摘要
建立了大功率电磁式脉冲换能器的时变振动数学模型,利用有限差分方法得到了该模型的数值解。分析了声源的电磁参数和物理结构对辐射声压大小的影响,确定了最优的参数。设计和制作了电磁式脉冲声源,进行了性能测试。结果表明,电容充电6 kV情况下距离换能器1 m处峰值声压226 dB,中心频率25 kHz,与模型结果(峰值声压225 dB,中心频率24.5 kHz)吻合较好。进而证明了本文提出的时变振动模型可以为设计和优化大功率电磁式脉冲声源提供理论指导。
A time-varying model in the electromagnetic pulse source with high intensity is established and its numerical solution is obtained by using the finite difference method. Based on the simulation results, the optimized structural parameters are obtained and a prototype of the new underwater electromagnetic pulse source with high intensity is designed and tested. The measured peak sound pressure level （SPL） at the point of 1 m away from the transducer surface is 226 dB with the center frequency 25 kHz in experiments, and agrees well with that in the model simulation, which has a peak SPL of 225 dB and a center frequency of 24.5 kHz. Therefore, the time-varying model proposed in this study can provide theoretical references for designing and optimizing the electromagnetic pulse source
出处
《声学学报》
EI
CSCD
北大核心
2015年第2期254-262,共9页
Acta Acustica
