地铁钢弹簧浮置板轨道垂向振动特性研究  

Study on the Vertical Vibration Characteristics of Steel Spring Floating Slab Track in Subway

作　　者：李响[1] 任尊松[1] LI Xiang;REN Zunsong(School of Mechanical and Electronic Control Engineering,Beijing Jiaotong University,Beijing 100044,China)

机构地区：[1]北京交通大学机械与电子控制工程学院,北京100044

出　　处：《华南理工大学学报（自然科学版）》2018年第12期103-110,120,共9页Journal of South China University of Technology(Natural Science Edition)

基　　金：国家自然科学基金重大项目(11790281).

摘　　要：针对我国部分地铁线路出现振动噪声加剧及钢轨异常波磨的现实情况,开展地铁钢轨波磨形成原因的研究.利用多体动力学仿真软件SIMPACK建立包含地铁车辆和轨道结构的车辆系统动力学模型,研究车辆-轨道系统动力学响应以及弹性轨道系统振动特性对波磨形成的影响.研究结果表明:改变轨道板长度、厚度、钢弹簧垂向刚度和跨度等轨道参数,浮置板的各阶固有频率均有所变化,但其振型特性基本不变;内侧钢轨在116和161Hz处易发生较为明显的共振现象,这可能造成波长为132和95mm内侧钢轨波磨现象的产生.综合钢轨和轨道板垂向弯曲振型以及频谱特性可知,轨道系统的垂向振动可能是造成钢轨波磨初期产生或促进其发展的主要原因,这些为此后研究钢弹簧浮置板轨道的钢轨波磨问题提供相应思路和方法.In the light of the fact that the serious track vibration noise incidents and abnormal rail corrugation were observed in some subway lines,the research on the reason of rail corrugation was carried out.Using multi-body dynamics simulation software SIMPACK to build dynamic model of subway vehicle and track structure,the response of vehicle-track system dynamic performance and vibration characteristics of the flexible rail system was studied on rail corrugation formation.The results show that changing the track parameters such as track plate length,thickness,steel spring vertical stiffness and span,the natural frequencies of track plate all vary,but the vibration characteristics of it are basically unchanged.There is an obvious resonance phenomenon in the inner rail and track plate at 116 and 161Hz,which may cause inner rail corrugation at wavelength 132 and 95mm.The vertical bending vibration modes and frequency characteristics of the both rail sides and slab track are known to be the main reasons for the initial stages or development of rail corrugation made by the vertical vibration of track system,which also provides a relevant thought and method about rail corrugation research problem of the steel spring floating slab track.

关 键 词：地铁 波磨 轨道参数 多体系统动力学 垂向振动 

分 类 号：U271.0[机械工程—车辆工程]