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14 results on '"Zhong, Zhifang"'

5. Study on characteristics of noise of diesel locomotive

Author

Hao Yingnan, Liu Yan, Zhang Xiaopai, and Zhong Zhifang

Subjects
Engineering (General). Civil engineering (General), TA1-2040
Abstract

Noise test has been done for a certain type of diesel locomotive under different working conditions for outfield and cab, and analyzed the noise characteristic of each test point. Through the analysis of the data :The sound pressure level of point D, E, I, J of 12 test points of outfield test is bigger due to the effect of noise source; The changing of working condition of locomotive mainly makes test points of the outfield produce big change in the high frequency after 400 Hz; The opening of cooling fan makes sound pressure level of test points of outfield improved obviously; The noise of cab is mainly produced by combined action of vibration of locomotive wall and external noise source: External noise source influences the whole frequency band of the cab, vibration makes individual frequency have big increased.

Published
2015
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8. Noise Test and Analysis of City Road Traffic

Author

Liu Yan, Zhong Zhifang, Yang Bing, Liu Xiao, and Zhang Xiaojuan

Subjects
Noise, General Energy, Health (social science), General Computer Science, Computer science, General Mathematics, Acoustics, General Engineering, Road traffic, General Environmental Science, Education, Test (assessment)
Published
2013

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