Estimation of Cement Asphalt Mortar Disengagement Degree Using Vehicle Dynamic Response

Table 2

Properties for high-speed line.

Property	Unit	Symbol	Value
Elastic modulus of rail	N/m^2		2.059 × 10^11
Rotational inertia of rail	m^4		3.217 × 10^−5
Mass of rail per unit length	kg/m		60.64
Stiffness of rail pad	N/m		6 × 10^7
Damping of rail pad	N·s/m		7.5 × 10^4
Length between fasteners	m		0.65
Length of track slab	m		6.5 m
Mass of track slab	kg		8.3 × 10^3
Elastic modulus of track slab	MPa		3.9 × 10^4
Rotational inertia of track slab	m^4		3.32 × 10^7
Stiffness of CA mortar	N/m^2		1.25 × 10^9
Damping of CA mortar	N·s/m^2		3.458 × 10^4