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CHEN Guang-xiong, HU Wen-ping, WANG Ping, ZHU Min-hao. Fractal description method of corrugation for friction surface[J]. Journal of Traffic and Transportation Engineering, 2015, 15(1): 25-33. doi: 10.19818/j.cnki.1671-1637.2015.01.004
Citation: CHEN Guang-xiong, HU Wen-ping, WANG Ping, ZHU Min-hao. Fractal description method of corrugation for friction surface[J]. Journal of Traffic and Transportation Engineering, 2015, 15(1): 25-33. doi: 10.19818/j.cnki.1671-1637.2015.01.004
shu

Fractal description method of corrugation for friction surface

doi: 10.19818/j.cnki.1671-1637.2015.01.004
  • 1.

    State Key Laboratory of Traction Power, Southwest Jiaotong University

  • 2.

    School of Mechanical Engineering, Jingchu University of Technology

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  • Author Bio:

    CHEN Guang-xiong (1962-), male, professor, PhD, +86-28-87603724, chen_guangx@163.com

  • Received Date: 2014-10-08
  • Publish Date: 2015-02-25
    Abstract
  • On the self-built pin-on-disc test machine, the sliding friction test under self-excited vibration was carried out. The average contact stress between wheel and track was simulated by using the friction movement of pin-on-disc. The corrugation sizes of friction surface for disc specimen were measured with laser displacement sensor, the corrugation curves of friction surface for disc specimen under different test conditions were obtained. The fractal description method of corrugation for friction surface was carried out with power spectrum method, the fractal dimensions of corrugation under different test conditions were calculated based on the relationship between power spectrum index and fractal dimension, and the relationships between fractional dimension and other parameters such as rotating speed, normal load and revolution were analyzed. Test result shows that under the same normal load, the fractal dimension calculated by using power spectrum method increases with the increase of rotating speed. Under the same rotating speed, the fractal dimension increases with the increase of normal load. Under the same rotating speed and normal load, the fractal dimension decreases with the increase of revolution. The fractional dimension of corrugation of friction surface for disc specimen is from 1.79 to 1.92, the corrugation of friction surface for disc specimen have obvious fractal characteristics. The larger the fractal dimension is, the more serious the corrugation of friction surface for disc specimen is, and the longer the wave length of corrugation is.The result calculated by using power spectrum method is consistent with the experimental result, so fractal dimension can be used to quantitatively describe the corrugation of friction surface.

     

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