圆管 线圈耦合宽带发射换能器有限元分析

圆管型换能器是水声中常见的一种发射换能器。为拓展工作频带，工程上可通过改进电端，将压电圆管与密绕线圈相串联来激发电路谐振,从而增加带宽，但有限元仿真中压电元件和电磁线圈无法直接耦合在一起。因此,针对圆管 线圈耦合换能器的仿真分析难度较大,该文提出了一种压电 电磁混合有限元仿真方法，通过在压电模型中增加电路接口，利用电磁仿真提取线圈的电感和电阻值，并赋予电路接口中相应元件，使压电元件和电磁线圈耦合在一起，进而实现整体性能仿真分析。仿真与实测结果显示二者物理规律相吻合，验证了所提出仿真方法的有效性。

Finite Element Analysis of Tube Coil Coupling Broadband Transmitting Transducer

The tubular transducer is a common transmitting transducer in underwater acoustics. In order to expand the working frequency band, the circuit resonance can be excited by improving the electrical terminal and connecting the piezoelectric tube and the tightly wound coil in series, so as to increase the bandwidth. However, the piezoelectric element and the electromagnetic coil cannot be directly coupled together in the finite element simulation, so it is difficult to perform the simulation analysis of the transducer. A piezoelectric electromagnetic hybrid finite element simulation method is proposed in this paper. The inductance and resistance values of the coil are extracted by electromagnetic simulation and delivered to the circuit interface which is added to the piezoelectric model, so that the piezoelectric element and the electromagnetic coil are coupled together, thereby the overall performance simulation analysis is realized. The simulations and experimental results show that the physical laws of the two are consistent, which verifies the effectiveness of the proposed simulation method.