Antisymmetric vibrations of multilayered conical shells with constrained viscoelastic layers

Khatri, K.N.

doi:10.1016/0020-7683(95)00159-x

Cited by 6 publications

(3 citation statements)

References 11 publications

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“…sandwich shell is given by (22) and the kinetic energy can be written in the form (23) here ρ is the mass density, (… • ) denotes differentiation with respect to time and u T = {v T ,␥ T }. A shell is the surface area of the shell and h is the thickness of the shell.…”

Section: Variational Formulationmentioning

confidence: 99%

“…Vibrational damping analysis of laminated composite beam and plates has been investigated by several authors [14,19,25,32,42]. The application to laminated shells is discussed, for example, in References [2,3,8,15,22,23,33,35,43,44,48]. Though the damping characteristics of laminated composite structures have been studied extensively, studies of sandwich composite structures are limited.…”

Section: Introduction Dmentioning

confidence: 99%

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Free Damped Vibrations of Sandwich Shells of Revolution

Korjakin

Rikards

Altenbach

et al. 2001

Jnl of Sandwich Structures & Materials

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Using a zig-zag model the free damped vibrations of sandwich shells of revolution are investigated. As special cases the vibration analysis under consideration of damping of cylindrical, conical and spherical sandwich shells is performed. A specific sandwich shell finite element with 54 degrees of freedom is employed. Starting from the energy method the damping model is developed. Numerical examples for the free vibration analysis with damping based on the proposed finite element approach are discussed. Results for sandwich shells show a satisfactory agreement with various reference solutions.

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Section: Variational Formulationmentioning

confidence: 99%

Section: Introduction Dmentioning

confidence: 99%

Free Damped Vibrations of Sandwich Shells of Revolution

Korjakin

Rikards

Altenbach

et al. 2001

Jnl of Sandwich Structures & Materials

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“…Douglas and Yang (3) modified the theories and applied it to different applications. In last decades, many authors have reported new formulations and techniques, e.g., for beams (4), (5) , for plates (6), (7) and for shells (8)(9)(10)(11) . Johnson (12) summarized the passive damping related works.…”

Section: Introductionmentioning

confidence: 99%

Damping Property and Vibration Analysis of Blades with Viscoelastic Layers

Huang

Chiu

2007

JSDD

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This paper showed the damping effect and the vibration analysis of a shaft-disk-blade system with viscoelastic layers on blades. The focus of the research is on the shaft's torsional vibration and the blade's bending vibration. The equations of motion were derived from the energy approach. This model, unlike the previous, used only two displacement functions for layered blades. Then, the assumed-modes method was employed to discretize the equations. The analyses of natural frequencies damping property were discussed afterwards. The numerical results showed the damping effects due to various constraining layer (CL) thickness and viscoelastic material (VEM) thickness. The research also compared FRF's of the systems with and without viscoelastic layers. It is concluded that both CL and VEM layers promote the damping capability but the marginal effect decreases with their thickness. The CLD treatment also found drop the natural frequencies slightly.

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