Structural Optimization and Performance of a Low-Frequency Double-Shell Type-IV Flexural Hydroacoustic Transducer

Area of Science:

• Acoustics
• Mechanical Engineering
• Materials Science

Background:

• Hydroacoustic transducers are crucial for underwater acoustic applications.
• Enhancing displacement amplification is key to improving transducer efficiency.
• Existing designs may have limitations in bandwidth and response.

Purpose of the Study:

• To propose and analyze a double-shell type-IV curved hydroacoustic transducer for amplified displacement.
• To achieve broadband emission capabilities for the hydroacoustic transducer.
• To optimize transducer design for enhanced performance metrics.

Main Methods:

• Utilized Ansys finite element simulation to study vibration modes and harmonic response in air and water.
• Employed component size optimization to achieve desired resonant frequency and response.
• Manufactured a prototype based on optimized parameters for physical testing.

Main Results:

• Simulation achieved a resonant frequency of 740 Hz, maximum conductivity of 0.66 mS, and transmitting voltage response of 130 dB.
• Physical testing of the prototype yielded a resonant frequency of 750 Hz and a transmitting voltage response of 129.25 dB.
• The prototype's performance closely matched simulation results, validating the design.

Conclusions:

• The double-shell type-IV curved hydroacoustic transducer design effectively amplifies displacement.
• Optimization of component sizes led to successful broadband emission and high transmitting voltage response.
• The validated design meets performance requirements for advanced hydroacoustic applications.