摩擦自激振动引起摩擦面波状磨耗的试验研究

在销-盘摩擦磨损试验机上进行金属干摩擦试验，研究摩擦自激振动对盘试件磨痕表面轮廓的影响，采用激光位移传感器测量盘试件摩擦表面轮廓尺寸，用加速度传感器测量销试件的摩擦自激振动.试验结果表明：在干摩擦状态下，销-盘系统容易发生持续的摩擦自激振动，当摩擦时间达到一定数值后，盘试件的磨痕表面轮廓会出现明显的波浪形磨耗，波浪形磨损机理主要是疲劳磨损.分析表明波浪形磨耗的波长近似等于摩擦自激振动的周期与滑动速度的乘积，由此推断摩擦自激振动引起了摩擦表面的波浪形磨耗.

Experimental Study on Corrugated Wear of a Sliding Surface Caused by Frictional Self-excited Vibration

A series of experimental tests were conducted on a pin-on-disc tester to study the effect of frictional self-excited vibration on evolution of the scar profile. A laser displacement sensor was used to measure the profile size of the scars. An accelerometer was used to measure vibration of the pin specimen. The test results show that a sustained frictional self-excited vibration easily occurred when a metal specimen rub against another metal specimen under dry friction. When the sliding lasted for a certain time, corrugated wear was generated on the sliding surface of the disc specimen. Fatigue wear was a main wear mechanism of corrugation. The wavelength of corrugated wear was approximately equal to the sliding speed multiplied by the period time of the friction-induced vibration. Therefore, it is concluded that the corrugated wear of disc specimens was attributed to the frictional self-excited vibration occurring in the sliding process.