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Resonant response of complex shell structures

Photiadis1, Houston, Williams

  • 1Naval Research Laboratory, Washington, DC 20375-5000, USA. doug@genah.nrl.navy.mil

The Journal of the Acoustical Society of America
|September 29, 2000
PubMed
Summary
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Structural resonances significantly impact submerged shell acoustics, influencing radiated noise and scattering. Increased complexity introduces localized resonances and non-axisymmetry, crucial for designing quieter systems.

Area of Science:

  • Acoustics and Structural Mechanics
  • Vibrational Analysis of Shell Structures

Background:

  • Shell structure resonances are critical for acoustic characteristics like radiated noise and scattering.
  • Understanding these resonances guides the development of low-noise platforms.

Purpose of the Study:

  • To investigate the effects of increased complexity on submerged shell structure resonances.
  • To analyze flexural Bloch mode resonances, localized resonances, and non-axisymmetry impacts.

Main Methods:

  • Scale model investigation of submerged shell structures.
  • Analysis of structural complexity effects on resonance phenomena.

Main Results:

  • Identified flexural Bloch mode resonances.

Related Experiment Videos

  • Observed localized resonances due to structural irregularity.
  • Assessed the influence of non-axisymmetry on resonance characteristics.

    • Conclusions:

    • Structural complexity significantly alters shell resonances.
    • Findings provide insights for acoustic design and system development to mitigate noise and scattering.