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A Design Approach for Improving the Vibroacoustic Characteristics of Plate Structures

[+] Author Affiliations
Nabeel T. Alshabatat

Tafila Technical University, Tafila, Jordan

Koorosh Naghshineh

Western Michigan University, Kalamazoo, MI

Paper No. IMECE2011-62392, pp. 673-682; 10 pages
doi:10.1115/IMECE2011-62392
From:
  • ASME 2011 International Mechanical Engineering Congress and Exposition
  • Volume 8: Mechanics of Solids, Structures and Fluids; Vibration, Acoustics and Wave Propagation
  • Denver, Colorado, USA, November 11–17, 2011
  • Conference Sponsors: ASME
  • ISBN: 978-0-7918-5494-5
  • Copyright © 2011 by ASME

abstract

This paper presents a design method to optimize the natural frequencies and to minimize the radiated sound power from vibrating plate-like structures. The design method involves creating dimples on the surface of the structure. The dimple can be defined as a local modification in the surface of a structure which has a spherical shape. Creating dimples does not change structural mass but affects its stiffness. Also, addition of dimples alters the plate mode shapes and as a result changes the radiated sound power from the plate. This method is cost-effective in comparison with other structural dynamics modification methods because it can be achieved through a one-step manufacturing method and because it enhances the dynamic behavior of platelike structures without additional weight or added joints.

Copyright © 2011 by ASME

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