A numerical model is proposed to calculate both the contact pressure and the friction torque (FT) of the friction components considering the spline friction in a wet multidisc clutch, which is verified by the bench test. The results indicate that the spline friction of components is an important factor causing the axial attenuation of contact pressure on friction pairs. As the applied pressure increases, the attenuation amplitude of contact pressure increases gradually. In addition, the average single-pair FT decreases with the increasing number of friction pairs, thus leading to the decrease of the growth rate of total FT. Therefore, when the number of friction pairs reaches a certain number, it is not reliable to obtain a good torque enhancement, indicating that the effect of spline friction needs to be weakened to reduce the attenuation of contact pressure.

中文翻译：

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湿式多片离合器摩擦力矩衰减特性的数值和实验研究

提出了一个数值模型来考虑湿式多片离合器中的花键摩擦来计算摩擦部件的接触压力和摩擦扭矩（FT），并通过台架试验进行了验证。结果表明，部件的花键摩擦是引起摩擦副上接触压力轴向衰减的重要因素。随着施加压力的增加，接触压力的衰减幅度逐渐增加。另外，平均单对FT随摩擦对数量的增加而减小，从而导致总FT的增长率降低。因此，当摩擦副的数量达到一定数量时，获得良好的扭矩增强是不可靠的，