不同结构地铁车轮的噪声特性测试和对比分析-应用科学学报.PDF

27 6 Vol. 27 No. 6 200911 JOURNAL OF APPLIED SCIENCES — Electronics and Information Engineering Nov. 2009 : 0255-8297(2009)06-0586-06 410083 : . 3 . . . : : TH2; U2 : A Measurement and Comparison of Noise Characteristics of Subway Railcar Wheels with Different Structures TANG Hua-ping, DU Lei, JIANG Yong-zheng, HAO Chang-qian School of Mechanical and Electrical Engineering, Central South University, Changsha 410083, China Abstract: Strict requirements of low-noise produced by subway railcars call for quantitative evaluation of the acoustic characteristics of the wheels. The evaluation method should be easy, practical and persuasive. Measurements are made on noise characteristics of subway railcar wheels with three different structures and excited in different directions. Coefficients of radiation and attenuation are studied. Based on the comparison and analysis, conclusions are reached that wheels with straight radial plate and retarding disc is the best in terms of acoustics. This type of wheels produces low radiation of noise and fast attenuation. This study provides an experimental foundation to the development of low noise urban railcars. Keywords: subway railcar wheel, noise measurement, attenuation coefficient, radiation coefficient -