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

Table 2

Parameters for slab track and bridge.

Notation	Item	Unit	Value
Slab track
	Young’s modulus of rail	N/m^2	2.06 × 10^11
	Poisson’s ratio of rail	—	0.3
	Mass moment of inertia of rail cross section	m^4	2 × 3.217 × 10^−5
	Mass per unit length of rail	kg/m	2 × 60.64
	Young’s modulus of slab	N/m^2	3.6 × 10^10
	Poisson’s ratio of slab	—	0.2
	Mass moment of inertia of slab cross section	m^4	1.6 × 10^−3
	Mass per unit length of slab	kg/m	1.2 × 10^3
	Spring stiffness of fastener	N/m	2 × 5.0 × 10^7
	Damping coefficient of fastener	N·s/m	2 × 3.625 × 10^4
	Spring stiffness of CA layer per unit length	N/m^2	2 × 1.5 × 10^9
	Damping coefficient of CA layer per unit length	N·s/m^2	2 × 8.3 × 10^4
Bridge
	Young’s modulus of girder	N/m^2	3.45 × 10^10
	Poisson’s ratio of girder	—	0.2
	Mass moment of inertia of girder cross section	m^4	12.744
	Mass per unit length of bridge girder	kg/m	2.972 × 10^4
	Damping ratio of girder	—	0.05
	The fundamental frequency of girder	Hz	5.72
	The second natural frequency of girder	Hz	22.89
	Spring stiffness of bearing	N/m	6.0 × 10^9
	Damping coefficient of bearing	N·s/m	2.0 × 10^6