凹坑形非光滑表面微观摩擦磨损试验回归分析

Regression Analysis of Micro-Friction and Wear on Concave Non-smooth Surface

采用试验优化设计理论,利用L16(215)二水平正交表设计试验,对具有凹坑形非光滑表面形态的试件进行微观摩擦磨损试验研究,运用多元线性回归正交设计处理试验数据,得到具有凹坑形非光滑表面形态试件的体积磨损率和摩擦系数与各试验因素关系(如非光滑单元体大小、距离、速度和载荷)的回归方程.结果表明:试验因素对体积磨损率的影响程度由大到小依次为载荷、速度、单元体大小和距离;体积磨损率随着距离、速度及载荷的增加而增大,随着非光滑单元体尺寸的增加而减小,但距离和速度的交互影响很小;试验因素对摩擦系数的影响程度由大到小依次为载荷、速度、距离和单元体大小;摩擦系数随着距离、速度及载荷的增加而减小,随着非光滑单元体尺寸的增加而增大,但距离、速度及载荷的交互作用也很小.

Experiment optimum design theory was employed to design experiment scheme, and a two levels orthogonal table- L16（2^15） was adopted in the experiments. Micro-friction and wear experiments of samples with concave non-smooth surface were conducted. Experiment data were processed through multiple element linear regression and orthogonal design. Regression equations between volume wear rate, friction coefficient and experimental factors （such as size, distance, velocity, and load） of samples with concave non-smooth surface wereobtained. Experimental factors affecting wear rate in volume are, in a sequence of contribution, load, velocity, size and distance. The wear rate increased with distance, velocity and load increasing, but decreased with non-smooth unit size increasing, there is less mutual effect of distance and velocity. The experimental factors affecting friction coefficient are, in a sequence of contribution, load, velocity, distance and size, but friction coefficient decreased with distance, velocity and load increasing, there is less mutual effect of distance, velocity and load were.