【作者】 魏庆朝； 臧传臻； 张雪峰；

【Author】 WEI Qingchao;ZANG Chuanzhen;ZHANG Xuefeng;School of Civil Engineering,Beijing Jiaotong University;

【机构】 北京交通大学土木建筑工程学院；

【摘要】 公路长大隧道内的噪声声压级超过90dB,目前多采用降噪路面或者隧道壁喷涂吸声材料进行被动降噪,而基于声波干涉原理对高速公路隧道内的噪声进行主动降噪是积极的尝试。基于自由场主动降噪声波叠加原理得出考虑发声延迟的噪声源、主动声源与降噪位置之间的空间关系公式,并基于该公式在已知噪声源与降噪位置所在区域的情况下确定主动声源的最佳降噪位置。将该主动降噪设备最佳位置布置规律应用于隧道中,通过有限元仿真分析和现场试验结果的验证,发现其具有很好的适用性。研究成果可为进一步实现高速公路隧道内的主动降噪提供参考。更多还原

【Abstract】 The sound pressure level(SPL) of the noise is more than 90 dB in the long highway tunnels. The noise-reducing pavement or the spraying of the sound absorbing materials on the tunnel wall are the traditional techniques in the highway field. The active noise control methodology is an aspiring attempt to solve the noise control problem in the highway tunnels. This article concluded the formula of spatial relation among the noise,the active sound source and the noise reduction location on the basis of sound wave superposition principle in free field,considering voice delay. In this paper, the best location of active noise control was determined under the condition of the known noise and noise reduction location, based on the formula. The best location law of active noise control is very suitable for tunnel voice field, which was verified by finite element simulation results and field experiment results. The achievement in this paper can be referred for the subsequent implement of the active noise control devices in the highway tunnel.更多还原