The Influence of Amplitude- and Frequency-Dependent Stiffness of Rail Pads on the Random Vibration of a Vehicle-Track Coupled System

Table 1

The parameters of Chinese “Type A” subway vehicle.

Parameters	Magnitude
Mass of vehicle body /(kg)	38500
Mass of vehicle bogie /(kg)	2980
Mass of vehicle wheelset /(kg)	1350
The moment of inertia of vehicle body /(kg⋅m^2)	2.5 × 10^6
The moment of inertia of vehicle bogie /(kg⋅m^2)	3.6 × 10^3
The stiffness and of the primary suspension /(N⋅m^−1)	2.1 × 10^6
The damping of the primary suspension /(N⋅S⋅m^−1)	4.9 × 10^4
The stiffness of the secondary suspension /(N⋅m^−1)	2.5 × 10^6
The damping of the secondary suspension /(N⋅S⋅m^−1)	2.0 × 10^5
The length between two bogie centers in a vehicle/(m)	18
The vehicle wheelbase/(m)	2.4