Finite Element Analysis Of Wheel/Rail Rolling Contact Process

The railway transportation has the merits of big carrying capacity, high transportation velocity, few energy consumption, low transportation cost, etc, It plays very important role in the entire national economy development. In recent years, railway transportation development has the tendency of high speed, heavy load, great transportation amount and high density, the railway transportation creates huge economic benefit. But because of the high speed and heavy load, It brings many wheel track relations questions, for example, rail wave-shape abrasion, rolling contact fatigue, derailed, become more and more serious. Wheel rail contact stress computation is the foundation of wheel track relations studies. Therefore, correct analysis and computation of wheel rail contact stress has big significance regarding to the enhance the security and efficiency of railway transportation.This article uses three dimensional modeling software Pro/E to build the model, considered the real wheel and the rail geometry shape and the boundary condition, uses commodity finite element analysis software ANSYS/LS-DYNA as the tool to carries on the analysis, In the model, wheel is worn Tread wheel, namely LM Tread wheel, rail is 60Kg/m rail. The paper carries the contact analysis between LM Tread wheel and rail respectively as the rail base slope is 1:20 and 1:40.The result indicates that in 1:20 rail base slope conditions, the contact stress is smaller obviously than the 1:40 situation. Through the transformation the value of the main arc radius(ρa) and the center position(S2) of arc of the LM tread to carries on the analysis, result indicates that in the condition of 1:20 rail base slope, the LM tread and rail are at in good match condition, And in 1:40 rail base slope condition, through increases the main arc radius(ρa) or reduces its center position(S2) can reduce the taper of the tread, improve wheel track match condition. The paper also carry on the analysis of vehicles passes curve conditions, Compares the wheel rail contact stresses in different wheel lateral displacements,analysis wheel/rail contact stress in different transition arc radius and lateral force.