機(jī)械專業(yè)畢業(yè)論文中英文翻譯--在全接觸條件下，盤式制動(dòng)器摩擦激發(fā)瞬態(tài)熱彈性不穩(wěn)定的研究(存儲(chǔ)版)
【正文】 roblem can be solved by superimposing a particular solution on the general isothermal solution. We look for the particular solution of a layer in form of a strain potential. The general isothermal solution is given by means of the harmonic potentials after Green and Zerna (see Ref. [18]) and contains four coefficients A, B, C, D for every layer. The related displacement and stress field ponents are written out in the Appendix A. 在全接觸條件下， 盤式制動(dòng)器摩擦 激發(fā) 瞬態(tài)熱彈性不穩(wěn)定 的 研究 摘要 超過臨界滑動(dòng)盤式制動(dòng)器速度可能會(huì)導(dǎo)致 形成局部過熱 ，不統(tǒng)一的接觸壓力，振動(dòng)分布，而且， 在多數(shù) 情況下， 會(huì)造成盤式制動(dòng)閘 永久性損壞。 Disc brake。 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 neg
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