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单击此处编辑母版标题样式,*,单击此处编辑母版文本样式,第二级,第三级,第四级,第五级,铁 道 与 城 市 轨 道 交 通 学 院,二零零七年八月十八日,车 辆 工 程 II 轨道车辆设计理论,Vehicle Engineering II-,Railway Vehicle Design Theory,Railway and Urban Mass Transit Research Institute,Introduction,Development of Railway Vehicle,inter-city vehicle,or main line vehicle,high speed vehicle,metro vehicle,light rail vehicle,mono rail vehicle,maglev vehicle,intelligent transportation vehicle,By Fengming 2023,Tongji University,Introduction,Development of Railway Vehicle,ICE:,Introduction,Development of Railway Vehicle,TGV:,Introduction,Development of Railway Vehicle,500系：,Introduction,Development of Railway Vehicle,X2023:,Introduction,Development of Railway Vehicle,TR06,Introduction,Degrees-of freedom:-,1 body with 5 dofs =5,2 bogies with 5 dofs =10,4 wheelsets with 2 dofs=8,Total=26,i.e.52 states,Introduction,Introduction,Development of Railway Vehicle Design,18251960s,Empirical Design Period,19601990s,Analytical Design Period,1990current,“Mehchatronic”Design Period,Introduction,Empirical Design,Talent,Genius,experience,prototype,improve,Very slow,Introduction,Analytical Design,Concept Design,Schematic Design,PP Design,Prototype,Running Experiment,Customer,Scientist,Researcher,Introduction,Analytical Design,Concept Design:principle design,Schematic Design or Technical Design（技术设计）：including Kinetics,Dynamics analysis,to Evaluate the ride quality,running safety,braking ability;,PP design(施工设计)：CAD,CAM,CAE(mainly including the parts strength analysis,using FEM technology);,Prototype:Test rig running test,On-line test evaluation;,Running Test:0.5million Kilometers running test,Fatigue life test;,Customers:Evaluation from the point view of customers;,Introduction,Mechatronic Design,Mechanical,system,Track inputs,Vehicle outputs,(acceleration,displacement,etc),Monitoring,system,(sensors),Electronic,controller,Actuator,system,Control,forces,Drive signals,Introduction,Mechatronic Design,Actuators,Sensors,Controller,Load changes,Body acceleration,(minimise),Suspension deflection,(constrain),Stability,(constrain),Curving performance,(optimise),Vehicle system,Track features,(deterministic),Track irregularities,(stochastic),Introduction,Mechatronic Design,Introduction,Mechatronic Design,Introduction,Contents of this lesson,1.Vehicle Dynamics:,Basic dynamic principles,Safety criterion,Ride Quality,2.Strength Analysis of Railway Vehicle Parts:,Forces acted on parts,car body,bogie,FEM analysis method,including constraints,forces applying,element selection,meshing technique,etc.,Part I:Vehicle System Dynamics,Introduction,Damper,Secondary,suspension,Primary suspension,Part I:Vehicle System Dynamics,Introduction,Secondary,suspension,Primary suspension,Part I:Vehicle System Dynamics,Introduction,Bogies,Part I:Vehicle System Dynamics,Introduction,Coned,wheel,Flange,Rail,Sleeper,Solid axle,Part I:Vehicle System Dynamics,1 Causes of Vehicle Vibration,Related to track,1.Dipped joints of rails,1 Causes of Vehicle Vibration,2.Track Vertical Deflection,1 Causes of Vehicle Vibration,3.Track local irregularity,lateral curvature,vertical curvature,super elevation,switch,rail corrugation,rail wear,Ballast irregularity(caused by temperature variation),1 Causes of Vehicle Vibration,4.Track Random irregularity,Gage:(y,l,-y,r,)/2,Cross level,:(z,l,-z,r,)/2,alignment:(y,l,+y,r,)/2,Vertical Profile,:(z,l,+z,r,)/2,1 Causes of Vehicle Vibration,4.Track Random irregularity,1 Causes of Vehicle Vibration,4.Track Random irregularity,Gage:,nominal gauge 1435mm，,gauge will be widened according curve radius（120Km/h,unbalanced value should be less then 75g.m.,Causes Related to Vehicle,Flat wheel,When wheel has flat area,momentum acted on wheel:,M,w,wheel weight,V-vehicle running speed,Its periodical time:,Causes Related to Vehicle,Hunting of Tapered Wheelset,Lateral deflection y,Yaw angle,Causes Related to Vehicle,Hunting of Tapered Wheelset,Coned,wheel,Flange,Rail,Sleeper,Solid axle,Causes Related to Vehicle,Hunting of Tapered Wheelset,Direction of travel,Causes Related to Vehicle,Hunting of Tapered Wheelset,当分析自由轮正确蛇行运动时，作如下假设：,1、轮对无任何约束，单独在轨道上滚动；,2、钢轨顶部呈刀刃状，而且是两根平行直线；,3、轮对是两个对称锥体，轮轨间无任何相对滑动；,4、不计轮对上旳任何作用力和惯性力；,则经过推导，轮正确运动方程为：,Causes Related to Vehicle,Hunting of Tapered Wheelset,where：,V Running speed;,W-angular frequency:,b half of wheelset nominal rolling radius distance,r0 nominal rolling radius,0 effective wheel conicity,Causes Related to Vehicle,Hunting of Tapered Wheelset,Hunting periodical time:,Hunting wave length:,as b increases,L,w,increases,so weaker is the hunting,The same to r0,when,0,increases,L,w,decreases,so stronger is the hunting,Causes Related to Vehicle,Hunting of Tapered Wheelset,Direction of travel,Causes Related to Vehicle,Hunting of Tapered Wheelset,The wheels are made conical,the smaller circumference at the outer edge.The pair of wheels are fixed to the axle and thus if anything throws the wheels in the slightest degree to one side the wheel is immediately rolling on a larger circumference than the other and the
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