社,2007.
[14]翟婉明,夏禾.列车-轨道-桥梁动力相互作用理论与工程应用[M].北京:科学出版社,2011.
[2]陈果.车辆-轨道耦合系统随机振动分析[D].成都:西南交通大学,2000.
[3]LIN J H.A fast CQC algorithm of PSD matrices for random seismic responses[J].Computers&Structures,1992,44(3):687-689.
[4]LIN J H,ZHANG W S,LI J J.Structural response to arbitrarily coherent stationary random excitations[J].Computers&Structures,1994,50(5):629-633.
[5]LIN J H,LI J J,ZHANG W S,et al.Non-stationary random seismic responses of multi-support structures in evolutionary inhomogeneous random fields[J].Earthquake Engineering and Structural Dynamics,1997,26(1):135-145.
[6]张亚辉,林家浩.多点非均匀调制演变随机激励下结构地震响应[J].力学学报,2001,33(1):87-95.
[7]孙东科,林家浩,张亚辉,等.复杂结构风激随机振动分析[J].机械工程学报,2001,37(3):55-58.
[8]刘元芳,林家浩.考虑流体和土壤耦合效应的桩基平台非线性随机地震响应分析[J].计算结构力学及其应用,1991,8(1):37-44.
[9]ZHANG L P,GUO L X.A pseudo excitation method for vehicle vibration analysis in uneven speeds[J].Applied Mechanics and Materials,2010,29(32):1550-1555.
[10]周劲松,李大光,张祥韦,等.平稳性快速算法及其在高速铁道车辆动力学分析中的应用[J].铁道学报,2008,30(6):36-39.
[11]孟建军,杨泽青,蒲光华,等.基于虚拟激励法的轨道车辆垂向振动响应分析[J].中国铁道科学,2012,33(2):89-94.
[12]张辉,姚林泉,赵乾峰,等.复合轨道不平顺对车辆-轨道-桥梁耦合系统的影响[J].力学季刊,2013,34(4):599-606.
[13]翟婉明.车辆-轨道耦合动力学[M].3版.北京:科学出版社,2007.
[14]翟婉明,夏禾.列车-轨道-桥梁动力相互作用理论与工程应用[M].北京:科学出版社,2011.
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