DYNA JOURNAL ENGINEERING

Key words:

nuevo guardarraíl, curvatura de raíl, velocidad de tren, análisis de vibraciones, ingeniería ferroviaria, new guard rail, curve rail, freight train, vibration analysis, railway engineering

Article type:

ARTICULO DE INVESTIGACION / RESEARCH ARTICLE

Section:

RESEARCH ARTICLES

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 vibration 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 elastic system dynamics and the "sit-in-right-position" principle of system matrix formation. The corresponding calculation program was compiled with FORTRAN language. Model accuracy was verified by field test. Calculation results demonstrated that under test conditions and parameters, data matching between the calculated maximum horizontal force of guard rail and measured value reached as high as 99.55%. Meanwhile, data matching between the calculated maximum inner wheel-guard rail contact frequency and the measured value is reported to be 91.96%. The new guard rail can improve the riding stability of freight train and reduce lateral displacement of the outer rail of the curve. When the radii of the changing curve are 250, 300, 350 and 400 m, the new guard rail undertakes 39.34%, 38.81%, 36.71% and 35.99%, respectively, of the horizontal 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.