Numerical generation of anisotropic 3D non-Gaussian engineering surfaces with specified 3D surface roughness parameters
Numerical generation of anisotropic 3D non-Gaussian engineering surfaces with specified 3D surface roughness parameters
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DOI：
10.1016/j.wear.2010.02.005
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发表时间：
2010-05-12
期刊：
影响因子：
5
通讯作者：
Singaperumal, M.
中科院分区：
文献类型：
--
作者：
Manesh, K. K.;Ramamoorthy, B.;Singaperumal, M.
工程装配配合件的三维表面粗糙度对其功能行为有重要影响。弹流接触承载能力的研究，精密液压组件中间隙流动的三维流体连续体微间隙几何模型分析等，使定量研究某些三维表面粗糙度参数对组件摩擦行为的影响成为可能。为了更好地理解和预测摩擦学问题，需要人工生成具有规定粗糙度的三维工程表面。本文提出了一种具有给定三维表面粗糙度参数的三维各向异性表面的数值生成算法。程序采用非线性共轭梯度法(NCGM)或二维数字滤波法。结果表明，这两种方法都能在较小的关联距离下生成足够的曲面，但在较大的关联距离下，NCGM产生的结果更好。模型模拟输出与工程表面三维表面粗糙度测量结果对比，吻合较好，支持了模型的有效性。(C)2010爱思唯尔B.V.保留所有权利。
Three-dimensional surface roughness of mating parts of engineering assemblies has a significant influence on their functional behaviour. Studies on load bearing capacity in elastohydrodynamic contacts, gap flow analysis in precision hydraulic assemblies using modeled 3D fluid continuum micro gap geometry, etc., have made it possible to quantify the effect of certain 3D surface roughness parameters on frictional behaviour of the assemblies. This set forth the need for artificially generated three-dimensional engineering surfaces having prescribed roughness values for a better understanding and prediction of tribological problems. In this paper, an algorithm is developed for the numerical generation of three-dimensional anisotropic surfaces with prescribed 3D surface roughness parameters. The procedures employ either the Non-linear Conjugate Gradient Method (NCGM) or 2-D Digital Filter method. The results show that both the methods can adequately produce surfaces at small correlation distances, while at higher correlation distances the NCGM yields better results. Comparison between model-simulated output and measurement results of three-dimensional surface roughness of engineering surface show a good match, supporting the validity of the model. (C) 2010 Elsevier B.V. All rights reserved.