چكيده به لاتين
Thermal analysis plays a role almost in every physical process and could be a limiting agent for many processes. In addition, the thermal effects in many cases appear as a result of other physical phenomena in brake system. High temperature gradient produced by the high axial load and also the speed increase in express trains create hot points which are vulnerable to cracking and decrease the disk work life. Therefore, study of thermal analysis is critically important. Precise prediction of maximum temperature degree for designing brake system especially for disk and lining and how to reach a point with this temperature is very important. Therefore, study of various disk blades for achieving optimum blade is what have been done in this regard.
In this research in order to attain the thermal behavior of brake disk, we first solve the thermal equations in cylindrical coordination with boundary conditions of filled disk by variables' separation method. Also, following analytic solving we could approach thermal profiles of bladed disk by applying cooling displacement coefficient. Considering the complex geometry and boundary conditions of this problem (bladed disk), the analytic solution could no longer respond to the equations which in this state we need digital solutions. For digital simulation and solution, we have to use ABAQUS software. Analytic and digital solution results in two states of uniform friction and uniform pressure are studied which the results imply that temperature in uniform pressure is more than uniform friction but generally, average temperature is the same in both cases. Also, it was determined that temperature in filled disk is more than bladed disk and in comparing the type of blades it was determined that a disk with razor blade has a better cooling than pin blade
