| Along with the progress of submarine mute technology and ocean survey, low frequency and high power underwater acoustic transducer is required. The piezoelectric Barrel-stave flextensional transducer is a low frequency sound generator that with compact structure, low-weight, be omnidirectional in the radial direction and is easily to be formed a line array. The piezoelectric Barrel-stave flextensional transducer is researched。In the finite element simulation stage of the Barrel-stave flextensional transducer, firstly the modal distribution of the transducer is analyzed. Then, through harmonic response analysis, the varying relationship between the resonant frequency, the conductance, the transmitting voltage response, the mechanical quality factor Q and the structure parameters are calculated. After that, the varying relationship between the compression capability of the shell and the structure parameters under the constant prestressed and hydrostatic pressure are separately calculated. On the basis of the above analysis, the structural parameters of the prototype transducer are determined, and then the performance of the virtual transducer is simulated and calculated. The result shows, the resonant frequency in water is 1005Hz, the maximum value of the transmitting voltage response curve is 134.6 dB re luPa/m at 1 Volt AC drive, the mechanical quality factor Q is 4, and the virtual prototype transducer is omnidirectional in the radial direction.A new structure barrel-stave flextensional transducer is designed with the finite element software. This new structure is composed of two different curvature shells, as a result of the structure, two different resonant modes are coupled together to expand the frequency band. The calculation results show that -3dB bandwidth of the transmitting voltage response curve can cover 1kHz-2.15 kHz, realize working in a broad frequency band.Finally, according to the simulation results of the Barrel-stave flextensionalprototype transducer is produced, and has been tested. The resonant frequency in water is 900Hz, the maximum value of the transmitting voltage response curve is 132.6dB re luPa/m at 1 Volt AC drive, the mechanical quality factor Q is 3.9, and the prototype transducer is omnidirectional in the radial direction. |
