中文摘要：

水下目标声散射回波的时域和频域特征在不同声波入射角度下存在差异。通过计算水下典型目标声散射场，建立全方位入射角下目标回波的动态模型，确定目标散射特征中的重要几何构成，并应用WVD-Hough变换提取目标几何亮点。仿真试验结果表明，建立的目标全方位动态模型与理论相符，提出的方法可有效提取目标回波几何亮点，为进一步研究不同入射角下目标识别提供参考模型。

英文摘要：

The time and the frequency features of underwater target acoustic scattering echoes aredifferent at different incident angles.By computing the acoustic scattering of canonical underwatertarget,an omni-directional dynamic model for target echoes is established,the significant geometricalcomponents of the target scattering features are defined,the target geometric highlightis extracted by the WVD-Hough transform method.The simulation and experimental resultsshow that the target omni-directional dynamic model is in agreement with the theory,the methodcan effectively extract the target echoe geometric highlight,thus it can provide a reference modelfor target recognition at unknown incident angle.