More on finite element modeling of damped composite systems

Lu, Y.P.; Everstine, G. C.

doi:10.1016/0022-460x(80)90606-9

Cited by 18 publications

(9 citation statements)

References 18 publications

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“…Flexural vibrations of damped sandwich plates and structures have been investigated by a number of authors [1][2][3][4][5][6][7][8][9][10][11]. The simplified governing equations and corresponding boundary conditions of flexural vibration of viscoelastically damped unsymmetrical sandwich plates have been given in reference [I 1].…”

Section: Introductionmentioning

confidence: 99%

A finite element analysis of viscoelastically damped sandwich plates

1992

Journal of Sound and Vibration

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A finite element analysis associated with an asymptotic solution method for the harmonic flexural vibration of viscoelastically damped unsymmetrical sandwich plates is given. The element formulation is based on generalization of the discrete Kirchhoff theory (DKT) element formulation. The results obtained with the first order approximation of the asymptotic solution presented here are the same as those obtained by means of the modal strain energy (MSE) method. By taking more terms of the asymptotic solution, with successive calculations and use of the Pad6 approximants method, accuracy can be improved. The finite element computation has been verified by comparison with an analytical exact solution for rectangular plates with simply supported edges. Results for the same plates with clamped edges are also presented.

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Section: Introductionmentioning

confidence: 99%

A finite element analysis of viscoelastically damped sandwich plates

1992

Journal of Sound and Vibration

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“…Dowell et al [21] derived equations governing the vibration of CLD plates and beams. Lu et al [22] proposed a finite element model with damping to simulate the vibration of beams, plates, and rings and compared simulation and experimental results. John [23] conducted finite element analyses, deriving damping ratios and loss factors in different modes.…”

Section: Journal Of Mechanical Design and Vibrationmentioning

confidence: 99%

Constrained-layer Damping Applied to DCJ Vibration Isolation Design

Luo¹

2017

JMDV

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A dual piezoelectric cooling jet (DCJ) is an innovative cooling device that uses piezoelectric materials to generate high-speed vibrations, thereby causing changes in the flow field to achieve heat exchange. Despite its high cooling efficiency, a DCJ transfers vibrations through its supporting base to its peripheral devices. To attenuate vibrations from DCJs, this study employed constrained-layer damping (CLD)-a technique for suppressing vibrations-to develop a base for cooling devices and to propose a C-DCJ model. ANSYS simulation of the vibrations of a DCJ and the C-DCJ suggested that, under the same vibration conditions and with the same levels of cooling efficiency, the amplitude and acceleration of the base on the C-DCJ were 30%-50% lower than that on the DCJ. Thus, the proposed C-DCJ effectively isolated vibration transfer.

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“…Predictions of structural damping property are very important, as well as resonant frequency extractions, and thus several studies on methods for calculating the damping effectiveness of laminated and sandwich structures have been reported [23,24,[49][50][51][52][53]. In this study, among the various methods for damping characterizations, modal loss factor estimation by the modal strain energy method [51][52][53] is picked up and implemented into the present finite-element free vibration analysis.…”

Section: Calculation Of Modal Loss Factorsmentioning

confidence: 99%

“…For numerical prediction of modal loss factors as damping effectiveness of laminates, the modal strain energy method [49][50][51][52][53] is also implemented into the present FE free-vibration analysis program. For numerical prediction of modal loss factors as damping effectiveness of laminates, the modal strain energy method [49][50][51][52][53] is also implemented into the present FE free-vibration analysis program.…”

Section: Introductionmentioning

confidence: 99%

Vibration and Damping Prediction of Laminates with Constrained Viscoelastic Layers--Numerical Analysis by a Multilayer Higher-Order-Deformable Finite Element and Experimental Observations

Suzuki

Kageyama

Kimpara

et al. 2003

Mechanics of Advanced Materials and Structures

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In this article, a multilayered and higher-order-deformable finite element is developed for free vibration analysis of multilayer-deformable laminates such as laminated plates with constrained viscoelastic interlayers. The developed finite element (FE) is based both on the multilayer theory and on the higher-order theory, in which the cubic variations of the in-plane displacements and the quadratic of the out-of-plane displacements are assumed for each discrete layer. In the present multilayer FE, the displacement continuity constrains at the layer interfaces are enforced through the penalty function method. For numerically predicting modal loss factors as damping effectiveness of laminates, the modal strain energy method is also implemented into the present FE analysis. In addition to the FE development, well-devised experimental measurements are conducted to obtain dynamic properties of several actually fabricated laminated coupons and sandwich panels, which contain some viscoelastic layers for improving damping 43 Downloaded by [Queensland University of Technology] at 04:03 02 November 2014 44 K. Suzuki et al.performance. Comparisons of the numerical results by the present and the conventional FEs with the experimental results obtained are made to investigate the accuracy and validity of both the present FE and the experiment itself for dynamic characterization of such special-purpose, multilayer-deformable laminates and sandwiches as are dealt with in this study.

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More on finite element modeling of damped composite systems

Cited by 18 publications

References 18 publications

A finite element analysis of viscoelastically damped sandwich plates

A finite element analysis of viscoelastically damped sandwich plates

Constrained-layer Damping Applied to DCJ Vibration Isolation Design

Vibration and Damping Prediction of Laminates with Constrained Viscoelastic Layers--Numerical Analysis by a Multilayer Higher-Order-Deformable Finite Element and Experimental Observations

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