Mathematical Problems in Engineering / 2017 / Article / Tab 1

Research Article

Study on Transmission Characteristics of Vertical Rail Vibrations in Ballast Track

Table 1

Model parameters.

Track componentParameterSymbolValue

RailYoung’s modulus (GPa)210
Shear modulus (GPa)80.8
Cross-sectional area (m2)7.745 × 10−3
Mass density (kg/m3)7750
Shear correction factor0.5329
Area moment of inertia (m4)3.217 × 10−5

Rail padVertical stiffness (kN/mm)225
Damping loss factor0.25
Length (m)0.17

SleeperSleeper spacing (m)0.55
Mass (half sleeper) (kg)170
Moment of inertia (kg·m2)1.22
Length (m)0.275

BallastVertical stiffness (per half sleeper) (kN/mm)20
Damping loss factor1