A Conformal Driving Class IV Flextensional Transducer.

Area of Science:

• Acoustics
• Mechanical Engineering
• Materials Science

Background:

• Class IV Flextensional Transducers (FTs) are widely used as high-power, low-frequency underwater acoustic sources.
• Conventional designs face limitations due to longitudinal driver stacks increasing resonance frequency.
• There is a need for improved FT designs offering lower operating frequencies and smaller form factors.

Purpose of the Study:

• To propose and investigate a novel conformal driving Class IV FT design.
• To address the limitations of conventional FTs by reducing operating frequencies.
• To demonstrate the feasibility of a low-frequency, small-size acoustic source.

Main Methods:

• Finite Element (FE) simulations were employed for geometric parameter analysis and design optimization.
• A conformal driving Class IV FT was designed with driver stacks integrated into the oval shell geometry.
• The optimized transducer was fabricated and experimentally tested in an anechoic tank.

Main Results:

• The conformal driving Class IV FT achieved a resonance frequency of 510 Hz, approximately 45% lower than conventional designs.
• The proposed design exhibits competitive Transmitting Voltage Responses (TVRs).
• FE predictions showed good agreement with experimental results, validating the design's performance.

Conclusions:

• The conformal driving Class IV FT design successfully overcomes the limitations of conventional designs.
• This novel transducer offers a promising solution for low-frequency, high-power underwater acoustic applications.
• The study demonstrates effective low-frequency and small-size acoustic performance through optimized design and experimental validation.