The restriction of deformations to a subregion of a system undergoing either free or forced vibration due to an irregularity or discontinuity in it is called mode localization. Here, we study mode localization in free and forced vibration of monolithic and unidirectional fiber-reinforced rectangular linearly elastic plates with edges either simply supported (SS) or clamped by using a third-order shear and normal deformable plate theory (TSNDT) with points on either one or two normals to the plate midsurface constrained from translating in all three directions. The plates studied are symmetric about their midsurfaces. The in-house developed software based on the finite element method (FEM) is first verified by comparing predictions from it with either the literature results or those computed by using the linear theory of elasticity and the commercial FE software abaqus. New results include: (i) the localization of both in-plane and out-of-plane modes of vibration, (ii) increase in the mode localization intensity with an increase in the length/width ratio of a rectangular plate, (iii) change in the mode localization characteristics with the fiber orientation angle in unidirectional fiber reinforced laminae, (iv) mode localization due to points on two normals constrained, and (iv) the exchange of energy during forced harmonic vibrations between two regions separated by the line of nearly stationary points that results in a beats-like phenomenon in a subregion of the plate. Constraining translational motion of internal points can be used to design a structure with vibrations limited to its small subregion and harvesting energy of vibrations of the subregion.
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February 2019
Research-Article
Free and Forced Vibrations of Monolithic and Composite Rectangular Plates With Interior Constrained Points
Arka P. Chattopadhyay,
Arka P. Chattopadhyay
Department of Biomedical Engineering
and Mechanics,
M/C 0219 Virginia Polytechnic
Institute and State University,
495 Old Turner Street,
Blacksburg, VA 24061
e-mail: arka@vt.edu
and Mechanics,
M/C 0219 Virginia Polytechnic
Institute and State University,
495 Old Turner Street,
Blacksburg, VA 24061
e-mail: arka@vt.edu
Search for other works by this author on:
Romesh C. Batra
Romesh C. Batra
Honorary Fellow
Department of Biomedical Engineering
and Mechanics,
M/C 0219 Virginia Polytechnic
Institute and State University,
Blacksburg, VA 24061
e-mail: rbatra@vt.edu
Department of Biomedical Engineering
and Mechanics,
M/C 0219 Virginia Polytechnic
Institute and State University,
495 Old Turner Street
,Blacksburg, VA 24061
e-mail: rbatra@vt.edu
Search for other works by this author on:
Arka P. Chattopadhyay
Department of Biomedical Engineering
and Mechanics,
M/C 0219 Virginia Polytechnic
Institute and State University,
495 Old Turner Street,
Blacksburg, VA 24061
e-mail: arka@vt.edu
and Mechanics,
M/C 0219 Virginia Polytechnic
Institute and State University,
495 Old Turner Street,
Blacksburg, VA 24061
e-mail: arka@vt.edu
Romesh C. Batra
Honorary Fellow
Department of Biomedical Engineering
and Mechanics,
M/C 0219 Virginia Polytechnic
Institute and State University,
Blacksburg, VA 24061
e-mail: rbatra@vt.edu
Department of Biomedical Engineering
and Mechanics,
M/C 0219 Virginia Polytechnic
Institute and State University,
495 Old Turner Street
,Blacksburg, VA 24061
e-mail: rbatra@vt.edu
1Corresponding author.
Contributed by the Technical Committee on Vibration and Sound of ASME for publication in the JOURNAL OF VIBRATION AND ACOUSTICS. Manuscript received June 10, 2018; final manuscript received August 9, 2018; published online September 17, 2018. Assoc. Editor: Julian Rimoli.
J. Vib. Acoust. Feb 2019, 141(1): 011018 (15 pages)
Published Online: September 17, 2018
Article history
Received:
June 10, 2018
Revised:
August 9, 2018
Citation
Chattopadhyay, A. P., and Batra, R. C. (September 17, 2018). "Free and Forced Vibrations of Monolithic and Composite Rectangular Plates With Interior Constrained Points." ASME. J. Vib. Acoust. February 2019; 141(1): 011018. https://doi.org/10.1115/1.4041216
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