低车流量下高速公路声屏障插入损失的分析计算  

Analysis and Calculation on Insertion Loss of Highway Noise Barrier in Low Traffic Flows

作　　者：周兆驹[1] 卢伟玲[1] 石红蓉[1] 孙明霞[1] 

机构地区：[1]山东建筑工程学院建筑城规学院,济南250101

出　　处：《噪声与振动控制》2006年第2期72-74,共3页Noise and Vibration Control

摘　　要：在对车流量较低的高速公路声屏障进行声学测量时,发现声屏障的实际降噪效果低于传统理论计算值。分析了车流量对这种偏差影响的原因,提出了等效时间模型和利用无限长线声源、有限长声屏障绕射损失计算公式进行修正的方法。In the acoustic measurements of highway noise barrier in the condition of low traffic flows, the problem that noise reduction of highway noise barrier is lower than the theoretical calculation is found. Analyse the reason of traffic flows effect on the deflection, give the equal time model and the calculative formula of diffraction loss of infinite line sound source and finite noise barrier in low traffic flows.

关 键 词：声学 声屏障 车流量 插入损失 绕射损失 

分 类 号：TU112.594[建筑科学—建筑理论]