作　　者： ; ;

机构地区： 浙江大学建筑工程学院建筑学系

出　　处： 《浙江大学学报（工学版）》 2002年第6期664-667,共4页

摘　　要： 有限元素法(finiteelementmethod,FEM)是基于声波动方程求解室内声场的数值计算方法,可用于分析复杂形状房间内声场的低频特性.明确地给出了刚性边界条件下房间内两点之间声传输函数和声脉冲响应函数的有限元素法计算模型,并以矩形房间为例详细讨论了有关细节.所讨论的计算模型可以真实地反映房间内不同声源点、接收点位置上的声压频谱特性和脉冲响应时间结构,如直达声、反射声等.该方法可用于研究声波在室内的传播规律及预测房间的低频声学特性,在指导厅堂音质设计和噪声控制的实践中具有广泛的应用前景. A finite element method is presented for studying the acoustic transmission function and acoustic impulse response of irregular rooms with rigid boundaries. It was shown that the computer model successfully predicted the effects of the different source-receiver locations on the amplitude-frequency spectrum. Also the model solution method can capture the effects of direct sound and the reflections. The finite element method is a digital computation method based on wave equation. It is a useful tool in the analysis of low-frequency room acoustic phenomenon where the true wave nature of sound must be accurately modeled. As an example, a full three-dimensional rectangular room is modeled.

关 键 词： 声传输函数 声脉冲响应函数 有限元素法 数值计算 声波动方程 室内声传播

领　　域： [建筑科学]