Passive and active damping in a large space structure (LSS) is important in terms of performance under a dynamic load. Structural damping mostly arises as the result of many energy dissipation mechanisms acting in a system. The purpose of this paper is to present the spectrally formulated finite element analysis for vicsoelastically damped LSS. Using a fractional derivative model, the non-linear damping characteristics of a viscoelastic material have been modelled. The proposed method is then been extended to derive the dynamic response of a large truss structure using a computer program.
Get full access to this article
View all access options for this article.
References
1.
DoyleJ.F. and FarrisT. N., A Spectrally Formulated Finite Element For Flexural Wave Propagation in Beams, International Journal of Analytical And Experimental Modal Analysis, 5(2), 1990, 99-107.
2.
HorrA.M. and SchmidtL. C., A Comparative Study of Performance of Various Finite Element Methods for the Vibration of a Beam, Proceedings of International Conference on Computational Methods in Structural and Geotechnical Engineering, Vol. 2, Hong Kong, December, 1994, 618-623.
3.
Rabotnov YuN., Elements of Hereditary Solid Mechanics, Mir Publishers, Moscow, 1980.
4.
KoellerR.C., Application of Fractional Calculus to the Theory of Viscoelasticity, Journal of Applied Mechanics, Vol. 51, 1984, 299-307.
JonesD.I.G., Viscoelastic Materials for Damping Applications, in: TorvikP. J. ed, Damping Applications for Vibration Control, ASME, New York, 1980, 27-51.
7.
BagleyR.L., Application of Generalised Derivatives to Viscoelasticity, PhD Thesis, Air Force Institute of Technology, 1979.
8.
LesieutreG.A., Finite Element Modeling of Frequency-Dependent Material Damping Using Augmenting Thermodynamic Fields, PhD thesis, University of California, 1989.
