The aim of this research project was to investigate the scattering acoustic field by a rigid cavity in a rigid plane insonified by an arbitrary deterministic incident field. The Kobayashi potential method was used in order to derive the scattered acoustic field in a modal form. A previous model was developed using the same method for an incident plane wave (Khanfir et al. in J Sound Vib 361:251, 2016). The incident spherical source was then decomposed into plane waves. The total scattered field was determined by summing all the elementary scattered fields. In this paper, we present a new technique allowing the scattered acoustic field determination without using the decomposition into plane waves technique. This new model was compared to numerical results obtained using the previous model, the boundary element modeling method and experimental results for two rectangular cavities insonified by a spherical source. A good agreement between numerical and experimental results was obtained supporting the validity of the model.

该研究项目的目的是研究由任意确定性入射场声化的刚性平面中的刚性腔体的散射声场。为了导出模态形式的散射声场，使用了小林势法。对于入射平面波，使用相同的方法开发了先前的模型（Khanfir等人，J Sound Vib 361：251，2016）。然后将入射的球形源分解为平面波。通过将所有基本散射场相加来确定总散射场。在本文中，我们提出了一种新技术，无需使用分解为平面波技术即可确定散射声场。将该新模型与使用先前模型获得的数值结果进行了比较，球形声源声波作用的两个矩形腔体的边界元建模方法和实验结果。在数值和实验结果之间取得了良好的一致性，证明了该模型的有效性。