A Novel Analytical Method to Calculate Wheel-Rail Tangential Forces and Validation on a Scaled Roller-Rig

Table 3

Geometrical data of the roller-rig used during the tests.

Symbol	Definition	Value
	Nominal roller radius	185 mm
	Nominal wheel radius (scaled 1:4)	95 mm
N	Axle-Load (N1, N2)	848 N	946 N
a	Contact ellipse longitudinal semi-axis	0.588 mm	0.610 mm
b	Contact ellipse lateral semi-axis	0.525 mm	0.544 mm