Frictionally-Exited Thermoelastic Instabilities in Automotive Disk Brakes

9322106刹车的巴伯摩擦加热会产生热弹性不稳定性，从而导致高速振动。这一现象在高性能系统中尤其明显，例如目前正在为汽车用途开发的系统。确定热点发展的临界速度的分析方法将从半有限条件扩展到实际制动系统的有限尺寸。该方法假定初始小扰动随时间呈指数增长，将问题转化为仅在空间维上的特征值问题，并用有限元方法进行离散。验证结果的平行实验将在联合信号公司的摩擦材料部进行。***

9322106 Barber Frictional heating of brakes generates thermoelastic instabilities which can result in vibrations at high speed. The phenomenon is particularly pronounced in high performance systems, such as those which currently are under development for automotive uses. Analytical methods for determining critical speeds of hot spot development will be extended from semifinite conditions to the finite dimensions of actual brake systems. The approach assumes exponential growth with time of an initially small perturbation, modifies the problem to an eigenvalue problem in spatial dimension only, and discretizes it by the finite element method. Parallel experiments to validate the results will be run at Allied Signal Corporation's Friction Materials Department. ***