Study of Vertical Characteristics with Changes in Prepressure of Rubber Pad Used by High-Speed EMU

Table 1

Theoretical and experimental comparison of A and B stiffness.

Basic parameters		Prepressure (kN)	Static stiffness (kN/mm)
			Test results	CCCF	Unmodified formula
A	R = 113 mm; r = 40.5 mm; H = 20.5 mm; E = 2.28 MPa	34	49.68	52.25	32.88
B	R = 102 mm; r = 40.5 mm; H = 22 mm; E = 2.28 MPa	34	32.40	32.12	18.28