Active Acoustic Bait Simulation System Based on COMSOL

The “receiving and sending” mode is one of the important symbols of the intelligentization of modern active acoustic bait. To solve the distortion of the transmission function of a receiving/transmitting acoustic field and the leakage of the transmitting string under this mode, an active acoustic bait array element domain signal simulation system is established using COMSOL in this study. The system architecture and modular design ideas are described, and six major functional modules are designed: model building, acoustic finite element, marine environment, receiving, transmitting, and signal processing modules. The simulation algorithm of the target/simulated target’s scattering acoustic field transfer function based on the finite-element and plate-element methods is introduced it provides signal processing functions such as spectrum analysis, time–frequency analysis, and envelope extraction. The transfer function between the input voltage of the acoustic bait receiver and the output voltage of the transmitter is simulated by establishing a mathematical model of the acoustic field cross-leak feedback between the transmitter and receiver in the acoustic vibration coupling state. The system is deployed on a cluster computer through a COMSOL server. Unlike existing studies pertaining to “receiving and sending” technology, the effect of the acoustic and vibration coupling of the equipment is considered, and the complete bait operating process using the array time-domain signal as the result is simulated in this study. A specific code is implemented in the background, the interactive interface is simple and easy to operate, and the modules communicate through shared files, which are universal and extensible. After several runs, the system performance stabilizes and the calculation speed is high. By comparing the simulation results and theoretical solutions of the classic spherical electronic cabin model, the accuracy of the system is verified.