Characterization of Vertical Response of Asphalt Trackbed Concrete in Railway Substructure to External Loads

Table 1

Parameters of CRH3 high-speed train [26].

Parameters	Value
Mass of car body Mc (kg)	40000
Mass of bogie Mt (kg)	3200
Mass of wheel Mw (kg)	1200
Pitch inertia of car body Jc (kg·m^2)	5.47 × 10^5
Pitch inertia of bogie Jt (kg·m^2)	6800
Stiffness of primary suspension system K1 (MN/m)	2.08
Stiffness of secondary suspension system K2 (MN/m)	0.8
Damping of primary suspension system C1 (kN·s/m)	100
Damping of secondary suspension system C2 (kN·s/m)	120
Wheelbase 2 (m)	2.5
Distance between bogie centres 2 (m)	17.375
Length of vehicle (m)	25.675
Stiffness of wheel/rail contact Kc (MN/m)	1.325 × 10^3
Axle load (kN)	140