Engineering Transactions, 24, 3, pp. 479-498, 1976

Structural Damping in Sandwich Shells

Ho Thien Tuan

S. Łukasiewicz

The basic equations governing the motion of sandwich shells are derived through the use of a variational procedure. Structural damping is investigated in the case of a cylindrical sandwich shell with dissimilar facings, executing axially symmetric free vibrations. The concept of the complex modulus is used in order to describe the viscoelasticity of the core. The various frequency parameters of the shell and their associated damping parameters are obtained and analyzed with regard to the ratios of different layers thicknesses and other geometrical and physical properties of the sandwich shell. Curves obtained from numerical results are presented.

Full Text: PDF
Copyright © Polish Academy of Sciences & Institute of Fundamental Technological Research (IPPT PAN).


HO THIEN TUAN, ST. LUKASIEWICZ, Structural damping in sandwich plates, Archiwum Budowy Maszyn, 22, 2, 1975.

HO THIEN TUAN, ST. LUKASIEWICZ, Some results about the structural damping in sandwich plates, Archiwum Budowy Maszyn (to be published).

M.P. BIENICK, A. M. FREUDENTHAL, Forced vibrations of cylindrical sandwich shells, I. Aero. Sci., 29, 1962,

Y. Y. YU, Viscoelastic damping of vibrations of sandwich plates and shells, Non-Classial Shell Problems, Proceedings, Symposium, Warsaw, North-Holland Publishing Company, Amsterdam 1964.

H. KRAUS, Thin elastic shells, New York, Wiley, 1967.

ST. LUKASIEWICZ, Obciążenia skupione w płytach, tarczach i powłokach, Biblioteka Mechaniki Stosowanej, PWN, 1976.

E. DURAND, Solutions numériques des équations algèbriques, Vol. I, Masson and Cie, 1971.