Advances in Civil Engineering

Research Article

Theoretical Studies on the Longitudinal Inhomogeneity of Track Stiffness and a Track Status Estimation Method

Table 1

Main parameters of the railway vehicles used in the simulation.


Notation	Parameter	Value

M_c	Car body mass (kg)	46280
M_t	Bogie mass (kg)	3300
	Wheelset mass (kg)	1780
I_cx	Mass moment of the inertia of the car body about the X-axis (kg m²)	149970
I_cy	Mass moment of the inertia of the car body about the Y-axis (kg m²)	2267765
I_cz	Mass moment of the inertia of the car body about the Z-axis (kg m²)	2139900
I_tx	Mass moment of the inertia of the bogie about the X-axis (kg m²)	2673
I_ty	Mass moment of the inertia of the bogie about the Y-axis (kg m²)	1807
I_tz	Mass moment of the inertia of the bogie about the Z-axis (kg m²)	3300
I_wx	Mass moment of the inertia of the wheelset about the X-axis (kg m²)	949
I_wy	Mass moment of the inertia of the wheelset about the Y-axis (kg m²)	118
I_wz	Mass moment of the inertia of the wheelset about the Z-axis (kg m²)	967
K_px	Stiffness coefficient of the primary suspension along the X-axis (MN/m)	14.68
K_py	Stiffness coefficient of the primary suspension along the Y-axis (MN/m)	6.47
K_pz	Stiffness coefficient of the primary suspension along the Z-axis (MN/m)	1.176.
K_sx	Stiffness coefficient of the secondary suspension along the X-axis (MN/m)	0.167
K_sy	Stiffness coefficient of the secondary suspension along the Y-axis (MN/m)	0.167
K_sz	Stiffness coefficient of the secondary suspension along the Z-axis (MN/m)	0.323
C_pz	Damping coefficient of the primary suspension along the Z-axis (kN s/m)	9.8
C_sy	Damping coefficient of the secondary suspension along the Y-axis (kN s/m)	39.2
C_sz	Damping coefficient of the secondary suspension along the Z-axis (kN s/m)	9.8
L_c	Semilongitudinal distance between bogies (m)	8.75
L_t	Semilongitudinal distance between wheelsets in a bogie (m)	1.25
R₀	Wheel radius (m)	0.43