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Structural intensity assessment on shells via a finite element approximation.

Felipe Pires1, Stéphane Avril2, Steve Vanlanduit3

  • 1Department of Physics, University of Antwerp, Groenenborgerlaan 171, Antwerp 2020, Belgium.

The Journal of the Acoustical Society of America
|February 4, 2019
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Summary
This summary is machine-generated.

This study presents a novel method for assessing structural intensity and vibrational energy transmission in irregular shells. The technique accurately estimates energy flow by interpolating experimental displacement data onto a finite element mesh.

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Area of Science:

  • Structural mechanics
  • Vibrational analysis
  • Acoustics

Background:

  • Assessing structural intensity is crucial for understanding vibrational energy transmission.
  • Current methods for structural intensity assessment are well-established for plates but limited for complex shell structures.
  • Shells require consideration of in-plane displacements and derivatives in a local coordinate system for accurate analysis.

Purpose of the Study:

  • To develop and validate a new experimental method for calculating structural intensity on arbitrary shells.
  • To enable accurate assessment of vibrational energy transmission in complex geometries.
  • To provide a reliable tool for analyzing energy flow in shell structures.

Main Methods:

  • Experimental measurement of global displacements and shell shape.
  • Interpolation of measured data onto a finite element mesh.
  • Application of Kirchhoff plate theory and quadratic shape functions for differentiation.
  • Estimation of strains and structural intensity from processed displacement data.

Main Results:

  • The proposed method successfully estimates strains and structural intensity on irregular shells.
  • Validation through numerical simulation confirms the reliability of the technique.
  • Accurate assessment of vibrational energy transmission based on experimental data is achieved.

Conclusions:

  • The developed method offers a reliable approach for experimental structural intensity assessment on shells.
  • This technique overcomes limitations of previous methods for complex geometries.
  • It provides valuable insights into vibrational energy transmission in shell structures.