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A Novel Versatile Approach for Underwater Conformal Volumetric Array Design.

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This study introduces a new method for designing conformal volumetric arrays for underwater acoustic imaging, enhancing mine detection capabilities. The validated analytical model simplifies the development of these crucial arrays.

Keywords:
FEAbeamwidthconformal volumetric arrayoptimizationripple

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Area of Science:

  • Acoustics and Signal Processing
  • Underwater Acoustics
  • Array Signal Processing

Background:

  • Underwater acoustic imaging is critical for mine detection.
  • Conformal volumetric arrays offer advantages in beamforming and spatial coverage.
  • Existing designs may lack systematic analytical models for optimization.

Purpose of the Study:

  • To present a novel analytical approach for designing conformal volumetric arrays.
  • To achieve specific beamwidth and transmitting voltage response targets for mine detection.
  • To develop a systematic model for optimizing array design and minimizing ripple.

Main Methods:

  • Derivation of radiated sound pressure based on geometrical parameters.
  • Combination of directional factors to analyze the full array beam profile.
  • Optimization of the design to minimize ripple level.
  • Validation using finite element method (FEM) analysis.

Main Results:

  • The proposed array design meets target half-power beamwidths (85° and 25°) and peak transmitting voltage response (>147 dB).
  • Analytical computations and FEM analysis showed excellent agreement in beam pattern.
  • The developed analytical model is systematic and facilitates design.

Conclusions:

  • A novel, validated analytical model for conformal volumetric arrays has been established.
  • This approach simplifies the design process for underwater acoustic imaging systems.
  • The method is particularly beneficial for advancing underwater mine detection technology.