| Civil Engineering |
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| Influence factors of insertion loss and their noise reduction mechanism for noise barrier |
| HE Bin, XIAO Xin-biao, ZHOU Xin, JIN Xue-song |
| State Key Laboratory of Traction Power, Southwest Jiaotong University, Chengdu 60031, China |
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Abstract
The two-dimension (2D) boundary element method (BEM) was used to develop a noise prediction model for railway noise barrier in order to make clear the noise reduction mechanism and effect of the sound barrier. In-depth discussions about the sound field distribution were conducted when there had barrier or no barrier based on test results. The time history of field points and their frequency characteristics, the characteristic of insertion loss and its linear fitting relationship with speed were discussed. The acoustic field distribution characteristics and noise reduction effect was analyzed. According to the main frequencies of field points, the boundary element method and the outdoor noise simulation model of high-speed railway were used to investigate noise reduction mechanism and effect of some factors, such as absorption coefficient, thickness, height, dip angle and structural style of barrier. The change of sound field distribution, sound pressure and its frequency characteristic were discussed. Results show that the noise reduction effect of nose-barrier and inclination outward 30° is best.
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Published: 25 April 2017
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Cite this article:
HE Bin, XIAO Xin-biao, ZHOU Xin, JIN Xue-song. Influence factors of insertion loss and their noise reduction mechanism for noise barrier. JOURNAL OF ZHEJIANG UNIVERSITY (ENGINEERING SCIENCE), 2017, 51(4): 761-770.
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声屏障插入损失影响因素及降噪机理研究
为了分析高速铁路户外噪声的降噪机理和降噪效果,采用二维边界元法建立高架桥铁路声屏障噪声预测模型,分析不同因素对降噪性能的影响.基于试验结果,对有、无声屏障时的声场分布、场点声压时间历程及频谱特性、插入损失特性及其与速度的线性拟合关系进行探讨,分析声场分布特征和速度对降噪效果的影响.根据场点主要频率,采用边界元法和高速铁路户外噪声仿真模型对吸声系数、声屏障厚度、高度、倾角及面板结构形式等影响因素的降噪机理和降噪效果进行调查分析.分析中,分别考虑以上因素对声场分布、场点声压级及频率特性变化规律的影响.研究结果表明,声屏障采用鼻型结构、外倾30°时的降噪效果最好.
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| ［1］ THOMPSON D J. Railway noise and vibration ［M］. New York: Elsevier, 2009: 18-28．
［2］ 周信,肖新标,何宾,等.高速铁路声屏障降噪效果预测及其验证［J］.机械工程学报,2013, 49 (10): 14-19．
ZHOU Xin, XIAO Xin-biao, HE Bin,et al. Numerical model for predicting the noise reduction of noise barrier of high speed railway and its test validation ［J］. Journal of Mechanical Engineering, 2013, 49 (10): 14-19．
［3］ EKICI I, BOUGDAH H. A review of research on environmental noise barriers ［J］. Building Acoustics, 2003, 10 (4): 289-323．
［4］ CROCKER M J. Handbook of noise and vibration control ［M］. New Jersey: Wiley, 2007: 192-201．
［5］ 何宾.高速列车车外噪声分布特征及车轮阻尼控制措施初步探讨［D］.成都:西南交通大学, 2011．
HE Bin. Primary investigation into exterior noise distribution characteristics of high-speed train and damping control measures of wheel ［D］. Chengdu: Southwest Jiaotong Univesity, 2011．
［6］ MORGAN P A, HOTHERSAL D C, CHANDLER WILDE S N. Influence of shape and absorbing surface: a numerical study of railway noise barriers ［J］. Journal of Sound and Vibration, 1998, 217 (3): 405-417．
［7］ ÖAL-Richtlinie. Calculation of the sound emission from rail traffic (in German) ［R］. Vienna: Federal Department of Transportation, 1990．
［8］ 辜小安.日本新干线铁路噪声现状及控制［J］.铁道劳动安全卫生与环保,2000, 27 (3): 147-152．
GU Xiao-an. Noise control of high speed shinkansen ［J］. Railway Occupational Safety Health and Environmental Protection, 2000, 27 (3): 147-152.
［9］ MURATA K, NAGAKURA K, KITAGAWA T, et al. Noise reduction effect of noise barrier for Shinkansen based on Y-shaped structure ［J］. Quarterly Report of RTR1, 2006, 47(3): 162-168．
［10］ BELINGARD P, POISSON F, BELLAJ S. Experimental study of noise barriers for highspeed trains ［C］∥Proceedings of the 9th International Workshop on Railway Noise. Munich: Springer, 2007: 495-503．
［11］ 尹皓,李耀增,辜小安.高速铁路声屏障降噪效果及其影响因素分析［J］.中国铁路,2009, 12(1): 45-46．
YIN Hao, LI Yao-zeng, GU Xiao-an. Analysis of noise reduction and its influence factors for high-speed railway noise barrier ［J］. Chinese Railway, 2009,12(1): 45-46．
［12］ 马心坦,辛明林,杨绍普. 铁路声屏障与轨边矮墙优化设计研究［J］. 北京交通大学学报, 2006, 30(1): 91-95.
MA Xin-tan, XIN Ming-lin, YANG Shao-pu. Study on optimization design of railway noise barrier and trackside low barrier ［J］. Journal of Beijing Jiaotong University, 2006, 30(1): 91-95．
［13］ 苏卫青,潘晓岩,叶平.高速铁路声屏障声学计算模式研究［J］.中国铁道科学,2013,01: 126-130.
SU Wei-qing, PAN Xiao-yan, YE Ping. The study of acoustic computing model for the noise barrier of highspeed railway ［J］. China Railway Science, 2013, 01: 126-130．
［14］ ISO 3095. Acoustics-railway applications-measurement of noise emitted by railbound vehicles ［S］. Switzerland: IOS, 2013．
［15］ MELLETA C, LETOURNEAU F, POISSONB F, et al. High speed train noise emission: latest investigation of the aerodynamic/rolling noise contribution ［J］. Journal of Sound and Vibration, 2006, 293: 535-546．
［16］ HJ/T 90,声屏障声学设计和测量规范 ［S］.北京:中国环境科学出版社,2004．
［17］ DELANY M E,BAZLEY E N. Acoustical property of fibrous absorbent materials ［J］. Applied Acoustics, 1970, 3(2): 105-116． |
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