XU Shujuan,ZHANG Xin.Study on the Generation of the Non-Gaussian Rough Surfaces based on the NCGM and FFT[J].Journal of Chengdu University of Information Technology,2025,40(03):326-328.[doi:10.16836/j.cnki.jcuit.2025.03.012]
基于FFT和NCGM的非高斯型粗糙表面构建方法研究
- Title:
- Study on the Generation of the Non-Gaussian Rough Surfaces based on the NCGM and FFT
- 文章编号:
- 2096-1618(2025)03-0326-03
- Keywords:
- wheel-rail; non-Gaussian; rough surface; ACF
- 分类号:
- TP273
- 文献标志码:
- A
- 摘要:
- 机车轮轨接触表面的粗糙度对轮轨接触力学行为及界面应力场分布具有重要影响。在制造及实际服役过程中,轮轨表面微凸体高度呈现非高斯型分布特性且具有任意方向性。基于自相关函数法,构建非高斯型分布粗糙表面,并采用非线性共轭梯度法和快速傅立叶变换提升求解效率。此外,还探讨了不同自相关长度对粗糙表面特性及求解时间的影响规律。
- Abstract:
- The roughness of the locomotive wheel-rail contact surface significantly affects the contact mechanics behavior and the distribution of interfacial stress fields. During manufacturing and in-service operations, the asperity height distribution on wheel-rail surfaces exhibits non-Gaussian characteristics with arbitrary correlations. In this work, a non-Gaussian rough surface was constructed based on the autocorrelation function method(ACF). To improve computational efficiency, the nonlinear conjugate gradient method and fast Fourier transform were employed. To improve computational efficiency, the non-linear Conjugate Gradient Method(NCGM)and the Fast Fourier Transform(FFT)were employed. Furthermore, the influence of different autocorrelation lengths on rough surface characteristics and computation time was investigated.
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备注/Memo
收稿日期:2025-03-07