From the perspective of the influence of normal vibration on friction, considering both normal and tangential vibrations of the vibrating plate, an experimental setup was designed independently to measure the friction at different vibration frequencies. Based on Coulomb’s friction law, a macroscopic dynamic model was established to analyze the mechanism of friction reduction affected by vibration frequencies. The results indicate that the simulation results are generally consistent with the experimental results. When the normal amplitude and average sliding velocity are constant in the presence of both normal and tangential vibration, the greater the vibration frequency, the longer the total time of sticks or the changes of friction direction per unit time will be. Consequently, this leads to more significant friction reduction at the interface and shows that Coulomb's friction law can explain the reason for friction reduction under low-frequency vibration conditions.

以法向振动对摩擦的影响为出发点, 同时考虑振动板的法向和切向振动, 自主设计实验装置, 测量不同振动频率下摩擦力的变化, 并依据Coulomb摩擦定律构建动力学模型, 从宏观尺度分析频率影响摩擦的机理。结果表明, 仿真结果与实验结果基本上吻合, 在法向和切向振动同时存在, 且法向振幅和平均滑动速度不变的条件下, 振动频率越大, 单位时间内出现黏滞或摩擦力方向改变的时间总和更长, 导致界面上滑动摩擦力的降低更明显, 因此Coulomb摩擦定律能够解释低频振动条件下摩擦力降低的原因。