机加工表面轮廓分形维数的两种计算方法

【摘要】 基于W-M分形函数提出了机加工表面轮廓分形维数的两种实用算法，即功率谱法和结构函数法．通过使用具有已知分形线数的W-M函数离散数据计算的结果表明，结构函数法比功率过算法准确．并且用两种算法分析了车削加工表面轮廓分形推数D与Ra之问的关系，进而表明Ra值越小，D值越大，此时的表面微观结构越精细．更多还原

【Abstract】 Two optional methods, the power spectrum method and the srructure function method, for the calculation fo the fractal dimension of a machined surface profile are discussed in this paper .Through the analysis of the results calculated by use of the Weierstass-Mandelbrot fractal fractal function with known fractal dimension, the strncture function method is more precision.By two methods,the relation between the fractal dimension Dand Ra of the surface profile machined by turining is investigated .In this case,the fractal dimension D increases with decrease of Ra.a更多还原