水下弹性复合管状目标特征参数的反演

本文用射线方法、提出将管的反向散射简化为平面波入射到分层媒质反射问题的模型、建立了在高频、远场、薄管条件下,敷吸声材料的弹性管状目标参数的反演公式,分别用计算机模拟和实验得到了目标反射声强谱;重构了充水、充气铝管的内径、外经和吸声橡皮的厚度,理论模型和反演结果得到实验的印证。

Reconstruction of characteristic parameters of underwater compound elastic tubular targets

A geometrical acoustical method is used and put forward a physical model that backscattering of a tube is simplified into reflection of a plane wave on layered media under high frequency,far field,thin tube,to set up reconstruction formulas of the parameters of a metallic tube with sound-absorbing materials covered.The internal and external radii of a aluminium tube and the tubber covered thickness are reconstructed by using simulatied sound fields and experiment.The theoretical results obtained by this method are supported by experiments.