Research On ? Type Flextensional Transducer With Carbon Fiber Composite Shell

As a kind of emerging high-intensity and lightweight material,carbon fiber composite material can be applied to the design of low-frequency and high-power underwater acoustic transducer. It can effectively reduce the weight of transducer and its corresponding array and improve the performance of the transducer characters such as frequency, bandwidth and sound radiation.The main work of this paper is about the research of IV type flextensional transducer with carbon fiber composite shell. First, considering the material's constitution and material characteristics, the method to analysis carbon fiber composite materials using finite element software ANSYS was presented. A carbon fiber tube vibration experiment was designed to test the accuracy of software simulation by comparing its result with the actual test data.Afterwards, the vibration mode and equivalent bending stiffness of the carbon fiber composite elliptical shell was analyzed by ANSYS software, the result of which was compared with an Aluminum elliptical shell in the same size so as to discover the performance difference of the two kinds of materials. Vibration frequency of the carbon fiber elliptical shell under the unilateral excitation on the short axis was gained by software simulation, and it was used to analyze the performance of the shell together with actual test data.Finally, two virtual IV type flextensional transducer prototypes of exactly the same size were built in ANSYS with Aluminum and carbon fiber composite materials respectively. The prototypes can be used to simulate the harmonic frequency and sound radiation performance.Both of the two prototypes were manufactured and tested, and the results show that IV type flextensional transducer with a carbon fiber composite shell has the lower working frequency and better sound radiation performance.