Numerical studies for estimation of temperature fields in bandage material during locomotive braking
Obidjon Kasimov, Sherzod Fayzibayev, Ahad Djanikulov, Sherali Mamayev
Abstract
In this paper calculation methods of estimation of rolling stock brake system wear are reviewed and temperature fields and also stresses in material of wheelpairs tires at operation are studied. Estimations of temperature fields in the tire material during braking of locomotives were studied in the course of the methodology.Assumptions were used in the considered problem, such as the choice of wheel set tire model under loads PT, sliding speed VT and friction force FT. Methods for controlling the braking power of the wheel NT in each cycle of braking time t is shown to be absorbed by part of the tire mass.Tire heating temperatures TB were calculated using the formulas with the thermal conductivity equation assumptions introduced and the results of the temperature value increment over braking time were obtained. In addition, the cooling of the tire by time was evaluated. According to the results, the tire has a tire temperature after 120 seconds, ∼ TB ≍ 30°C