摘要
为研究市域快线无砟轨道结构轻量化经济性、列车快速运行安全性协同优化设计问题,利用多体动力学软件Universal Mechanical建立车辆-轨道空间耦合模型,详细分析轨道板长度、宽度、厚度、弹性模量和扣件刚度、扣件间距单独变化时,对市域D型动车以速度160 km/h通过时所引起的轮轨系统动力响应,通过响应面实验得到市域快线无砟轨道钢轨垂向位移响应面模型,并经NAGA-Ⅱ遗传算法进行多目标优化得到最优参数组合。结果表明:通过单因素试验,对钢轨垂向位移影响显著的依次为扣件间距、扣件刚度和轨道板长度;建议在进行市域快线无砟轨道结构设计时将钢轨垂向位移作为关键评价指标;各设计变量对市域快线无砟轨道力学性能影响的主次顺序依次为扣件间距、扣件刚度、轨道板长度、轨道板宽度、轨道板厚度、轨道板弹性模量;推荐设计方案为扣件系统刚度25 kN/mm,扣件间距0.625 m,轨道板长度4.9 m,轨道板宽度2.8 m,轨道板厚度0.26 m,轨道板混凝土等级C40。
In order to study the lightweight economy of ballastless track structure and the coordinated optimization design of train rapid operation safety,a vehicle-track spatial coupling model is established by using the multi-body dynamics software Universal Mechanical.The dynamic response of wheel-rail system caused by the change of track slab length,width,thickness,elastic modulus,fastener stiffness and fastener spacing when the D-type motor train passes through the city at a speed of 160 km/h is analyzed in detail.The response surface model of rail vertical displacement of ballastless track of urban express line is obtained by response surface experiment.The optimal parameter combination is obtained by multiobjective optimization of NAGA-Ⅱgenetic algorithm.The results show that through the single factor test,the significant factors affecting the vertical displacement of the rail are fastener spacing,fastener stiffness and track slab length.It is suggested that the vertical displacement of rail should be taken as the key evaluation index in the design of ballastless track structure of urban express line.The primary and secondary order of the influences of design variables on the mechanical properties of ballastless track of urban express line are fastener spacing,fastener stiffness,track slab length,track slab width,track slab thickness and track slab elastic modulus.The recommended design parameters are fastener system stiffness 25 kN/mm,fastener spacing 0.625 m,track slab length 4.9 m,track slab width 2.8 m,track slab thickness 0.26 m and concrete grade C40.
作者
冯青松
王龙
孙魁
李秋义
FENG Qingsong;WANG Long;SUN Kui;LI Qiuyi(State Key Laboratory of Performance Monitoring and Protecting of Rail Transit Infrastructure,East China Jiaotong University,Nanchang 330013,China;Guangzhou Metro Design and Research Institute Co.,Ltd.,Guangzhou 510010,China;China Railway Siyuan Survey and Design Group Co.,Ltd.,Wuhan 430063,China;Hubei Key Laboratory of Railway Track Security Service,Wuhan 430063,China)
出处
《铁道标准设计》
北大核心
2025年第1期15-21,共7页
Railway Standard Design
基金
国家自然科学基金项目(52178423,52068029)。
关键词
市域快线
无砟轨道
响应面法
NSGA-Ⅱ遗传算法
多目标优化
urban express line
ballastless track
response surface methodology
NSGA-Ⅱgenetic algorithm
multi-objective optimization
