轨道不平顺激励下车桥耦合系统的车辆平稳性研究  

Studies on The Vehicle Running Stability of Vehicle-bridge Coupled System under the Irregularity of Track

作　　者：何英萍[1] 朱忠奎[1] 鞠华[1] 邱哲峰[1] 

机构地区：[1]苏州大学城市轨道交通学院,江苏省苏州市15137

出　　处：《农业装备与车辆工程》2012年第12期17-21,30,共6页Agricultural Equipment & Vehicle Engineering

基　　金：江苏省自然科学基金资助项目(BK2010225)

摘　　要：为了提高车辆的运行平稳性,基于车辆-轨道耦合动力学建立高速列车-无碴轨道-桥梁耦合系统的垂向动力学模型。运用D'Alembert原理和模态综合法,导出高速列车—无碴轨道—桥梁耦合系统的二阶常微分方程组,采用Newmark-β数值方法对系统运动方程组进行求解。以谐波型激扰模型来模拟轨道几何不平顺,研究了轨道不平顺的波长和波深对车辆平稳性的影响。结果表明:长波不平顺对Sperling指标影响较大,即对列车运行平稳性影响较大,存在最不利波长。In order to improve the vehicle running stability, a vertical coupled dynamic model of high-speed train-ballastless track-bridge system was established based on the theory of vehicle -track coupling dynamic. Using D＇Alembert principle and modal synthesis method, the second order ordinary differential equations of high-speed train-ballastless track-bridge system was derived. Vibration responses of the whole system were obtained by using the numerical method. The influence of wavelength and wave-depth on running stability is studied by the harmonic modal. The results show that, the long wave irregularity has significant influence on Sperling value, and there exists the most detrimental wavelength.

关 键 词：轨道不平顺 车辆平稳性 车辆-轨道耦合动力学 

分 类 号：U463[机械工程—车辆工程] S229[交通运输工程—载运工具运用工程]