The instability of the temperature field distribution in clutch friction pair tends to increase exponentially with time when the relative velocity is greater than a certain critical value, which indicates the system enters a state of thermoelastic instability. During high-speed frictional sliding at a high temperature and high pressure, thermoelastic instability will generate local high temperature on friction pair and then cause high-frequency vibration, warping, fatigue fracture, and so on. With the aim of studying the problems arising from local hot spots and the mechanism behind the characteristics of temperature field in friction pair, a thermoelastic finite element analysis model was established for friction pair of heavy-duty vehicle clutch in this paper. The characteristics of thermoelastic stress and temperature distribution under different conditions were obtained by simulation analysis where different values were applied to groove distribution parameters such as number, angle, depth, and width. Experiments were carried out on a friction pair to test its thermoelastic instability. Results show that as the value of each groove distribution parameter increases, the fitting curves of the average temperature, range, and the temperature inhomogeneity coefficient of the temperature field are in forms of oscillation. The average temperature and range have the same trends. The paper concludes that the average temperature range and inhomogeneity coefficient of the temperature field distribute in order, so that the optimized structural parameters were obtained.

中文翻译：

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离合器摩擦盘直槽参数对温度场分布的影响

当相对速度大于某一临界值时，离合器摩擦副温度场分布的不稳定性随时间呈指数增加，表明系统进入热弹性不稳定状态。在高温高压下高速摩擦滑动过程中，热弹性失稳会在摩擦副上产生局部高温，进而引起高频振动、翘曲、疲劳断裂等。【摘要】：为研究摩擦副中局部热点产生的问题以及摩擦副温度场特性背后的机理,建立了重型汽车离合器摩擦副的热弹性有限元分析模型。通过模拟分析得到不同条件下的热弹性应力和温度分布特征，对凹槽分布参数如数量、角度、深度和宽度等应用不同的值。在摩擦副上进行了实验以测试其热弹性不稳定性。结果表明，随着各凹槽分布参数值的增大，温度场的平均温度、范围和温度不均匀系数的拟合曲线呈振荡形式。平均温度和范围具有相同的趋势。论文得出结论，平均温度范围和温度场的不均匀系数分布有序，从而获得了优化的结构参数。