【摘要】 对在我国高速铁路上应用较广泛的CRH3型列车和CRTSⅡ型无砟轨道进行了精确的动力学分析.首先,对列车的车体、转向架、轮对3个主要部分进行重点分析,建立列车动力学模型;然后,以CRTSⅡ作为轨道研究对象,建立轨道动力学模型;之后,运用改进的动力分析数值积分求解算法,快速精确地获得了列车-轨道耦合振动输出;同时,将被忽略的轮轨接触点的精确定位,及轨道的衰减振动引入到列车-轨道耦合模型中,模型获得了与实际值接近的模拟结果.更多还原

【Abstract】 The precise kinetic analysis is conducted for CRH3 train and CRTSⅡ ballastless track which are widely applied to actual structure of high-speed railway system.Firstly,the train kinetic model is built by emphatically analyzing the body,bogie and track unit.Then,the track kinetic model is built through studying the CRTSⅡ track,and improved numerical integration algorithm of the dynamic analysis is used to obtain a more precise train-track coupling vibrating output.Meanwhile,the precise positioning of the wheel-rail contact point ignored in conventional modeling,and track attenuation vibration are introduced into the train-track coupling model.The simulated results obtained from the model approach the actual values.更多还原