航空机轮的刹车瞬态热场模拟  

Transient thermal field simulation of aircraft wheel

作　　者：刘文胜[1] 李冰[1] 马运柱[1] 郑晓梅[1] 

机构地区：[1]中南大学粉末冶金国家重点实验室,长沙410083

出　　处：《粉末冶金材料科学与工程》2015年第2期168-174,共7页Materials Science and Engineering of Powder Metallurgy

基　　金：国家高技术研究发展计划资助项目(2009AA034300)

摘　　要：针对飞机刹车过程中,即从刹车开始到飞机刹停(开始刹车后20 s)后60 min时间段内,对整个航空机轮的瞬态温度场建立有限元模型,以滑移率为标准建立刹车过程中的动态热载荷,充分考虑热传导时多种导热方式的作用,合理施加边界条件,对航空机轮刹车瞬态热场进行模拟。模拟结果显示:刹车开始后13 s左右中间静盘达到最高温度780℃,而在刹停后1 300 s时胎角才达到最高温度165℃,刹车过程中热熔塞温度未超过热熔塞的融化温度。同时对刹车过程中航空机轮快速产热、缓慢传热、缓慢降温等特征进行分析,模拟结果与实际结果基本吻合,证明模拟方法可行,可为机轮设计提供依据。Aiming at the procedure of aircraft brake from the beginning of brake to the 60 min after aircraft stop （20 s after brake beginning）, the finite element model was established based on the aviation tire transient temperature field simulation. The dynamic brake thermal load was established according to the standards slip rate. Under the consideration of various thermal conduction modes, the boundary conditions were amply carried through. The aircraft wheel brake transient thermal field was simulated by the method of finite element numerical simulation. The results show that during braking the highest stator temperature is 780 ℃ at 13 s after brake, the highest shoulder temperature is 165 ℃ at 1 300 s after airplane stop, whereas the temperature of the hot melt plug is not higher than its working temperature. During the brake of aircraft wheels, the events e.g. quickly generating heat, slowly conducting heat and cooling were also analyzed. The simulation results are consistent with the actual values, indicating the feasibility of the simulation method, which provide the basis for wheel designing.

关 键 词：航空机轮 有限元 热场分析 飞机刹车副 

分 类 号：TF125.9[冶金工程—粉末冶金]