摘要
目前公路交通噪声预测结果与实际情况存在较大差别,主要原因是声源预测模型存在不足。为了提高交通噪声预测结果的准确性,通过考虑车辆声源的实际高度,运用声学仿真软件Virtual. lab建立竖向高度与车辆声源实际情况一致的声源模型。对受声点的预测结果分析表明:与等效声源模型相比,考虑声源实际高度的噪声模型更符合道路实际情况,提高预测结果的准确性;在3 m高声屏障下道路交通状况全为重型车时预测结果差值最明显,两种声源模型综合噪声差值为1. 71 d B,315 Hz时达到频谱峰值差值3. 03 d B,为道路交通噪声控制提供参考依据。
At present,the prediction result of highway traffic noise is quite different from the actual situation,the main reason of which is that the prediction model of the sound source is not perfect. The actual height of highway sound source was considered, acoustic simulation software was used to build a sound source model whose vertical height is consistent with the actual situation,the prediction results of sound were analyzed receiving points. It was found that compared with the equivalent simple sound source model, that having considered the sound source height much more accord with the actual highway situation so that the prediction accuracy will be improved; the difference value of the prediction results is the most prominent under 3 m barrier when the road traffic condition are all heavy vehicles and the comprehensive noise difference of the two sound source models is 1.71 dB,it will reach difference value of spectrum peak for 3.03 dB when the frequency is 315 Hz, which will provide reference to the road traffic noise control.
作者
马心坦
常国朋
MA Xin-tan;CHANG Guo-peng(School of Vehicle and Transportation Engineering,Henan University of Science and Technology, Luoyang 471003,China)
出处
《科学技术与工程》
北大核心
2018年第36期175-179,共5页
Science Technology and Engineering
基金
交通流噪声建模与声屏障整体优化研究项目(15A460019)资助
关键词
噪声模型
声源高度
综合噪声
声压级
noise model
sound source height
integrated noise
sound pressure level
