๐”– Bobbio Scriptorium
โœฆ   LIBER   โœฆ

Damped Free Vibrations of Layered Composite Cylindrical Shells

โœ Scribed by S.P. Singh; K. Gupta


Publisher
Elsevier Science
Year
1994
Tongue
English
Weight
596 KB
Volume
172
Category
Article
ISSN
0022-460X

No coin nor oath required. For personal study only.

โœฆ Synopsis


System loss factors corresponding to various shell modes have been evaluated by using a complex modulus approach. The damped free vibrations of composite cylindrical shells have been analyzed by using a first order shear deformation theory, in which one assumes a uniform distribution of the transverse shear across the thickness, compensated with a correction factor. The results indicate that the modal system loss factors are more sensitive to the various parametric changes than the frequency values. The results also show the effect of the lamination scheme on the system loss factors. An attempt has been made to interpret the various trends shown by the frequencies and loss factors in terms of the physical behavior of the shell.


๐Ÿ“œ SIMILAR VOLUMES


A layer-wise analysis for free vibration
โœ K.H. Huang; A. Dasgupta ๐Ÿ“‚ Article ๐Ÿ“… 1995 ๐Ÿ› Elsevier Science ๐ŸŒ English โš– 640 KB

A semi-analytical, three-dimensional, layer-wise theory is proposed, to solve for various orders of natural frequencies, and mode shapes of thick, arbitrarily laminated, composite cylindrical panels with three-dimensional boundary conditions at the four edges being any combination of free, simply su

Free Damped Flexural Vibration Analysis
โœ S.P. Singh; K. Gupta ๐Ÿ“‚ Article ๐Ÿ“… 1994 ๐Ÿ› Elsevier Science ๐ŸŒ English โš– 672 KB

An investigation is described of the free vibration characteristics, i.e., natural frequencies and damping ratios in flexural modes of cylindrical tubes made from fibre reinforced materials with potential usage as composite shafts. This paper is concerned with only the first circumferential modes, w

VIBRATIONS OF THICK ROTATING LAMINATED C
โœ K.Y. LAM; WU QIAN ๐Ÿ“‚ Article ๐Ÿ“… 1999 ๐Ÿ› Elsevier Science ๐ŸŒ English โš– 175 KB

Free vibrations of thick rotating cross-ply laminated composite cylindrical shells are studied based on the "rst order shear deformation shell theory (FSDT). The governing equations of "ve degrees of freedom with consideration of Coriolis accelerations and rotary inertias are established. Analytical

Free Vibration and Material Damping Anal
โœ K.R. Sivadas; N. Ganesan ๐Ÿ“‚ Article ๐Ÿ“… 1994 ๐Ÿ› Elsevier Science ๐ŸŒ English โš– 465 KB

The free vibration and the effect of material damping on damping factors are analyzed. An improved shell theory with shear deformation and rotatory inertia has been used, together with a semi-analytical higher order sub-parametric finite element with five nodes per element and 25 degrees of freedom.

ACTIVE CONSTRAINED LAYER DAMPING OF THIN
โœ M.C. RAY; J. OH; A. BAZ ๐Ÿ“‚ Article ๐Ÿ“… 2001 ๐Ÿ› Elsevier Science ๐ŸŒ English โš– 315 KB

The e!ectiveness of the active constrained layer damping (ACLD) treatments in enhancing the damping characteristics of thin cylindrical shells is presented. A finite element model (FEM) is developed to describe the dynamic interaction between the shells and the ACLD treatments. Experiments are perfo