Study on Brake Disc Dynamics under Asymmetric Thermal Loads 2018-01-1901
In order to explore generation mechanism of brake friction hot-spots, by pulling thermal load away from complex friction hot-spots problems，this Paper has implemented experimental study on temperature distribution characteristics and deformation characteristics of rotating disk under thermal load by using oxyacetylene flame as the heat source，and has analyzed the disk using the finite element modeling and buckling simulation analysis. Result shows that: heat source power and rotation speed of disk does not influence disk surface temperature distribution characteristics. Under function of thermal load, circumferential temperature distribution of rotating disk is relatively even, but radial direction temperature generated in heat source center and disk edge is relatively large. Radial direction temperature gradient leads to the buckling of the disk, resulting that the surface run-out of disk increases suddenly during the test and fifth-oder corrugate deformation occurs on circumference.