噪声与振动控制Issue(3)：24-28,5.DOI:10.3969/j.issn.1006-1335.2015.03.006
约束型阻尼钢轨衰减率和降噪效果试验分析
Laboratory Measurement of Damped Rail Decay Rates and Analysis of Noise Reduction
摘要
Abstract
Hammering method was used to test the decay rates of damped rails and a standard rail in a laboratory. Their test results and sound spectra were compared and analyzed. The results show that the decay rates of the damped rails in low frequency range are close to that of the standard rail, but they are much higher than that of the standard rail in high frequency range. The decay rate of the damped rail No.1 at 2 500 Hz, No.2 at 1 600 Hz and No.3 at 1 000 Hz are respectively 0.5 dB/m, 0.28 dB/m and 0.21 dB/m higher than that of the standard rail. So, results of the analysis show that the damped rails can reduce the rail noise by 1.3 dB(A)-1.5 dB(A), and reduce the whole track noise by 1.6 dB(A)-1.7 dB(A).关键词
振动与波/轮轨噪声/阻尼钢轨/衰减率/频率响应Key words
vibration and wave/wheel-rail noise/damped rail/decay rate/frequency response分类
通用工业技术引用本文复制引用
刘晓龙,周信,刘玉霞,庄继忠,肖新标..约束型阻尼钢轨衰减率和降噪效果试验分析[J].噪声与振动控制,2015,(3):24-28,5.基金项目
国家自然科学基金(U1434201)；教育部创新团队(IRT1178)；教育部博士点基金(20130184110005) （U1434201）
