Influence of Beam Angle of Array Sound Source on Sound Propagation in Typical Shallow Sea Environments

• Published in: 水下无人系统学报 Vol. 33; no. 3; pp. 552 - 558
• Main Authors: Yanyang LU, Qinglang CHEN, Xun LI, Zhaohong WANG
• Format: Journal Article
• Language: Chinese
• Published: Science Press (China) 01.06.2025
• Subjects: active sonar; array source; beam angle of sound source; shallow sea environment
• ISSN: 2096-3920
• DOI: 10.11993/j.issn.2096-3920.2024-0150

With the development of active sonar technology, the beam output capability of active sonar has become the focus of engineering research. It is necessary to study the influence of the sound beam angle on sound propagation for a typical vertical linear array sound source. Based on the theory of normal modes in acoustics, this paper derived the expression of the sound signal for an array sound source and discovered that the sound signal was mainly affected by the following two factors: the beam output of the array sound source at each modal mode and the modal amplitude sampling at the receiving depth. Simulation results show two phenomena: a clear differential distribution structure of the sound signal in the receiving depth and a deviation of the optimal beam angle from 0° as the sound source depth increases. The paper explains the mechanism of the two phenomena based on the derived sound field formula and gives design suggestions for the optimal beam angle under different sonar transmitting and receiving posi