天津大学学报（英文版）
天津大學學報（英文版）
천진대학학보（영문판）
TRANSACTIONS OF TIANJIN UNIVERSITY
2015年
3期
216-222
,共7页
numerical simulation%Gaussian rough surface%autocorrelation function%root-mean-square height%IDFT
A numerical simulation method based on inverse discrete Fourier transform(IDFT)is presented for gener-ating Gaussian rough surface with a desired autocorrelation function(ACF). The probability density function of the height distribution of the generated Gaussian surface and the root-mean-square height of the rough surface are also considered. It is found that the height distribution of the generated surface follows the Gaussian distribution, the devia-tion of the root-mean-square height of the modeled rough surface from the desired value is smaller than that of Patir’s method, and the autocorrelation function of the modeled surface is also in good agreement with the desired autocorre-lation function. Compared with Patir’s method, the modeled surface generated by the IDFT method is in better agree-ment with the desired autocorrelation function, especially when the correlation length is relatively large.
