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目前国际标准化组织推荐的粗度特征参数R_a、R_z、R_(max)都是对幅度敏感的。在某个工作范围或某一频率范围内描述粗度就不能使用这些参数。为了表征表面粗度的各种特征性就要不断增添新的特征参数。表面粗度对不同构件功能的影响是各不相
At present, the roughness parameters R_a, R_z and R_max recommended by the International Organization for Standardization are all amplitude-sensitive. These parameters can not be used to describe the thickness within a certain working range or a certain frequency range. In order to characterize the various characteristics of the surface roughness will continue to add new feature parameters. The effect of surface roughness on the function of different components is different