Numerical Study on the Acoustic Characteristics of Double Cylinders Using FEM/BEM

摘要：

Numerical prediction of sound radiated from submersibles hull is carried out. Vibration and noise characteristics of different types of connections between the inner and the outer shell of a double hull cylinder are investigated. A new way of using a damping material to reduce the noise and vibration of submersibles hull is put forward in order to use least amount of damping material and still obtaining desired results and thus making its use more cost effective. Finite element method (FEM) is employed to calculate vibration responses in consideration of fluid-structure interaction. The vibration displacements are treated as the velocity boundary condition of boundary element method (BEM) to calculate underwater radiated noise. A comparison of acoustics characteristics is carried out between the damped and undamped submersible hull. Rib connections proved to be having better noise and vibration characteristics at medium and higher frequencies and the introduction of damping material has reduced the acoustic characteristics of submersible hull at higher frequencies.

关键词： FEM/BEM acoustic characteristic damping material cylinder

作者: De-jin Qian Xue-ren Wang Xu-hong Miao Di Jia

作者单位: Naval Academy of Armament, Beijing, China, 100161

会议类型: 国际会议

会议名称: The Third International Conference on Modelling and Simulation(第三届国际建模、计算、仿真、优化及其应用学术会议 ICMS 2010)

会议地点: 无锡

会议语种:英文

页码: 198-202

在线出版日期: 2010-06-04（万方平台首次上网日期，不代表论文的发表时间）