Experimental Study on Reduction of Curve Squeal Noise on Mountain Tram Wheels on Sharp Curves Using Lubricant

초록

Curve squeal noise is an intense tonal noise that occurs when a train goes through a narrow curve and is generated by the wheel contacting the rail. The squealing noise is an issue in mountain tram development projects. In this study, 1:7.5 scaled equipment is proposed to produce the squealing noise based on rolling speed, rolling direction, angle of attack, and preload ratio. Solid-stick lubricant is used as a mitigation method. The similarity law is applied and a finite element analysis code is used to compare the natural frequency of full-scale and small-scale results. The results show that the scaled equipment can generate squealing noise and that rolling backward direction has a higher possibility of generating squealing noise. Moreover, the frequency similarity approach is verified, and the solid stick lubricant is found to successfully mitigate the squealing noise even at high rolling speed and angle of attack.

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