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Inventi Impact - Acoustics

Articles

  • Inventi:eas/69/14
    OPTIMIZATION OF NATURAL FREQUENCIES AND SOUND POWER OF BEAMS USING FUNCTIONALLY GRADED MATERIAL
    Nabeel T Alshabatat, Koorosh Naghshineh

    This paper presents a design method to optimize the material distribution of functionally graded beams with respect to some vibration and acoustic properties. The change of thematerial distribution through the beamlength alters the stiffness and the mass of the beam. This can be used to alter a specific beam natural frequency. It can also be used to reduce the sound power radiated from the vibrating beam. Two novel volume fraction laws are used to describe the material volume distributions through the length of the FGM beam.The proposed method couples the finite elementmethod (for the modal and harmonic analysis), Lumped ParameterModel (for calculating the power of sound radiation), and an optimization technique based on Genetic Algorithm. As a demonstration of this technique, the optimization procedure is applied to maximize the fundamental frequency of FGM cantilever and clamped beams and to minimize the sound radiation from vibrating clamped FGM beam at a specific frequency.

    How to Cite this Article
    CC Compliant Citation: Nabeel T. Alshabatat and Koorosh Naghshineh, “Optimization of Natural Frequencies and Sound Power of Beams Using Functionally Graded Material,” Advances in Acoustics and Vibration, vol. 2014, Article ID 752361, 10 pages, 2014. doi:10.1155/2014/752361. Copyright © 2014 Nabeel T. Alshabatat and Koorosh Naghshineh. This is an open access article distributed under the Creative Commons Attribution License (http://creativecommons.org/licenses/by/3.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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