高速铁路主动降噪声屏障次级声源位置研究
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摘要
采用主动降噪技术提高传统直立式高速铁路声屏障对中低频段噪声的降噪效果,需要研究主动降噪系统中次级声源的合理位置。根据波动声学的声绕射理论,结合对不同高度声源的声绕射仿真结果,确定绕射声的"虚拟声源"范围,并将次级声源设置在该范围内开展主动降噪仿真分析。结果表明,在频率低于800 Hz时,次级声源对声影区的较大范围内可以取得明显的降噪效果。
To improve the noise reduction effect of traditional vertical high-speed railway noise barrier in the low and medium frequency band by use of active noise cancellation technology, the optimal position of the secondary sound source in the active noise cancellation system should be studied. Based on the diffraction theory of wave acoustics and the barrier's diffraction simulation results of sound sources at different heights, the range of "virtual sound source" of diffraction sound wave was determined. Then the barrier's active noise cancellation simulation analysis was carried out by setting the secondary sound source in the range. The results revealed that when the frequencies were below 800 Hz, the secondary sound source brought significant noise reduction in the most range of the acoustic shadow area.
To improve the noise reduction effect of traditional vertical high-speed railway noise barrier in the low and medium frequency band by use of active noise cancellation technology, the optimal position of the secondary sound source in the active noise cancellation system should be studied. Based on the diffraction theory of wave acoustics and the barrier's diffraction simulation results of sound sources at different heights, the range of "virtual sound source" of diffraction sound wave was determined. Then the barrier's active noise cancellation simulation analysis was carried out by setting the secondary sound source in the range. The results revealed that when the frequencies were below 800 Hz, the secondary sound source brought significant noise reduction in the most range of the acoustic shadow area.
引文
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[2]张晓宇,仪垂杰.主、被动噪声控制的实验研究[J].噪声与振动控制,2011,31(3):145-148.
[3]田静,李晓东,徐健,等.有源护耳器的应用研究及商品化进程[J].电声技术,2000(3):24-26.
[4]余成,赖树明,任斌,等.反馈式主动消噪耳机的研制[J].东莞理工学院学报,2005,12(3):71-76.
[5]戴建营,刘晓玲,师春燕.主动噪声控制汽车消声器研究[J].西华大学学报(自然科学版),2006,25(6):18-19.
[6]赛吉尔呼,戴盛芳,董爱华,等.基于SVM和RBFN的汽车主动降噪系统传感器故障诊断[J].传感器技术学报,2014,27(4):512-517.
[7]陈道炯,马瑞,单世宝,等.车内多通道自适应主动降噪的研究[J].汽车工程,2007,29(4):300-303.
[8]余文斌,吴哲.基于飞行保护头盔的主动消声研究[J].航天医学与医学工程,2005,18(4):306-307.
[9]江启红.电力变压器有源降噪的关键技术研究[J].低碳世界,2016(17):49-50.
[10]袁园.干涉消声技术在变电站噪声控制中的应用研究[J].陕西电力,2015,43(12):80-83.
[11]伊善贞,费仁元,周大森,等.次级声源安装角度对管道有源消声性能的影响研究[J].机械工程学报,2005(4):63-68.
[12]朱亚伟.控制排气管道低频噪声的半主动消声装置研究[D].太原:中北大学,2016.
[13] ShengH,Shao YC.Researchonthe Applicationof Active Sound Barriers for the Transformer Noise Abatement[C]//2016 International Conference on Electronic, Information and Computer Engineering. Beijing:EDP Sciences,2016:1-4.
[14] Hart C R,Siu-Kit Lau. Active Noise Barrier Minimizing PressureGradient[J].Journalofthe AcousticalSocietyof America,2010,128(4):2286.
[15]牛锋,邹海山,邱小军,等.有源声屏障中误差传感器的位置优化[J].声学学报(中文版),2007,32(1):34-41.
[16]邹海山,邱小军,牛锋,等.虚拟声屏障的数值及实验分析[J].声学学报(中文版),2007,32(1):26-33.
[17]时有明,孙艳琳.菲涅耳-基尔霍夫积分与半波带法分析衍射光谱[J].光谱实验室,2013,30(6):2806-2809.
[18]赵俊卿,郑磊,魏卫刚,等.基于Fresnel-Kirchhoff理论的无限大声屏障绕射声衰减[J].噪声与振动控制,2007(6):100-103.