舰船尾流中气泡的结构静力分析

Structural Static Analysis of Bubble in Ship Wake

舰船尾流具有独特的声学特性,气泡是产生其声学特性的主要原因。气泡对入射声波的散射/反射作用与谐振频率有关,表现在声波压力作用下气泡的变形和表面位移随声波频率的变化。为分析尾流中气泡的主动声学特性,建立尾流中气泡的主动声特性模型,计算气泡属性材料参数,建立尾流中单气泡的有限元结构模型,分析气泡在结构静力作用下的变形,可得出模型表面节点位移变化与载荷频率之间的关系,为有限元方法在分析舰船尾流中气泡声学特性的可行性提供了依据。

The ship wake has special acoustic characteristic, which is mainly caused by the bubble in it. The scattering and reflection of the sound wave by bubble are related to the resonant frequency of the bubble in the ship wake, which is mainly performed as the sharp and the surface displacement changes as the frequency varies under the sound pressure. In the paper, the active acoustic characteristic model of the bubble in the ship wake was created base on the acoustic property of the bubble under water in order to analyze the active acoustic characteristic of the bubble. The property material parameters were computed, and the finite element structural model of the single bubble in the ship wake was formed and analyzed. The morph and the load distribution of the bubble were gained under the condi- tion of the structural static, and the connection of the displacement of the model surface to the frequency of the load was obtained, which is the strong proof of the feasibility that the finite element analysis can be applied in the research of the acoustic characteristic of the bubble in the ship wake.