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Noise and Vibration Analysis for Drive System of a Traction Motor
LI Shuai;LIU Yan;YANG Bing;JIANG Chang-ying;ZHONG Zhi-fang
   2011, 31 (3): 149-152.   DOI: 10.3969/j.issn.1006-1355-2011.03.035
Abstract （3262）            Save
Using noise and vibration analysis system, the transmission system noise and vibration of a traction motor were tested, and the characteristics of the noise and vibration were analyzed. It is concluded that the noise level increases with the rotation speed increasing mainly in the frequency range near 800 Hz, and noise of MIC02 is higher than the noise of MIC01; gearbox vibration is bigger than motor vibration. This work provides a reference for noise and vibration reduction design of transmission systems of traction motors.
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《Characteristics of Noise in Subway Cars》
ZHANG Xiao-pai;LIU Yan;ZHONG Zhi-fang
   2010, 30 (2): 69-71.   DOI: 10.3969/j.issn.1006-1355.2010.02.069
Abstract （2521）      PDF（pc） （988KB）（1972）       Save
The noise experiments in a subway car were made. The measurement points were positioned at the centre of the cars body, and at the vestibule diaphragm and the bogie, respectively, above the floor with different heights. It is found that the noise at the airoutlet is 77.8 dB(A) in the case of static car. When the train was running, however, the noise of the subway car is 1.0-5.9 dB(A)　higher in the subway tunnel than that in the railway viaduct. Wheel/rail noise is the major contributor to the internal noise, while the noise from auxiliary equipments can usually be neglected in the measurement except the portions near the airoutlet in the running car. The coach airproof affects the noise distribution in the car, so the airproof of the door and the vestibule diaphragm should be improved.
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