推力轴承结构形式对水下航行体振动与声辐射特性影响研究

Research on Influence of the Structure Form of Thrust Bearing on Vibration and Sound Radiation of Underwater Vehicle

针对带推力轴承结构的水下航行体,采用有限元与边界元耦合方法,建立水下航行体整艇流固耦合有限元模型以及水中边界元模型,利用ANSYS刚性域功能建立全舱壁式和半舱壁式两种推力轴承结构形式,计算他们所引起的整艇振动与声辐射特性,并且比较分析他们之间的差异。研究表明,全舱壁式推力轴承结构相比半舱壁式推力轴承结构有一定减振降噪效果。

Both fluid structure interaction （FSI） based FEM model and BEM model of underwater vehicle were built up based on the FEM/BEM coupled method. The rigid region function in Ansys was used to model two kinds of thrust bearings, the full bulkhead type and half bulkhead type, by which the vibration and sound radiation caused was calculated, and the difference was compared and analyzed. The research showed that the full bulkhead type has certain effect on vibration and noise reduction compared with the half bulkhead type.