基于表面振速分组测量的多舱段结构声辐射预报研究

Acoustic radiation prediction of multi-compartmental structure based on surface vibration grouping measurement

从预报水下结构声辐射的Helmholtz边界积分方程出发,基于壳体上数量有限的振动传感器,提出了壳体表面振速分组测量的声辐射预报方法。专门设计了一个多舱段复杂壳体模型,分别进行了单台设备激励、多台设备激励的壳体振动与声辐射试验。对比分析结果表明,该分组预报方法是准确的、可行的,最后还对表面振动分组的原则进行了讨论。

Based on Helmholtz boundary integral equation for calculating underwater radiation of cylindrical shell, a prediction method of acoustic radiation presented by means of surface vibration velocity grouping measurement accomplished by the vibration accelerometers that installed on the shell surface, A complicated multi-compartmental shell structure is designed and the underwater vibration-acoustic radiation experiments with single and multiple excitations are implemented. It shows that the prediction method is accurate and feasible through comparison between the calculating results and the experimental one. Finally the principle of vibration velocity grouping is discussed.