Determining Effects of Wagon Mass and Vehicle Velocity on Vertical Vibrations of a Rail Vehicle Moving with a Constant Acceleration on a Bridge Using Experimental and Numerical Methods

Table 2

Bogie and bridge parameters for 1 : 5 scaled roller rig.

Parameters	Values
: stiffness of bridge (MN/m)	319.2
: mass of the wagon (kg)	166, 199
: mass of the bogie frame (kg)	24
: distance between two centers of axles (m)	0.6
: moment of inertia of the bogie frame (tm^2)	0.00128
, : masses of front and rear wheel (kg)	14.4
, : stiffness of primary suspension system (MN/m)	0.8
, : stiffness of Hertz contact region (MN/m)	203.109
, : damping of Hertz contact region (kNs/m)	16
: stiffness of secondary suspension system (MN/m)	0.4
, : damping of primary suspension system (kNs/m)	0.16
: damping of secondary suspension system (kNs/m)	0.64