计入地面附加衰减的声屏障插入损失估算方法  

A method for estimating the insertion loss of sound barriers including the ground additional attenuation

作　　者：赵剑强[1,2] 赵倩 陈莹[1] 杨文娟[1] 胡博[3] 刘珺[4] 吴沛 ZHAO Jianqiang;ZHAO Qian;CHEN Ying;YANG Wenjuan;HU Bo;LIU Jun;WU Pei(School of Environmental Science and Engineering,Chang’an University,Xi’an 710054,China;Key Laboratory of Subsurface Hydrology and Ecological Effect in Arid Region of Ministry of Education,Xi’an 710054,China;School of Civil Engineering,Chang’an University,Xi’an 710061,China;School of Materials Science and Engineering,Chang’an University,Xi’an 710061,China)

机构地区：[1]长安大学环境科学与工程学院,西安710054 [2]旱区地下水文与生态效应教育部重点实验室,西安710054 [3]长安大学建筑工程学院,西安710061 [4]长安大学材料科学与工程学院,西安710061

出　　处：《应用声学》2018年第4期582-586,共5页Journal of Applied Acoustics

基　　金：国家自然科学基金项目(51778057)

摘　　要：基于理论推导和计算,给出了公路声屏障声学设计中,在考虑地面附加衰减情况下计算插入损失的方法。该方法综合考虑了有限长线声源无限长声屏障绕射声衰减量、有限长线声源地面衰减量及遮蔽角对插入损失的影响。通过与《声屏障声学设计和测量规范》(HJ/T90-2004)的计算结果的对比,验证了该文所给方法的精确性及可行性,并对《声屏障声学设计和测量规范》所给地面衰减修正量进行了商榷。最后,给出了当预测点位于有限长路段中央法线上时,通过计算线声源地面衰减量得到计算插入损失所需参数值,再计算插入损失的简便方法。该研究为存在地面附加衰减情况下有限长声屏障插入损失计算提供了一个新的参考方法。Based on acoustic theory,a new method for estimating the insertion loss of highway sound barriers was proposed in this study.In the method,the ground additional attenuation was considered,and the effects of the diffraction attenuation of a line sound source with a finite length propagated over a sound barrier with an infinite length,the ground attenuation of a sound source with a finite length and the shielding angle on the insertion loss were integrally included.Compared with“Norm on acoustical design and measurement of noise barriers”(HJ/T90-2004),the method proposed in this study was accurate and feasible.Meanwhile,the correction values of ground attenuation recommended by“Norm on acoustical design and measurement of noise barriers”(HJ/T90-2004)were discussed.Eventually,when the receiver located in the central normal of a road with a finite length,a simple and convenient method for estimating the insertion loss was given.The parameter required for calculating the insertion loss was determined by calculating ground attenuation of the line sound source.This research provided a new way for insertion loss calculation in acoustic design of finite length noise barriers when considering the ground attenuation of a sound source.

关 键 词：公路声屏障 插入损失 地面附加衰减 有限长线声源 绕射声衰减量 

分 类 号：X593[环境科学与工程—环境工程]