中文摘要：

研究目的：基于车辆-轨道耦合动力学理论建立直线电机轮轨系统仿真模型,以多种不平顺为激励源进行动力学计算,分析竖错、扣件松脱两种确定性不平顺对直线电机轮轨交通系统动力特征的影响。结合实际的轨道不平顺管理形式,探讨谐波形式的水平、扭曲以及复合不平顺对车辆运行品质的影响提供理论依据。研究结论：（1）建议在轨道不平顺管理中采用10 m弦方法,重点控制10 m左右波长的不平顺;（2）重点检查板边及板中扣件位置处的钢轨状态;（3）重点保证板端的强度满足要求;（4）严格控制轨道板的下沉量;（5）重点控制直线电机受激扰侧的尾端气隙;（6）车体垂向振动及气隙变化对扭曲不平顺最为敏感,而复合不平顺的存在对车体的横向加速度、脱轨系数及轮重减载率指标更为不利;（7）该研究结论可用于指导线路轨道结构的养护维修工作。

英文摘要：

Research purposes： Based on the theory of vehicle - track coupling dynamics, the simulation model of the linear induction motor（LIM） wheel / rail system was established. The dynamic calculation was based on a variety of irregularities. The influence of the vertical fault and the loose form of the fastener on the dynamic characteristics of the LIM rail transit system was analyzed. Combined with the actual track irregularity management mode, the influence of the level of the harmonic form, the distortion and the complex irregularity on the running quality of the vehicle was discussed. The research results provide theoretical basis for the line maintenance of the LIM wheel / rail system. Research conclusions： （1）The suggestion is that the 10 m string method is adopted in the track irregularity management. （2） Workers should focus on checking the status of the rail in the side of the plate and the position of the fastener in the plate. （ 3 ） The strength of the plate should meet the requirements. （4） Workers should strictly control the settlement of the track plate. （5）Workers should focus on the control of LIM air gap at the end of the excitation side. （6） The vertical vibration and air gap is most affected by the twist irregularity. Lateral acceleration, derailment coefficient and wheel load reduction rate of the vehicle body are affected by the complex irregularity. （7）The conclusion can beused to guide the maintenance and repair work of track structure.