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    Vibration behavior of laminated composite beams integrated with magnetorheological fluid layer

    , Article Journal of Mechanics ; 2016 , Pages 1-9 ; 17277191 (ISSN) Naji, J ; Zabihollah, A ; Behzad, M ; Sharif University of Technology
    Cambridge University Press 
    Abstract
    Vibration behavior of adaptive laminated composite beams integrated with magnetorheological (MR) fluid layer has been investigated using layerwise displacement theory. In most of the existing studies on the adaptive laminated beams with MR fluids, shear strain across the thickness of magnetorheological (MR) layer has been assumed a constant value, resulting in a constant shear stress in MR layer. However, due to the high shear deformation pattern inside MR layer, this assumption is not adequate to accurately describe the shear strain and stress in MR fluid layer. In this work a modified layerwise theory is employed to develop a Finite Element Model (FEM) formulation to simulate the laminated... 

    Attenuation of random vibration in plates

    , Article AES-ATEMA International Conference Series - Advances and Trends in Engineering Materials and their Applications, 1 September 2009 through 4 September 2009, Hamburg ; 2009 , Pages 57-63 ; 19243642 (ISSN) ; 9780978047962 (ISBN) Jolghazi, S ; Mehdigholi, H ; Behzad, M ; Sharif University of Technology
    Abstract
    This paper is a study on control of vibration of plate subjected to random vibration loading using magnetorheological (MR) dampers. Some key issues, i.e. model reduction, modeling of the MR dampers and their applications in vibration control of plates, are addressed in this work. MR dampers are semi-active devices that use MR fluids to produce a controllable damping with low power requirement. In this paper, first, a model reduction method for preparing a reduce order model (ROM) is presented. The method uses an optimal model truncation method which in it the ROM to be constructed such that it will provide the same frequency response characteristics as the original full model within the...