论文部分内容阅读
基于车辆 -轨道耦合动力学理论 ,建立了车辆 -轨道垂横耦合模型 ,利用时域数值积分法在时域仿真得到耦合系统的横向随机振动响应 ,再用周期图法估计出车辆、轨道横向随机响应功率谱密度 ,利用谱分析详细研究了轨道高低、水平、方向和轨距不平顺对车辆、轨道横向随机振动的影响。结果表明 ,车辆及轮轨横向力表现为低频振动 ,主要受轨道方向和水平不平顺影响 ;钢轨和轨枕的横向振动频率分布很广 ,其低频段主要受轨道方向和水平不平顺影响 ,而高频段的振动主要由轨面垂向短波不平顺激发。
Based on the theory of vehicle-track coupling dynamics, a vehicle-rail vertical-lateral coupling model is established. The transverse stochastic vibration response of the coupled system is obtained by time-domain numerical integration in the time domain. Then, Response to power spectral density, the use of spectral analysis of a detailed study of the track height, horizontal, direction and track irregularities on the vehicle, track the random vibration of the lateral. The results show that the lateral forces of vehicle and wheel-rail show low-frequency vibration, which is mainly affected by the orbital direction and horizontal irregularity. The lateral vibration frequency distribution of rail and sleeper is very wide. The low frequency band is mainly affected by the orbital direction and level irregularity, The vibration of the frequency band is mainly excited by the vertical short-wave irregularity of the rail surface.