Estimation of Cement Asphalt Mortar Disengagement Degree Using Vehicle Dynamic Response

Table 1

Properties for CRH2 EMU trailer.

Property	Unit	Symbol	Value
Mass of car body	kg		26100
Mass of bogie	kg		2600
Mass of wheel	kg		2100
Pitch moment of inertia of car	kg·m^2		1.28 × 10^6
Pitch moment of inertia of bogie	kg·m^2		1424
Stiffness of primary suspension	N/m		1.176 × 10^6
Stiffness of secondary suspension	N/m		9.91 × 10^5
Damping of primary suspension	N·s/m		1.02 × 10^6
Damping of secondary suspension	N·s/m		1.96 × 10^5
Half of rigid wheelbase	m		1.25
Half of length between the bogie pivot centers	m		8.75
Radius of wheel	m		0.43