润滑状态下导轨结合面法向动态接触刚度实验研究

建立了圆柱微凸体的接触模型，该模型在微观层面上以圆柱形微凸体的接触代替两平面的接触，更加符合磨削加工的实际表面。在动态信号测试系统中，测试了直线滑动导轨结合面的动态特性参数，准确获得了法向接触动态刚度，并分析了载荷、速度、有无润滑对动态刚度的影响规律。实验结果表明：增加润滑油膜、降低滑动速度、增大载荷都可以增大导轨结合面的法向动态接触刚度。

Experimental Study on Normal Dynamic Contact Stiffnesses of Trail Interfaces under Lubrications

A fractal contact model of cylindrical micro convex body was established, and the contact of the two planes were replaced by cylindrical asperity contacts in the micro levels, which were more in line with the actual grinding surfaces. In the dynamic signal test system, the dynamic characteristic parameters of the interfaces were tested. The normal dynamic contact stiffnesses were obtained exactly and the influences of loads, speeds, and lubrications on the dynamic stiffnesses were analyzed. The experimental results show that increasing the fluid films, decreasing the sliding speeds and increasing the loads may improve the normal dynamic contact stiffnesses of the trail interfaces.