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The Magneto-Elastic Internal Resonances of Rectangular Conductive Thin Plate With Different Size Ratios

Published online by Cambridge University Press:  15 May 2017

J. Li ,
Y. D. Hu  and
Y. N. Wang
J. Li
Affiliation:
Key Laboratory of Mechanical Reliability for Heavy Equipment and Large Structures of Hebei ProvinceYanshan UniversityQinhuangdao, China Department of Basic TeachingTangshan UniversityTangshan, China
Y. D. Hu*
Affiliation:
Key Laboratory of Mechanical Reliability for Heavy Equipment and Large Structures of Hebei ProvinceYanshan UniversityQinhuangdao, China
Y. N. Wang
Affiliation:
School of EngineeringDeakin UniversityWaurn Ponds campusGeelong, Australia
*
*Corresponding author ([email protected])
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Abstract

Based on the basic equations of electromagnetic elastic motion and the expression of electromagnetic force, the electromagnetic vibration equation of the rectangular thin plate in transverse magnetic field is obtained. For a rectangular plate with one side fixed and three other sides simply supported, its time variable and space variable are separated by the method of Galerkin, and the two-degree-of-freedom nonlinear Duffing vibration differential equations are proposed. The method of multiple scales is adopted to solve the model equations and obtain four first-order ordinary differential equations governing modulation of the amplitudes and phase angles involved via 1:1 or 1:3 internal resonances with different size ratios. With a numerical example, the time history response diagrams, phase portraits and 3-dimension responses of two order modal amplitudes are respectively captured. And the effects of initial values, thickness and magnetic field intensities on internal resonance characteristics are discussed respectively. The results also present obvious characteristics of typical nonlinear internal resonance in this paper.

Keywords

Magneto elasticRectangular conductive thin plateInternal resonanceMultiple-scale
Type
Research Article
Information
Journal of Mechanics , Volume 34 , Issue 5 , October 2018 , pp. 711 - 723
Copyright
Copyright © The Society of Theoretical and Applied Mechanics 2018 

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