基于流固耦合作用的分布反馈式光纤激光水听器
发布时间：2019-05-16 09:20
【摘要】：为了解决流固耦合模态使水听器工作频带变窄的问题,理论分析了流体对双膜片结构的分布反馈式光纤激光水听器固有频率的影响,基于有限元软件对水听器加固封装前后在空气中和流体中的模态和频响性能进行仿真分析,加工制作了水听器原型样品并开展了水声实验研究.实验结果表明,在2 500~8 000Hz的频率范围内,未经加固封装的水听器由于在该频段内存在多个流固耦合固有频率造成响应曲线起伏较大,而采取了加固措施封装后的水听器获得了-142.77±0.8dB的平均声压灵敏度,验证了流体对水听器频响性能的影响以及改善措施的有效性,实验结果与理论及仿真结果吻合较好.
[Abstract]:In order to solve the problem that the working frequency band of hydrophone is narrowed by fluid-solid coupling mode, the influence of fluid on the natural frequency of distributed feedback fiber laser hydrophone with double diaphragm structure is analyzed theoretically. Based on the finite element software, the modal and frequency response performance of hydrophone in air and fluid before and after hydrophone reinforcement and packaging are simulated and analyzed. The prototype sample of hydrophone is fabricated and the underwater acoustic experiment is carried out. The experimental results show that in the frequency range of 2500 鈮，
本文编号：2478181
[Abstract]:In order to solve the problem that the working frequency band of hydrophone is narrowed by fluid-solid coupling mode, the influence of fluid on the natural frequency of distributed feedback fiber laser hydrophone with double diaphragm structure is analyzed theoretically. Based on the finite element software, the modal and frequency response performance of hydrophone in air and fluid before and after hydrophone reinforcement and packaging are simulated and analyzed. The prototype sample of hydrophone is fabricated and the underwater acoustic experiment is carried out. The experimental results show that in the frequency range of 2500 鈮，
本文编号：2478181
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