Wear and stability analysis of the train-curve rail system with an elastic anti-friction guard rail

Abstract

A new model to analyze the spatial vibration

of a train-curve rail system with a new guard

rail was established based on the spatial vibra

tion analysis model of a train-track system, and

in accordance with the structure characteristics

of the new guard rail. The matrix equation of

the train-curve rail dynamic coupling system

with a new guard rail was set up in accordance

with the constant total potential energy of elas

tic system dynamics and the “sit-in-right-po

sition” principle of system matrix formation.

The corresponding calculation program was

compiled with FORTRAN language. The space

vibration responses of the train-rail with a guard

rail system were calculated under three condi

tions, namely, flange way widths of 65, 70, and

75 mm between the new guard rail and the inner

rail. The model accuracy was verified through a

field test. Calculation results demonstrated that

data matching between the calculated maximum

horizontal force of the guard rail and the mea

sured value reached as high as 99.55%, 99.60%

and 98.82% under the three conditions, respec

tively. Meanwhile, other calculation results,

such as the lateral displacements of the guard

rail and the outer rail, are close to the measured

results. The great effect of the guard rail under

the condition of flangeway width with 65 mm

is also observed. In this case, the new guard rail

can reduce 14.64% of the lateral displacement

of the outer rail and improve the riding stabil

ity of the freight train. When the radius of the

changing curve are 250, 300, 350 , 400, 450,

500 and 600 m, the new guard rail undertakes

39.94%, 38.81%, 36.71% , 35.88%, 34.87%,

33.58% and 33.10% ,respectively, of the hori

zontal force of the outer rail. This agrees with

the test result that the new guard rail could share

33.3%–40% flange force of the outer rail of the

curve.