Mathematical Problems in Engineering / 2019 / Article / Tab 2

Research Article

Numerical Investigation into the Critical Speed and Frequency of the Hunting Motion in Railway Vehicle System

Table 2


NotationParameterValueUnit

Car body mass28000kg
Bogie frame mass3000kg
Wheelset mass2400kg
Roll moment of inertia of car body84560kg·m2
Yaw moment of inertia of car body1102730kg·m2
Roll moment of inertia of bogie frame2106kg·m2
Yaw moment of inertia of bogie frame2600kg·m2
Yaw moment of inertia of wheelset1029kg·m2
Longitudinal stiffness of primary suspension85MN/m
Lateral stiffness of primary suspension15MN/m
Vertical stiffness of primary suspension1.1MN/m
Longitudinal stiffness of secondary suspension0.2MN/m
Lateral stiffness of secondary suspension0.2MN/m
Vertical stiffness of second suspension0.2MN/m
Lateral damping of primary suspension10kN·s/m
Vertical damping of primary suspension20kN·s/m
Lateral damping of secondary suspension30kN·s/m
Vertical damping of secondary suspension10kN·s/m
Series stiffness of yaw damper10MN/m
First stage damping of yaw damper300kN·s/m
Second stage damping of yaw damper20kN·s/m
Blow-off force of yaw damper3000N
Blow-off velocity of yaw damper0.01m/s
Half of track gauge0.7465m
Half of primary spring arm1m
Half of secondary spring arm1.23m
Half of secondary vertical damping arm1.323m
Half of yaw damper arm1.35m
Vertical distance from car body center of gravity to secondary suspension0.852m
Vertical distance from car body center of gravity to secondary lateral damping0.97m
Vertical distance from bogie frame center of gravity to secondary suspension0.162m
Vertical distance from bogie frame center of gravity to wheelset center0.148m
Vertical distance from bogie frame center of gravity to secondary lateral damping0.044m
Longitudinal distance from bogie frame center to car body center8.75m
Half of wheelbase1.25m
Longitudinal creep force coefficient8.4MN
Lateral creep force coefficient8.4MN
Lateral/spin creep force coefficient3000N·m2
Spin creep force coefficient16N
Axle load10900kg
Normal force acting on wheelset53410N
Coefficient of friction0.3
Acceleration of gravity9.8m/s2

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