【正文】 滑動(dòng)速度 本文與李先生和鮑伯 研究工作有 關(guān) .通過分析 ,當(dāng)盤式制動(dòng)閘充分接觸時(shí) ,主要研究熱彈性不穩(wěn)定性成立與否和過熱區(qū)域的發(fā)展 .在第二部分的模型認(rèn)為摩擦墊和制動(dòng)盤肋板部分 都能夠覆蓋有限厚度 .在第三部分則專注研究部分制動(dòng)盤表面 通過墊片 接觸 的建模問題 .第四節(jié)通過評(píng)價(jià)制動(dòng)盤材料價(jià)值的增加或者是滑動(dòng)速度的范圍來介紹激發(fā)擾動(dòng)的原因 .一種基于制動(dòng)盤摩擦表面不平整和它最初擾動(dòng)幅度的分析在第五節(jié)提出了 .最后 ,第六部分提出了 在上述制動(dòng)過程最初制動(dòng)盤的不平整會(huì)引起溫度擾動(dòng)的發(fā)展模型 .這個(gè)在這里使用的模型來源于一個(gè)差分方程 ,它涵蓋了再制動(dòng)過程充分接觸激發(fā)能力的多變性 . 2,李先生和鮑伯模型的發(fā)展 制動(dòng)盤包括三層 ,中間那層的厚度為 2a3代表制動(dòng)盤的肋板部分與 a2的厚度完全連接在一起。 Hot spots 1. Introduction Formation of hot spots as well as nonuniform distribution of the contact pressure is an unwanted effect emerging in disc brakes in the course of braking or during engagement of a transmission clutch. If the sliding velocity is high enough, this effect can bee unstable and can result in disc material damage, frictional vibration, wear, etc. Therefore, a lot of experimental effort is being spent to understand better this effect (cf. Refs.) or to model it in the most feasible fashion. Barber described the thermo elastic instability (TEI)as the cause of the phenomenon. Later Dow and Burton and Burton et al. introduced a mathematical model to establish critical sliding velocity for instability, where two thermo elastic halfplanes are considered in contact along their mon interface. It is in a work by Lee and Barber that the effect of the thickness was considered and that a model applicable for disc brakes was proposed. Lee and Barber’s model is made up with a metallic layer sliding between two halfplanes of frictional material. Only recently a parametric analysis of TEI in disc brakes was made or TEI in multidisc clutches and brakes was modeled. The evolution of hot spots amplitudes has been addressed in Refs. Using analytical approach or the effect of intermittent contact was considered. Finally, the finite element method was also applied to render the onset of TEI (see Ref.).The analysis of nonlinear transient behavior in the mode, when separated contact regions occur, is even acplished in Ref. As in the case of other engineering problems of instability, it turns out that a more accurate prediction by mathematical modeling is often questionable. This is mainly imparted by neglecting various imperfections and random fluctuations or by the impossibility to describe all possible influences appropriately. Therefore, some effort aroused to interpret results of certain experiments in addition to classical TEI (see, ). This paper is related to the work by Lee and Barber [7].Us