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代写硕士毕业论文 > 机械论文 > 基于蒙特卡罗方法的随机粗糙表面仿真

基于蒙特卡罗方法的随机粗糙表面仿真

作者:2017-03-31 23:02阅读:文章来源:论文代写
  摘要: 利用隨机粗糙面的相关函数及其表面谱密度函数,结合蒙特卡罗方法建立随机粗糙表面模型,并对粗糙表面统计参数均方根高度和相关长度与表面高度的关系进行特性分析。通过仿真可知:高度均方根和相关长度的变化对表面高度有很大影响,当均方根高度不同,相关长度相同时,表面高度随均方根增大而增大;当均方根高度相同时,相关长度越大,周期变小;通过改变某一方向上的相关长度,只改变本方向上的周期,而对其他方向不产生影响。 
  Abstract: Correlation function and surface spectral density function of random rough surface are combined with Monte Carlo method to establish the random rough surface model, and the relationship of RMS height and correlation length of the surface is studied. The simulation shows that: the change of correlation length and the RMS height have great effect on the surface height, when the correlation length is the same, the surface height increases with RMS height; when the RMS height is the same, the correlation length is larger but the cycle is smaller; through changing the correlation length in one direction, only change the direction of the cycle, but has no effect on the other direction. 
  关键词: 激光雷达;蒙特卡罗;随机粗糙表面 
  Key words: lidar;Monte Carlo;random rough surface 
  中图分类号:O348.11 文献标识码:A 文章编号:1006-4311(2017)08-0226-03 
  3 结语 
  本文通过随机粗糙面的相关函数和表面谱密度函数,引用经典的随机粗糙面产生方法,结合蒙特卡罗方法实现随机粗糙面模拟,通过对不同参数的设置,分析了各参数对随机粗糙面的起伏高度的影响。 
  改变某一方向的相关长度,随机粗糙面仅对该方向上的表面起伏产生影响,对其它方向没有影响;改变其均方根高度,该随机粗糙面的起伏高度产生影响;而同时改变随机粗糙面的相关长度和均方根高度,其效果与前一致,且不相互影响;生成随机粗糙面的次数越多所产生的粗糙面起伏越小。 
  随机粗糙表面的蒙特卡罗模拟及其参数分析将为随机粗糙面散射的数值计算奠定基础。 
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