Natrajan Ganesan

SANDWICH STRUCTURES - VIBRATIONS

STRUCTURAL ANALYSIS - Mathematical Models

DAMPED SANDWICH PANELS

DAMPED STRINGERS STIFFENER

Free Vibrations

Structural panels

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IIT Madras

Free vibration characteristics of damped sandwich panel stiffened with damped stringers

Journal of Sound and Vibration

Free vibration characleristics of a damped stiffened panel with applied viscoelastic damping on the flanges of the stiffeners are studied using finite element method. The complex nature of the rotational and transverse stiffnesses of the stringers is taken into consideration while deriving the stiffness and mass matrices of the damped stiffener element. The finite element method consists of representing the panel by rectangular plate elements of 12 d.o.f. and the stiffeners by beam elements of 8 d.o.f. which allow for bending, torsional and warping effects. Numerical results showing the effect of the geometric and material properties of the damping layer treatment on the resonant frequencies and loss factors of the composite panel are presented. © 1986.

Computers and Structures

Finite element free vibration analysis of damped stiffened panels

Free vibration characteristics of periodically stiffened panels with damped stringers

Influence of applied damping treatment in different configurations on the overall damping of periodic structures

Free vibration characteristics of a periodically stiffened panel with unconstrained viscoelastic damping layers applied to the flanges of the stringers are analyzed by using the wave propagation approach. Periodic structure theory in conjunction with the concept of damped forced waves is used in the determination of resonant frequencies and the associated loss factors of the composite structure. The complex nature of the rotational and transverse stiffnesses of the stringers is taken into consideration in the analysis. Numerical results showing the effect of the geometric and material properties of the damping layer treatment on the resonant frequencies and loss factors of the composite panel are presented. © 1984.

Receptance method for bi-coupled damped periodic structures

Journal	Journal of Sound and Vibration
ISSN	0022460X
Open Access	No