Vibration and damping analysis of a multilayered cylindrical shell. I - Theoretical analysis

Alam, Naushad; Asnani, N.T.

doi:10.2514/3.8684

Cited by 65 publications

(22 citation statements)

References 6 publications

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“…vatures are given by (indices of the physical components of tensors are given in parentheses) [41]: (11) Here, the notations v (1) = u, v (2) = v are used for the physical components of the displacements. For shells of revolution it is convenient to use the coordinates x 1 = α, x 2 = ϕ (see Figure 1).…”

Section: Free Damped Vibrations Of Sandwich Shells Of Revolutionmentioning

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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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: Free Damped Vibrations Of Sandwich Shells Of Revolutionmentioning

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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“…Singh and Gupta (1996) presented two composite spinning shaft models based on an EMBT and a layerwise beam theory respectively. In the latter shaft model, the strain-displacement relations of the layerwise cylindrical shell theory considered by Alam and Asnani (1984) were adopted. They found that a discrepancy exists between the critical speeds obtained from these two models for the case of the unsymmetric laminated composite shaft, which they attributed to the effect of the bending and stretching deformation.…”

Section: Introductionmentioning

confidence: 99%

A simple spinning laminated composite shaft model

Chang

Chen

Chang

2004

International Journal of Solids and Structures

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“…(8) Rayleigh damping has been added to the structure with a factor of a r = 5.46 for the mass-proportional contribution to the damping and (3 r = 1.4110 -5 for the stiffness-proportional contribution. The factors a r and j3 r have been calculated so that the first and second eigenmode of the cylinder have a damping ratio of 0.01 which is a typical valué for multilayered cylindrical shell structures [45,46], During the production of the absorbers, the fibers are wound in different directions. This is modeled with a shell section that contains five layers of 0.610~3m thick.…”

Section: Falling Composite Cylindermentioning

confidence: 99%

Partitioned simulation of the interaction between an elastic structure and free surface flow

Degroote

Souto-Iglesias

Paepegem

et al. 2010

Computer Methods in Applied Mechanics and Engineering

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ARTICLE INFO ABSTRACT Keywords:Fluid-structure interaction Partitioned Free surface Volume-of-fluid Rolling tank Impact IQN-ILS Aitken relaxationCurrently, the interaction between free surface flow and an elastic structure is simulated with monolithic codes which calcúlate the deformation of the structure and the liquid-gas flow simultaneously. In this work, this interaction is calculated in a partitioned way with a sepárate flow solver and a sepárate structural solver using the interface quasi-Newton algorithm with approximation for the inverse of the Jacobian from a leastsquares model (IQN-ILS). The interaction between an elastic beam and a sloshing liquid in a rolling tank is calculated and the results agree well with experimental data. Subsequently, the impact of both a rigid cylinder and a flexible composite cylinder on a water surface is simulated to assess the effect of slamming on the components of certain wave-energy converters. The impact pressure on the bottom of the rigid cylinder is nearly twice as high as on the flexible cylinder, which emphasizes the need for fluid-structure interaction calculations in the design process of these wave-energy converters. For both the rolling tank simulations and the impact simulations, grid refinement is performed and the IQN-ILS algorithm requires the same number of iterations on each grid. The simulations on the coarse grid are also executed using Gauss-Seidel coupling iterations with Aitken relaxation which requires significantly more coupling iterations per time step.

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Vibration and damping analysis of a multilayered cylindrical shell. I - Theoretical analysis

Cited by 65 publications

References 6 publications

Free Damped Vibrations of Sandwich Shells of Revolution

Free Damped Vibrations of Sandwich Shells of Revolution

A simple spinning laminated composite shaft model

Partitioned simulation of the interaction between an elastic structure and free surface flow

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