A study of heat transfer on front and back vented brake disc affecting vibration

Abstract

The purpose of this study was to investigate the vibration characteristics of both front and back vented brake discs with physically different shapes. In accordance with theory, the heat transfer rates of the two types of brake disc were different and played an important role in deformation during usage. A dynamometer was used as an engineering tool for the experimental work, with boundary conditions according to the Japanese Automobile Standard JASO C406. One degree of freedom (DOF) acceleration signals on the brake calipers were analysed. Results indicated that the back vented brake disc reduced the vibration by up to 43.5% compared to the front vented brake disc with braking temperature at 200°C, initial braking speed 50 km/h and hydraulic pressure of 4 MPa. Hydraulic pressure at 4 MPa generated the maximum vibration. Initial braking speed and braking temperature were also important factors.