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Steel and Composite Structures
  Volume 43, Number 5, June10 2022 , pages 533-552
DOI: https://doi.org/10.12989/scs.2022.43.5.533
 


Dynamic stability and structural improvement of vibrating electrically curved composite screen subjected to spherical impactor: Finite element and analytical methods
Caiyuan Xiao and Guiju Zhang

 
Abstract
    The current article deals with the dynamic stability, and structural improvement of vibrating electrically curved screen on the viscoelastic substrate. By considering optimum value for radius curvature of the electrically curved screen, the structure improvement of the system occurs. For modeling the electrically system, the Maxwell's' equation is developed. Hertz contact model in employed to obtain contact forces between impactor and structure. Moreover, variational methods and nonlinear von Kármán model are used to derive boundary conditions (BCs) and nonlinear governing equations of the vibrating electrically curved screen. Galerkin and Multiple scales solution approach are coupled to solve the nonlinear set of governing equations of the vibrating electrically curved screen. Along with the analytical solution, 3D finite element simulation via ABAQUS package is provided with the aid of a FE package for simulating the current system's response. The results are categorized in 3 different sections. First, effects of geometrical and material parameters on the vibrational performance and stability of the curves panel. Second, physical properties of the impactor are taken in to account and their effect on the absorbed energy and velocity profile of the impactor are presented. Finally, effect of the radius and initial velocity on the mode shapes of the current structure is demonstrated.
 
Key Words
    Coupled Galerkin and Multiple Scales methods; Energy absorption; structural improvement; vibrating electrically curved screen; Von-Karman nonlinearity
 
Address
Caiyuan Xiao and Guiju Zhang:1)Key Laboratory of Hunan Province for Efficient Power System and Intelligent Manufacturing, Shaoyang 422000, Hunan, China
2)College of Mechanical and Energy Engineering, Shaoyang University, Shaoyang 422000, Hunan, China
 

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