Study on Transmission Characteristics of Vertical Rail Vibrations in Ballast Track

Table 1

Model parameters.

Track component	Parameter	Symbol	Value
Rail	Young’s modulus (GPa)		210
	Shear modulus (GPa)		80.8
	Cross-sectional area (m^2)		7.745 × 10^−3
	Mass density (kg/m^3)		7750
	Shear correction factor		0.5329
	Area moment of inertia (m^4)		3.217 × 10^−5
Rail pad	Vertical stiffness (kN/mm)		225
	Damping loss factor		0.25
	Length (m)		0.17
Sleeper	Sleeper spacing (m)		0.55
	Mass (half sleeper) (kg)		170
	Moment of inertia (kg·m^2)		1.22
	Length (m)		0.275
Ballast	Vertical stiffness (per half sleeper) (kN/mm)		20
	Damping loss factor		1