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Emergency braking process in the high-speed train , the braking energy , causing the temperature increase of the brake disc , and even lead to brake disc failure the temperature distribution of the brake disc , so study its impact parameter analysis of the life of the brake disc , improving working conditions and the development of new types of brake pads . Application of finite element software ABAQUS, the establishment of the brake disc , brake block model of thermal - mechanical coupling simulation speed of rotation of the brake disc and brake pad temperature distribution simulation such as friction brake pads geometry radius , height , and shape and placement of the form of the temperature field of brake disc . The following conclusions : ( 1) with the speed increases , the elevated temperature of brake discs and brake pads , the distribution of the high temperature zone banded blotchy , because with the speed increase , the vibration intensified between the friction pair , which tends to cause local contact and the formation of a local high temperature . Distribution point of view , from the circumferential direction of the brake disc temperature in the case of single cylinder brake block , the highest temperature on the brake disc corresponding to the brake block friction region ; with the change of the friction time , the temperature along the friction track The serrated fluctuations . From the temperature of the brake disc the radial distribution point of view , with increasing distance away from the center of the disc , the temperature dropped . From the disk temperature of the depth direction of the distribution point of view , with increasing depth , the temperature is decreased rapidly, after exceeding 3 ~ 6 mm away from the friction surface , the temperature change is not obvious . (2) distribution of the brake disc temperature is closely related with the radius of the brake block friction . With increasing friction radius , the average temperature of the brake disc is increased, and the increase in the distance to the maximum temperature point and the center of the disk . ( 3 ) brake block height , shape change , no significant effect on the temperature of the brake disc . (4) Brake block temperature distribution and the rotational speed, the friction radius, the height of the brake block and geometry . The rotational speed is increased, the increased radius of friction , the brake block height is reduced to increase the temperature of the brake block and the brake block of each point of the temperature distribution tends to be uniform . In addition , triangular brake blocks placed also have some influence on the temperature distribution in the form of . (5) through the The simulation showed 1:1 brake disc , brake disc appears that the highest temperature of the time lag in the maximum moment of braking velocity , the maximum temperature of the brake lining is maximum appears in the friction radius .
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