An Efficient Model for Train-Track-Bridge-Coupled System under Seismic Excitation

Table 1

Properties of train group.

Notation	Item	Unit	Trailer car	Bullet train
mc	Mass of car-body	kg	4.40 × 10^4	4.80 × 10^4
mt	Mass of bogie	kg	2.40 × 10^3	3.20 × 10^3
	Mass of wheel set	kg	2.40 × 10^3	2.40 × 10^3
Jc	Mass moment of inertia of car-body	kg·m^2	2.70 × 10^6	2.70 × 10^6
Jt	Mass moment of inertia of bogie	kg·m^2	2.20 × 10^3	7.20 × 10^3
k1z	Spring stiffness of the primary suspension	N/m	0.70 × 10^6	1.00 × 10^6
k2z	Spring stiffness of the second suspension	N/m	3.00 × 10^5	4.00 × 10^5
c1z	Damping coefficient of the primary suspension	N·s/m	4.00 × 10^4	3.00 × 10^4
c2z	Damping coefficient of the second suspension	N·s/m	5.00 × 10^4	4.00 × 10^4
Lc	Half of longitudinal distance between the centers of front and rear bogies	m	8.6875	8.6785 m
Lt	Half of bogie axle base	m	1.25 m	1.25 m
	Longitudinal distance between the center of bogie and the nearest side of car-body	m	4.90 m	4.90 m