APPROXIMATE EVALUATION OF TEMPERATURE IN A WHEEL-RAIL TRIBOSYSTEM

摘要

By using the methods of piecewise linear approximation and Green functions, we construct an approximate solution of a two-dimensional quasistationary problem of heat conduction for a half space whose surface is heated by a rapidly moving distributed heat flow. It is assumed that the constructed solution simulates, under certain conditions, the process of heat release caused by friction in a wheel-rail tribosystem. The numerical analysis demonstrates that the maximum temperature in the contact region does not exceed 450 deg C even for significant values of the slip coefficient (2 percent) and, hence, is too low for the onset martensitic transformations in steel.