Shock and Vibration / 2014 / Article / Tab 2

Research Article

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

Table 2

Parameters for slab track and bridge.

NotationItemUnitValue

Slab track
Young’s modulus of railN/m22.06 × 1011
Poisson’s ratio of rail0.3
Mass moment of inertia of rail cross sectionm42 × 3.217 × 10−5
Mass per unit length of railkg/m2 × 60.64
Young’s modulus of slabN/m23.6 × 1010
Poisson’s ratio of slab0.2
Mass moment of inertia of slab cross sectionm41.6 × 10−3
Mass per unit length of slabkg/m 1.2 × 103
Spring stiffness of fastenerN/m2 × 5.0 × 107
Damping coefficient of fastenerN·s/m2 × 3.625 × 104
Spring stiffness of CA layer per unit lengthN/m22 × 1.5 × 109
Damping coefficient of CA layer per unit lengthN·s/m22 × 8.3 × 104
Bridge
Young’s modulus of girderN/m23.45 × 1010
Poisson’s ratio of girder0.2
Mass moment of inertia of girder cross sectionm412.744
Mass per unit length of bridge girderkg/m2.972 × 104
Damping ratio of girder0.05
The fundamental frequency of girderHz5.72
The second natural frequency of girderHz22.89
Spring stiffness of bearingN/m6.0 × 109
Damping coefficient of bearingN·s/m2.0 × 106