轿车钢板表面形貌特征参数的提取

通过对典型轿车钢板表面形貌的分析，以形貌与其摩擦学性能的关系为出发点，对粗糙表面、粗糙峰和粗糙谷的分布特性进行了统计分析。结果表明：粗糙表面、粗糙峰和粗糙谷数的统计分布特性与润滑及接触等性能密切相关；针对轿车钢板表面、粗糙峰和粗糙谷数在高度方向概率分布曲线的非Gauss特性，提出采用Weibull概率密度函数的非线性曲线拟合对分布特征进行分析处理。所得拟合参数具有非常明确的物理意义，所此可以采用少量参数来较全面地描述其对应的轿车钢板表面形貌特征分布。

Establishment of Surface Profile Parameters of Sedan Steel Plates

The distributions of surface height, surface asperity and valley number of various sedan steel plates were analyzed by correlating the surface profile features with the tribological behavior. As the results, these distributions are correlative with the lubrication performance and contact behavior of the surfaces. A kind of non linear curve fit method based on Weibull probability density function was adopted for the analysis of the distributions because of their non Gauss distribution feature. Some important parameters with explicit physical meanings are established by the curve fit method. Thus it is feasible to express the characteristic distributions of the surface profiles of various sedan steel plates using lessened parameters as alternatives of the probability density functions.