The modal strain energy method is used to study the energy dissipation pattern in vibrating cylindrical shells with a viscoelastic damping layer, for various circumferential and axial modes. The effect of tank size, boundary condition and height of contained fluid on the distribution pattern is also investigated. The regions of energy dissipation concentration are identified. The effect of redistribution of the (initially uniformly distributed) constrained viscoelastic material by concentrating it in the above regions is studied.

C. Saravanan

N. Ganesan

Viswanatha Ramamurti

Damping

Energy dissipation

Shells (structures)

Strain

Vibration control

Viscoelasticity

MODAL LOSS FACTOR

MODAL STRAIN ENERGY METHOD

Structural analysis

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IIT Madras

Study on energy dissipation pattern in vibrating fluid filled cylindrical shells with a constrained viscoelastic layer

Computers and Structures

The finite element code is developed based on the displacement field proposed by Wilkins et al. to find out the natural frequencies and loss factors of fluid filled cylindrical shells with a constrained viscoelastic layer in between two facings made of composite material. The fluid effect on the natural frequencies and loss factors are taken care of by the added mass of the fluid on the structure. Effects of the fluid height, ratio of core to facing thickness and facing fibre orientation on the natural frequencies and loss factors of cylindrical shells are presented.

Vibration and damping analysis of fluid filled orthotropic cylindrical shells with constrained viscoelastic damping

The free vibration and damping characteristics of three-layered conical shells with a viscoelastic core constrained by isotropic facings are studied using the finite element method. Results are presented for shells with various geometric and physical parameters. Three boundary conditions are considered in the analysis: clamped-clamped, simply supported and clamped at the small end and free at the other. © 1994 Academic Press Limited.

Journal of Sound and Vibration

Finite element analysis of conical shells with a constrained viscoelastic layer

The natural frequencies and loss factors in cylindrical shells with a constrained viscoelastic layer between two isotropic, elastic facings are studied using the finite element method. The finite element is developed based on a discrete layer theory assuming variation of inplane displacements across the thickness and a constant transverse displacement. Effects of the boundary conditions, shear parameter and ratio of core to facing thickness on the natural frequencies and loss factors of cylindrical shells are presented. © 1993.

Vibration and damping analysis of cylindrical shells with a constrained damping layer

Computers & Structures

Axisymmetric vibration of multilayered conical shells with core layers of viscoelastic material

Damping and vibration control of unidirectional composite laminates using add-on viscoelastic materials

Journal	Computers and Structures
ISSN	00457949
Open Access	No