Cylindrical shells with a constrained damping layer treatment are studied using three theories. The finite element method is made use of in the study. The nondimensional frequencies and loss factors predicted by the three theories are compared and the theories are evaluated. The importance of inclusion of the extensional effects in the core and its effect on the loss factor is brought out in this study. © 1995 by ASME.

T. C. Ramesh

Natrajan Ganesan

Cylinders (shapes)

Damping

finite element method

Natural frequencies

Sandwich structures

Strain

Vibrations (mechanical)

CONSTRAINED DAMPING TREATMENT

Cylindrical Shells

DAMPING ANALYSIS

LOSS FACTORS

RESONANT AMPLITUDE

Shells (structures)

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IIT Madras has been ranked as the top engineering institute in India for four years in a row by the National Institutional Ranking Framework of the MHRD

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IIT Madras

Vibration and damping analysis of cylindrical shells with constrained damping treatment - a comparison of three theories

Journal of Vibration and Acoustics, Transactions of the ASME

In this paper, vibration and damping of composite sandwich box column containing viscoelastic layer (VEL) or electrorheological fluid (ER) core with constraining layer and their performance comparison is carried out. The finite element based modal strain energy method is used for predicting the modal loss factor and frequency of laminated composite box columns with integral viscoelastic/ER fluid layers. Effects of core thickness, orientation of the fiber in the base plate and constraining layer, applied voltage and stacking sequence on the vibration behavior of composite sandwich box column for clamped-free boundary condition are studied in the paper. The performance comparison of vicsoelastic layer damping and ER layer damping is also investigated. © 2009 Elsevier Ltd. All rights reserved.

Materials and Design

Vibration and damping of composite sandwich box column with viscoelastic/electrorheological fluid core and performance comparison

In this paper, the vibration and damping of a hollow sandwich box column containing a viscoelastic layer (VEL) or an electrorheological (ER) or magnetorheological (MR) fluid core with a constraining layer are analyzed and a comparison of performance is made. The hollow sandwich box column comprises two skin plates and a VEL/ER/MR fluid core layer. The finite element method is used to study the vibration and damping behaviors of the column. The natural frequencies and modal loss factors are obtained by solving the complex eigenvalue problem. The modal dampings and natural frequencies of the column are calculated for various electric as well as magnetic fields and their performance is compared with that of the viscoelastic core layer for the clamped-free boundary condition. Effects of core thickness, electric voltage and magnetic field on the vibration behavior of the sandwich box column are investigated. © 2008 World Scientific Publishing Company.

International Journal of Structural Stability and Dynamics

Vibration and damping studies on a hollow sandwich box column with a viscoelastic/electrorheological/magnetorheological fluid core layer by the finite element method

AIAA Journal

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

Vibration and damping analysis of cylindrical shells with constrained damping treatment—a comparison of three theories

Journal	Journal of Vibration and Acoustics, Transactions of the ASME
ISSN	10489002
Open Access	No