More on finite element modeling of damped composite systems

Abstract Finite element procedures are developed and verified for layered beams and rings having either continuously or discontinuously constrained viscoelastic damping layers. The two configurations considered are (1) a three-layered sandwich beam or ring (closed curved beam) consisting of two thin elastic layers with a viscoelastic core in between, and (2) a damped composite made of a thin-walled elastic structure having a finite number of mass segments or elastic segments adhered to it by a viscoelastic material. Viscoelastic material dependence on frequency and temperature is accounted for. Numerical predictions of transverse driving point impedances agree very well with available experimental data.

[1]  B. E. Douglas,et al.  On the forced vibrations of three-layer damped sandwich beams† , 1974 .

[2]  B. C. Nakra,et al.  Vibrations of unsymmetrical sandwich beams and plates with viscoelastic cores , 1974 .

[3]  R. Ditaranto.  Theory of Vibratory Bending for Elastic and Viscoelastic Layered Finite-Length Beams , 1965 .

[4]  B. E. Douglas,et al.  Mechanical impedance of damped three-layered sandwich rings. , 1973 .

[5]  M. Yan,et al.  Governing Equations for Vibrating Constrained-Layer Damping Sandwich Plates and Beams , 1972 .

[6]  D. J. Mead,et al.  The forced vibration of a three-layer, damped sandwich beam with arbitrary boundary conditions , 1969 .

[7]  G. C. Everstine,et al.  Vibrations of three layered damped sandwich plate composites , 1979 .

[8]  Y. Lu,et al.  An analytical formulation of the forced responses of damped rings , 1976 .

[9]  H. Oberst,et al.  A discussion on the origin and treatment of noise in industrial environments - Reduction of noise by the use of damping materials , 1968, Philosophical Transactions of the Royal Society of London. Series A, Mathematical and Physical Sciences.

[10]  Jerome E. Ruzicka,et al.  Damping Structural Resonances Using Viscoelastic Shear-Damping Mechanisms: Part II—Experimental Results , 1961 .

[11]  Jerome E. Ruzicka.  Damping Structural Resonances Using Viscoelastic Shear-Damping Mechanisms: Part I—Design Configurations , 1961 .

[12]  E. Kerwin.  Damping of Flexural Waves by a Constrained Viscoelastic Layer , 1959 .

[13]  D. J. Mead.  The damping properties of elastically supported sandwich plates , 1972 .

[14]  Flexural Vibration of Symmetrical Multi-Layer Beams with Viscoelastic Damping: , 1968 .

[15]  J. R. McGraw,et al.  Vibratory Bending of Damped Laminated Plates , 1969 .

[16]  T. G. Butler,et al.  NASTRAN - A summary of the functions and capabilities of the NASA structural analysis computer system , 1971 .