Tong Yunzhe, Fan Jun, Wang Bin
Collaborative Innovation Center for Advanced Ship and Deep-Sea Exploration, State Key Laboratory of Ocean Engineering, Shanghai Jiao Tong University, Shanghai 200240, People's Republic of China.
J Acoust Soc Am. 2018 Jun;143(6):3332. doi: 10.1121/1.5040469.
The sound scattering from a fluid-loaded stiffened cylindrical shell at normal incidence is studied by theoretical and experimental approaches. The cylindrical shell is reinforced by an internal longitudinal rigid plate attached to the shell along the axial direction. The backscattered sound is analyzed via the frequency-angle spectra. By studying the generation, propagation, and radiation of the waves, the authors found that the dominant features in the frequency-angle spectra can be explained by the resonance of the shell and the interaction between the scattered and radiation waves. The most significant effect of the internal plate is the radiation of the subsonic a waves caused by the attachments of the internal plate. Furthermore, simple formulas are given to predict the interference fringes in the frequency-angle spectra due to the interference between the specular reflection and the scattering from the shell structure response.
采用理论和实验方法研究了流体加载加筋圆柱壳在垂直入射时的声散射。圆柱壳由沿轴向附着在壳上的内部纵向刚性板加强。通过频率 - 角度谱分析后向散射声。通过研究波的产生、传播和辐射，作者发现频率 - 角度谱中的主要特征可以用壳的共振以及散射波和辐射波之间的相互作用来解释。内部板最显著的影响是由内部板的附着引起的亚声速a波的辐射。此外，给出了简单公式来预测由于镜面反射与壳结构响应散射之间的干涉而在频率 - 角度谱中出现的干涉条纹。
