چكيده به لاتين
Abstract
Temperature is one of the most important parameters in designing brake systems, the present reasearch describes an experimental test and a coupled contact-thermal analysis of a railway wheel/brake block system through the braking process. A coupled simulation method was developed including numerical frictional contact, transient thermal . In the 3D simulation, the effects of the friction, the thermal expansion , and the temperature-dependent material properties were also considered. A good agreement was found between the results of the test and the calculations, for the thermal results.
First, a frictional contact FDM calculation is run. In this phase, the brake block is pressed against the wheel, which is rotating at a constant rotational speed according to the measurement. Based on the contact pressure distribution determined by the first simulation block, a transient thermal FDM calculation is performed next. The frictional heat increment is determined for each contacting node, and the frictional heat values are applied as point flux type boundary conditions in the thermal FDM model of the shoe brake.
