ISSN   1004-0595

CN  62-1224/O4

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滤波截止频率对粗糙点接触机理影响研究

Study on Effect of Filter Cut-off Frequency on Rough Point Contact Mechanism

  • 摘要: 使用基于决速傅里叶变换和共扼梯度法的接触程序,分析了滤波截止频率对粗糙点接触机理的影响计算结果表明:粗糙表面形貌数据再处理时使用的滤波器滤波截止频率,对力-接近量关系有着明显的影响;滤波截止频率越小,接触面积越大,接触压力越小;滤波截止频率的改变会导致Von Mises?应力的显著改变,这种改变在接触面上特别明显因此,在实际研究粗糙表面的接触机理时,选择合适的滤波截止频率是非常必要的

     

    Abstract: Influences of filter cut-off frequency , by which fine rough surface characteristics can be further achieved after obtaining rough surface roughness , on contact mechanism for rough point contact were investigated with authors contact program based on FFT technology and conjugate gradient method Numerical results show that the cut-off frequency used for has a significant effect on curve of applied force against approach between the two contacting bodies The smaller cut-off frequency , the larger contact area and the smaller contact pressure It 15 also found that the cut-off frequency can change magnitude and distribution of Von Mises stress in contacting bodies , especially those in contacting surface Therefore , it is necessary to reasonably chose cut-off frequency so as to correctly evaluate the point contact mechanism

     

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