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Sound propagation in two-dimensional waveguide with circular wavefront

机译:圆形波前二维波导中的声传播

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摘要

Sound propagation through a waveguide is generally modeled by the Webster horn equation which assumes a planar pressure wavefront. However, most of the sources are non-planar in nature. In this work, a 1-D model is derived for sound propagation through a 2-D waveguide with circular wavefront. The model is derived from the 2-D Helmholtz equation using the weighted residual method. The model assumes a uniform pressure across the angular coordinate at a given radial distance. A 2-D finite element model is used to validate the results for different waveguide geometries and it shows good agreement.
机译:通常通过韦伯斯特霍恩方程对通过波导的声音传播进行建模,该方程假设平面压力波前。但是,大多数来源本质上都是非平面的。在这项工作中,导出了一个1-D模型,用于通过具有圆波前的2-D波导传播声音。该模型是使用加权残差法从二维Helmholtz方程得出的。该模型假定在给定的径向距离处,整个角坐标上的压力均匀。二维有限元模型用于验证不同波导几何形状的结果,并且显示出良好的一致性。

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