Frictionally-Exited Thermoelastic Instabilities in Automotive Disk Brakes

汽车盘式制动器中的摩擦激发热弹性不稳定性

• 批准号: 9322106
• 负责人: James Barber
• 金额: $ 15.76万
• 依托单位: Regents of the University of Michigan - Ann Arbor
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1994
• 资助国家: 美国
• 起止时间: 1994-05-15 至 1998-04-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9322106&HistoricalAwards=false
• 关键词: Frictionally; Exited; Thermoelastic; Instabilities; Automotive

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. ***

9322106制动器的Barber摩擦加热产生热弹性不稳定性，这可能导致高速振动。 这种现象在高性能系统中特别明显，例如目前正在开发用于汽车用途的系统。 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。 该方法假设初始小扰动随时间呈指数增长，将问题修改为仅在空间维度上的特征值问题，并通过有限元法将其离散化。 验证结果的平行实验将在联合信号公司的摩擦材料部门进行。 ***