Performance Analysis of Prefabricated Steel-Spring Floating-Slab Track and Its Application to Urban Express Rail Transit

Table 1

Basic parameters of CRH6 intercity EMU train.

Parameter name	Value	Unit
Vehicle parameters
Bogie center distance (vehicle distance)	17,500	mm
Wheelbase	2500	mm
Wheel rolling-circle lateral span	1493	mm
Wheel rolling-circle diameter	860	mm
Wheelset inner distance	1353	mm
Wheel shape	LMA	—
Rail shape	CHN60	—
Mass/moment of inertia and center of gravity
Car-body quality	37.2	t
Body-roll moment of inertia	107.6	t·m^2
Car-body nodding moment of inertia	1426.8	t·m^2
Car-body shaking head moment of inertia	1402.7	t·m^2
Car-weight heart distance from rail surface	1.712	m
Frame quality	2.70	t
Frame roll moment of inertia	2.19	t·m^2
Frame nodding moment of inertia	1.48	t·m^2
Frame moving-head moment of inertia	2.70	t·m^2
Height of gravity center of frame	0.5	m
Wheelset quality	1.935	t
Wheelset rolling moment of inertia	0.95	t·m^2
Wheelset nodding moment of inertia	0.15	t·m^2
Wheelset shaking moment of inertia	0.95	t·m^2
Structural parameters
Primary suspension
Half distance of lateral span	2.10	m
Height of upper spring-loaded point from rail surface	0.876	m
Height of lower spring-loaded point from rail surface	0.681	m
Half distance of vertical-damping lateral span	2.10	m
Longitudinal damping from vertical distance to center of bogie	1.491	m
Height of upper vertical-damping point from rail surface	0.9	m
Height of lower vertical-damping point from rail surface	0.48	m
Half distance of lateral span of axle-box boom node	2.10	m
Height of axle-box boom node from rail surface	0.46	m
Longitudinal distance of axle-box arm node from center of bogie	0.77	m
Secondary suspension
Air-spring lateral span	2.02	m
Height of upper surface of air spring from rail surface	0.884	m
Height of lower surface of air spring from rail surface	0.633	m
Lateral span of anti-movement-of-snake damper	2.6	m
Longitudinal distance between anti-movement-of-snake damper and body-connection point from center of car body (inside center pin)	9.51	m
Longitudinal distance between anti-movement-of-snake damper and frame-connection point from center of car body (inside center pin)	8.79	m
Height of anti-movement-of-snake damper and car-body-connection point from rail surface	0.556	m
Height of anti-movement-of-snake damper and frame-connection point from rail surface	0.492	m
Longitudinal distance of lateral damper from center of car body	8.9	m
Lateral distance between lateral damper and vehicle-body-connection point from center line of vehicle body	1.4	m
Lateral distance between lateral damper and frame-connection point from center line of vehicle body	0.933	m
Height of lateral damper and body-connection point from rail surface	0.764	m
Height of lateral damper and frame-connection point from rail surface	0.724	m
Vertical distance of vertical damper from center of car body	8.2	m
Lateral distance between vertical damper and vehicle-body-connection point from center line of vehicle body	1.323	m
Lateral distance between vertical damper and frame-connection point from center line of vehicle body	1.323	m
Height of vertical damper and body-connection point from rail surface	0.81	m
Height of vertical damper and frame-connection point from rail surface	0.382	m
Lateral-stop lateral span	0.211	m
Height of lateral stop from rail surface	0.49	m
Height of anti-rolling torsion bar from rail surface	0.792	m
Anti-rolling torsion-bar-mount lateral span	0.952	m
Longitudinal distance of anti-rolling torsion bar from center of bogie	0.4	m
Height of connection point between traction pin and vehicle body from rail surface	0.884	m
Suspension parameters
Primary suspension
Steel-spring longitudinal stiffness (per axle box) (including damping pad)	0.9	MN/m
Steel-spring lateral stiffness (per axle box) (including damping pad)	0.9	MN/m
Steel-spring vertical stiffness (per axle box)	1.30	MN/m
Vertical damping (per axle box)	9.8	kN·s/m
Vertical-damper series stiffness	3.5	MN/m
Axle-box boom-joint longitudinal stiffness (per axle box)	17.1	MN/m
Axle-box boom-joint lateral stiffness (per axle box)	6.1	MN/m
Secondary suspension
Air-spring longitudinal/lateral stiffness	0.20	MN/m
Air-spring vertical stiffness	0.22	MN/m
Air-spring emergency rubber stiffness	13.7	MN/m
Stiffness between emergency spring and upper cover	36	mm
Lateral-damper series stiffness	3.75	MN/m
Anti-movement-of-snake-damper series stiffness	8	MN/m
Vertical damping	9.8	kN·s/m
Lateral-stop free clearance	20	mm
Anti-rolling torsion-bar equivalent stiffness (single bogie)	3.0	MNm/rad