Result shows : the vibration of vehicle is mainly relevant to velocity and uneven path . the higher the velocity is , the more uneven the path is , the more violent the vibration of vehicle is ; comparing dynamical response of middle bridge stride on vehicle passing bridge and on equivalent moving loads , the displacement is same but the velocity and the acceleration are different ; the result of velocity and acceleration of vehicle is big over the ground path than over the same path of bridge 结果表明：车辆的振动主要和车速及轨道不平顺有关，车速越高，轨道越不平顺，车辆振动的就越剧烈；车过桥时桥梁跨中动力响应与等效移动荷载作用下桥梁跨中动力响应比较，桥梁跨中的位移基本相近，速度和加速度则不同，等效移动荷载作用情况下的数值比较大；车辆过地面轨道不平顺时的速度、加速度比车辆过桥上同样轨道不平顺时的数值大。
According to different mechanisms , there exist several types of resonance , including the bridge resonance induced by the periodical actions of moving load series of the weights , centrifugal forces and lateral winds of vehicles , the bridge resonance induced by the loading rates of moving load series of vehicles , the bridge resonance induced by the periodical loading of train vehicles excited by rail irregularities , wheel flats and hunting movements , and the vehicle resonance induced by periodical actions of the regular arrangement of bridge spans and their deflections 根据发生机理的不同，车桥系统可能发生几种不同形式的共振，包括由车辆重量、离心力、横向平均风荷载等形成移动荷载列的周期性动力作用引起的桥梁共振，由移动荷载列加载速率引起的桥梁共振，由轨道不平顺、车轮扁疤、轮对蛇行等周期性加载引起的桥梁共振；由桥跨的规则性排列及其挠度的影响，对移动车辆形成周期性动力作用使车辆出现的共振。
By means of trigonometrical progression method and the mainline track spectrum , the sample function of the chinese mainline railway track random geometric irregularity is simulated . with the data obtained from track geometry inspection car on qinhuangdao - shenyang special line for passenger transport and arma time series model , the sample function of high - speed railway track random geometric irregularity are simulated . based on existing literature , the artificial bogie crawl waves at various different speeds are randomly simulated 根据我国干线铁路轨道谱，采用三角级数法模拟出干线铁路和准高速铁路轨道不平顺的样本函数；根据秦沈客运专线高速试验段轨检车资料，采用arma时间序列模型模拟了高速铁路轨道不平顺随机样本函数；在既有研究资料的基础上模拟出各种速度客车构架人工蛇行波；用随机变量描述道床横向刚度，并进行了随机模拟；将振动理论和稳定理论结合建立系统的分析模型和运动方程；根据monte ? carlo法编制了车辆?轨道耦合系统随机振动分析程序，进行了无缝线路随机动力响应分析，通过试验对计算模型、计算方法进行了验证。
