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Abstract
Friction and wear tests of a piston ring against the cylinder of a marine diesel engine were conducted on a pin-on-disc tester. The vibration signals under different wear conditions were studied utilizing the discrete harmonic wavelet packet transform (DHWPT). It was shown that the weak friction-induced vibration signals could be extracted using the DHWPT. When the wear behavior is mild, the friction-induced vibration is linear. When the wear behavior is relatively severe, the friction-induced vibration changes from linear to nonlinear. When the wear behavior is more severe, the friction-induced vibration is nonlinear.
ACKNOWLEDGEMENT
The authors acknowledge support from the Science Foundation for New Scholars of the Ministry of Education of China (200801511018), the Fundamental Research Funds for Central Universities (2009QN018 and 2009JC13), and the Program for New Century Excellent Talents in University (NCET-08-0907).
Review led by Farshid Sadeghi
