水下强声源的多电极阵列聚束特性

摘要

分析了水下等离子体强声源的冲击波产生特性,利用激波产生时刻与触发开关导通时刻之间时间间隔的一致性,提出了基于激波叠加的多电极阵列聚束的可行方案.建立了水下等离子体强声源的多电极阵列聚束模型,通过仿真计算,得到了不同放电时序下的多电极阵列聚束声场分布特性.仿真结果表明:基于激波的多电极阵列聚束方案可有效进行相干叠加,通过控制多电极阵列的阵元放电时序可灵活改变阵列聚束区域的指向性,有效提高指定区域的聚束波声压级.研究结果对认识水下强声冲击波的叠加规律和优化水下强声源的多电极阵列设计具有指导意义.%The shock wave generation characteristics of underwater plasma intense sound source were analyzed and,based on the superposition of shock waves,a multi-electrode array bunching scheme was proposed using the interval consistency between the shock wave formation and the triggered switch flow.The multi-electrode array bunching sound field model of underwater plasma intense sound source was established,and the array bunching characteristics of different discharging sequences were obtained by numerical simulation.The results show that the multi-electrode array bunching scheme is feasible for coherent superposition.By controlling the discharging sequence of the multi-electrode array,the directivity of the array bunching area can be flexibly changed and the sound pressure level of the specified area can be effectively enhanced.The results provide a theoretical guide for further understanding of the superposition rule of underwater intense sound shock wave and optimum design of the multi-electrode array.