CAJ | 학술논문

针对在已有的制动盘瞬态温度场模拟中,摩擦表面摩擦生热热流密度的计算没有考虑摩擦热流在摩擦面上分布的差异,提出用摩擦功率法及摩擦副周向接触长度确定制动盘摩擦面摩擦生热热流密度的方法.根据温度场分析时的载荷和边界条件,建立制动初速200km·h~(-1)条件下列车紧急制动过程中制动盘瞬态温度场的有限元模型并进行数值分析,结果表明:在制动过程中,制动盘高温区域集中在制动盘摩擦半径至外径区域,温度最高可达289.9℃;摩擦热流对盘体内径附近区域的影响较小;能反映出制动盘和闸片周向接触长度径向分布对制动盘表面温度场分布产生的影响.
침대재이유적제동반순태온도장모의중,마찰표면마찰생열열류밀도적계산몰유고필마찰열류재마찰면상분포적차이,제출용마찰공솔법급마찰부주향접촉장도학정제동반마찰면마찰생열열류밀도적방법.근거온도장분석시적재하화변계조건,건립제동초속200km·h~(-1)조건하열차긴급제동과정중제동반순태온도장적유한원모형병진행수치분석,결과표명:재제동과정중,제동반고온구역집중재제동반마찰반경지외경구역,온도최고가체289.9℃;마찰열류대반체내경부근구역적영향교소;능반영출제동반화갑편주향접촉장도경향분포대제동반표면온도장분포산생적영향.
In the informed simulation of transient temperature field of brake discs, the distribution differ-ence of the friction heat flux on the friction surfaces has not been considered to calculate the heat flux gen-erated by friction. Aimed on the problem, a method was researched and proposed based on the friction power and circumferential contact length between the brake disc and pad. According to the necessary loads and the boundary conditions for temperature field analysis, the FEM transient temperature field model of a brake disc was established and the numerical analysis of an emergency braking process of the train at the initial velocity of 200 km · h~(-1) was carried through. The calculation results show that the high temperature sections are located from the friction radius to outside diameter on the friction surface during the simulation of the braking process, the maximum temperature can reach 289.9 ℃, and the heat flux has little impact on the regions close to inside diameter. The new method can reflect the impact of the circumferential con-tact length between the discs and pads on the temperature distribution.