Numerical Simulation of Vertical Random Vibration of Train-Slab Track-Bridge Interaction System by PEM

Table 1

Parameters for trailer car and motor car.

Notation	Item	Unit	Value
			Trailer car	Motor car
/	Mass of carbody	kg	4.4 × 10^4	4.8 × 10^4
/	Mass moment of inertia of carbody	kg·m^2	2.7 × 10^6	2.7 × 10^6
/	Mass of bogie	kg	2.4 × 10^3	3.2 × 10^3
/	Mass moment of inertia of bogie	kg·m^2	2.2 × 10^3	7.2 × 10^3
/	Mass of wheelset	kg	2.4 × 10^3	2.4 × 10^3
/	Spring stiffness of the second suspension system	N/m	6.0 × 10^5	8.0 × 10^5
/	Damping coefficient of the second suspension system	N·s/m	8.0 × 10^4	9.0 × 10^4
/	Spring stiffness of the primary suspension system	N/m	1.4 × 10^6	2.08 × 10^6
/	Damping coefficient of the primary suspension system	N·s/m	8.0 × 10^4	6.0 × 10^4
/	Longitudinal distance between the center of bogie and the nearest side of carbody	m	3.45	3.45
/	Half of longitudinal distance between the centers of front and rear bogies	m	8.6875	8.6875
/	Half of bogie axle base	m	1.25	1.25
/	The fundamental frequency for vertical motion of carbody	Hz	0.75	0.84
/	The fundamental frequency for pitching motion of carbody	Hz	0.84	0.97
/	The fundamental frequency for vertical motion of bogie	Hz	6.00	4.78
/	The fundamental frequency for pitching motion of bogie	Hz	7.10	6.28