Modelling sound radiation from a baffled vibrating plate for different boundary conditions using an elementary source technique
Modelling sound radiation from a baffled vibrating plate for different boundary conditions using an elementary source technique
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使用基本源技术对不同边界条件下挡板振动板的声辐射进行建模
DOI：
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发表时间：
2014
期刊：
影响因子：
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通讯作者：
M. Nuawi
中科院分区：
文献类型：
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作者：
A. Putra;N. Shyafina;David J. Thompson;N. Muhammad;M. Nor;M. Nuawi
矩形板声辐射的解析模型，为了数学上的方便，通常是基于简支边。其他边界条件的模型也存在，但大多数采用相当复杂的分析计算。本文提出了一个用离散元源模型计算折流板辐射效率的解析模型。该模型只需要知道板的振动速度的空间分布，因此可以方便地计算该表面速度，通过建立不同的板边界条件的迁移率方程。然后将其包含在离散化的瑞利积分中，以计算远场的辐射声压。本文给出了几种边界条件组合下不同强迫位置辐射效率的变化规律及其平均值。实验结果显示与预测结果合理的协议，自由和固定的边缘。
ABSTRACT Analytical models of the sound radiation a rectangular plate are often based on simply supported edges for mathematical convenience. Models for other boundary conditions also exist, but mostly these employ rather complicated analytical calculations. This paper presents an analytical model of the radiation efficiency for a baffled plate using a discrete elementary source model. The model requires only the a knowledge of the spatial distribution vibration velocity of the panel and hence this surface velocity can be calculated conveniently by using the established mobility equations for different plate boundary conditions. This is then included in the discretized Rayleigh integral to calculate the radiated sound pressure to the far-field. Variability of the radiation efficiency for different forcing locations and its average value are presented here for several combinations of boundary conditions. Experimental results are presented for free and clamped edges which show reasonable agreement with the predicted results.