Measurement and Numerical Simulation of Ground and Subgrade Vibrations of Beijing Urban Rail Line 13

Table 1

Model parameters of train and track for Beijing Urban Rail Line 13.

Vehicle		Track structure
Parameter	Value	Parameter	Value
Car body mass	5.0 × 10^4 kg	Mass per unit length of rails mR	121 kg/m
Car body pitch inertial	1.5 × 10^6 kg m^2	Flexural rigidity of rails EI	1.3 × 10^4 kN·m^2
Bogie mass	3.0 × 10^3 kg	Hysteric damping ratio of rail ηR	0.005
Bogie pitch inertial	2.1 × 10^3 kg m^2	Stiffness per unit length of rail pad layer kp	3.5 × 10^5 kN/m^2
Wheelset mass	9.0 × 10^2 kg	Hysteric damping ratio of rail pad layer ηp	0.075
Parallel stiffness of primary suspension	2500 kN/m	Mass per unit length of sleeper layer ms	416 kg/m
Series stiffness of primary suspension	1.0 × 10^12 kN/m	Mass per unit length of embankment mB	2400 kg/m
Parallel stiffness of secondary suspension	1000 kN/m	Stiffness of unit length embankment kB	1.45 × 10^4 kN/m^2
Series stiffness of secondary suspension	1.0 × 10^12 kN/m	Damping ratio of embankment material ηB	0.05
Viscous damping of primary suspension	8.0 kN s/m	Width of embankment bottom 2b	4.50 m
Viscous damping of secondary suspension	6.0 kN s/m	Hertz stiffness for two wheels kh	2.4 × 10^6 kN/m