Analysis and design of low frequency and high power flextensional transducer with double-grooves

Abstract Low frequency, high-power and broad bandwidth are always desirable for designing the class IV flextensional transducer (FT). Up to date, there are few literatures on shell’s modification to improve the performance of FT. Only a FT with cutting splits into the shell was reported to broad the bandwidth and decrease resonant frequency, but the free-flooded cavity splits limits the TVR level of FT and the shell size wasn’t optimized. We propose here a new FT structure by cutting double-grooves into the shell to solve this problem. Compared to traditional FT, double-grooves FT possess lower f r , which decreases by 22.2%; has the significantly high BW level, which increases by 21.5% when keep competitive TVR level. After that, the sensitivity analysis is conducted to choose the groove’s variables. The effects of the combination of the groove variables on FT were also discussed to get the reasonable design intervals of groove variables. The results show that the proposed FT with grooves not only possess higher bandwidth and smaller resonant frequency, its high TVR level is also remained. This affords a new way for the FT design and illuminates the immense potential of double-grooves shell in making low frequency, broad bandwidth and high-power FT.