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超声振动的应用十分广泛，关于超声振动对摩擦力的影响这个问题，已引起国内外许多学者的注意。本文对其进行了实验和理论研究。在超声振动条件下，以理论计算为基础，通过摩擦实验，得到了几种材料的超声振动摩擦特性，并且对摩擦力在共振时减小的原因进行了初步的理论分析。此外，由实验证明，碳化钨与４５＃钢组成的摩擦副是用于超声马达的理想材料。
The application of ultrasonic vibration is very extensive. The issue of the influence of ultrasonic vibration on the friction force has drawn the attention of many scholars at home and abroad. This article has carried on the experiment and the theory research. Under the condition of ultrasonic vibration, based on the theoretical calculation, the ultrasonic vibration and friction characteristics of several materials were obtained through the friction experiment, and the reason of the decrease of the friction force during the resonance was preliminarily analyzed. In addition, experiments show that the friction pair composed of tungsten carbide and 45 # steel is the ideal material for ultrasonic motors.