【摘要】 飞机制动过程中刹车装置产生的高温可使摩擦材料发生热降解,导致摩擦系数变化,出现热衰退现象,影响飞机的安全性能,因此飞机刹车副瞬态温度场分析日益受到关注。针对飞机刹车副瞬态温度场建立了具有对流和热辐射两种边界条件的有限元计算模型,分析了边界条件对温度场的影响,并用ANSYS对其进行仿真计算。仿真计算得到的温度与刹车副经验温度基本吻合,证明了所建立的有限元计算模型合理、可行,为飞机刹车装置温度场分析、计算和研究提供理论支持。更多还原

【Abstract】 The heat energy generated during the braking of an aircraft has quite close relations with its safety;therefore,much research in this field has been performed.The article begins with a review of the existing literature on the temperature field of airplane braking,and reaches the conclusion that there is no theoretical mathematic model with the boundary conditions of heat convection and radiation.This article presents a three-dimensional model using the finite element method which takes into account both of the boundary conditions.The process of deriving the model is explained in detail.The numerical simulation results by ANSYS,which are in good agreement with the empirical data,show the importance of the boundary conditions and the validity of the model.This finding is potentially significant in optimizing the design of airplane disk brakes.更多还原