Influences of soft prolate spheroid baffle on Directivity of Acoustic Vector Sensor

摘要：

The directivity of vector sensors installed in the sonar dome of underwater vehicles will be distorted by vector sensors’ baffle. This paper selects the soft prolate spheroid as the baffle model. The prolate spheroid baffle is meshed by finite element software, then the mesh is imported into the boundary element software and the directivity of pressure and vibration velocity of diffraction acoustic field are calculated at different frequencies. The results show that under the condition of soft baffle, the pressure is zero on the boundary of the baffle, the phase of diffraction wave and incident wave is reversed and the amplitude of the diffraction wave is equal to the amplitude of incident wave. The symmetry of the directivity of pressure is better in low frequency, but because of the reversed-phase superposition of the diffraction wave and the incident wave, the amplitude of pressure is relatively small. As the frequency increasing, the directivity of pressure is seriously distorted. Because the acoustic energy of diffraction wave mainly concentrates in the radial direction, the radial velocity is seriously distorted by the diffraction wave, on the contrary, horizontal velocity is less distorted.

关键词： vector sensor prolate spheroid boundary element method (BEM)

作者: Ji Jianfei Liang Guolong Liu Kai Li Yang

作者单位: College of Underwater Acoustic Engineering Harbin Engineering University Harbin,Heilongjiang Province,China

会议类型: 国际会议

会议名称: 2010 IEEE信息与自动化国际会议(ICIA 2010)

会议地点: 哈尔滨

会议语种:英文

页码: 1-5

在线出版日期: 2010-06-20（万方平台首次上网日期，不代表论文的发表时间）