顶部折壁式声屏障插入损失的预估方法研究

目前工程上常用的计算声屏障插入损失的方法是基于波动理论的近似方法 ,一般主要是验算性质的 ,很难实现声屏障的优化设计。在此采用边界元方法对顶部折壁式声屏障的插入损失进行数值模拟 ,得到不同参数下的声屏障插入损失预估结果。该方法不但可以方便地预估出声屏障的插入损失 ,而且可以根据实际要求对声屏障折壁角的参数进行优化设计 ,为工程应用提供一种有效的设计依据。

ESTIMATION METHOD OF INSERTION LOSS OF INCLINE NOISE BARRIER

The present frequently used mehtods of estimating the noise barrier insertion loss are approximation approaches based on the wave theory.They mainly serve as checking and computing systems and can hardly work in the optimization of noise barrier.A boundary element method (BEM) is used to perform numerical simulation of the insertion loss of incline noise barrier and obtain the estimation results of noise barrier insertion loss under different parameters.This method can not only estimate efficiently the noise barrier insertion loss but also optimize the incline angle parameters in accordance with the actual requirements.It provides an effective design basis for applied engineering.