Influence of Wheel Profile Wear Coupled with Wheel Diameter Difference on the Dynamic Performance of Subway Vehicles

Table 2

Main parameters of the vehicle.

Parameter	Value	Unit
Vehicle body mass	33859	kg
Vehicle body’s moment of inertia in roll	73105	kg·m^2
Vehicle body’s moment of inertia in pitch	1157173	kg·m^2
Vehicle body’s moment of inertia in yaw	1171980	kg·m^2
Frame mass	2103	kg
Frame’s moment of inertia in roll	1333	kg·m^2
Frame’s moment of inertia in pitch	864	kg·m^2
Frame’s moment of inertia in yaw	2131	kg·m^2
Wheelset mass	1018	kg
Wheelset’s moment of inertia in roll	546.7	kg·m^2
Wheelset’s moment of inertia in pitch	75	kg·m^2
Wheelset’s moment of inertia in yaw	546.7	kg·m^2
Primary suspension system’s vertical stiffness	1.3	MN/m
Primary suspension system’s vertical damping coefficient	1840	N.s/m
Secondary suspension system’s vertical damping coefficient	25 (0.15 m/s)	kN⋅s/m
Secondary suspension system’s lateral damping coefficient	58 (0.1 m/s)	kN⋅s/m