边界元法在环境声学中的应用

边界元法是边界积分方程的数值解法 ,是随着计算机技术的发展而出现的。建立声学边界积分方程分两种方法 :直接法与间接法。本文介绍了边界元法在环境声学中的应用 ,如声屏障和不同情况下道路周围的声场分布、复杂气象条件对声传播的影响的问题等。由于边界元法是半解析半数值解法。在解边界积分方程时会遇到解的存在与唯一性问题。

The Application of Boundary Element Methods in Environmental Acoustics

The boundary element method is to be used to get the numerical solution of the boundary integral equations.It appears with the development of computer technology.There are two methods to establish the acoustical boundary integral equations:the direct and the indirect method.In this paper,the application of boundary element method in environmental acoustics is reviewed,for example,how the sound pressure levels distribute around the barriers and the roads,and how the meteorological conditions influence the outdoor sound propagation.Because the boundary element method is half analytical and half numerical,there exist the problems of the existence and uniqueness of the solutions.