Dynamic Analysis of Metro Train-Monolithic Bed Track System under Tunnel Differential Settlement

Table 1

Parameters of the metro train-monolithic track system in [19].

Parameter	Value	Parameter	Value
Axle weight (kN)	132	Length of train (m)	20
Distance between two bogies of a carriage (m)	12.6	Distance between two wheelsets of a bogie (m)	2.2
Stiffness of primary suspension (kN·m^−1)	1500	Damping of primary suspension (kN·s·m^−1)	50
Stiffness of secondary suspension (kN·m^−1)	250	Damping of secondary suspension (kN·s·m^−1)	30
Linear mass density of rail (kg·m^−1)	60	Elastic modulus of rail (GPa)	210
Moment of inertia of rail (m^4)	3.217 × 10^−5	Radius of train wheel (m)	0.42
Stiffness of fastener (MN·m^−1)	52.5	Damping of fastener (kN·s·m^−1)	75
Mass density of tunnel lining (kg·m^−3)	2500	Elastic modulus of tunnel lining (GPa)	30