Journal of KSNVE (소음진동)

The Korean Society for Noise and Vibration Engineering (한국소음진동공학회)
권호 표지

A Study on Optimum Design of an Unconstrained Damping Steel Plate by Using Viscoelastic Damping Material

점탄성 제진재를 이용한 비구속형 제진강판의 최적설계에 관한 연구

  • 유영훈 (부산수산대학교, 기계공학과) ;
  • 양보석 (부산수산대학교, 기계공학과)
  • Published : 1995.12.01
Download PDF
⟨ Previous Next ⟩

Abstract

Optimum design of a viscoelastic damping layer which is unconstrainedly cohered on a steel plate is discussed from the viewpoint of the modal loss factor. Themodal loss factor is analyzed by using the energy method to the base steel plate and cohered damping layer. Optimum distributions of the viscoelastic damping layer for modes are obtained by sequentially changing the position of a piece of damping layer to another position which contributes to maximizing the modal loss factors. Analytical procedure performed by using this method simulated for 3 fundamental modes of an edge-fixed plate. Simulated results indicate that the modal loss factor ratios can be increase by as much as 210%, or more, by optimizing the thickness distribution of the damping layer to two times of the initial condition which is entirely covered. Optimum configurations for the modes are revealed by positions where added damping treatments become most effective. The calculated results by this method are validated by comparison with the experimental results and the calculated results obtained by the Ross-Ungar-Kerwin's model in the case of the layer is uniformly treated over the steel plate.

Keywords

References

  1. Acustica v.2 Uber die Damfting Der Biegeschwingungen Dunner Bleche durch Fest Haftende Belage Oberst,H.;Frankenfelt,K.
  2. Structural Damping, Sec.3, ASME Damping of Plate Flexural Vibrations by means of Viscoelastic Laminate Ross,D.;Ungar,D.E.E.;Kerwin,E.M.;J. E. Ruzicka(ed.)
  3. Proc. 3rd. Intl. Congr. on Acoustics, Stuttagart A Comparision of the Effectiveness of Homogeneous Layer and Constrained Layer of Viscoelastic Material in Damping Flexual Wave in Plates Kerwin;E.M.;Ross,D.
  4. Proc. Inter-Noise'81 Partial Damping Layer Treatments for Plates Stevens,K.K.;Kung,C.H.;Dunn,S.E.
  5. J. Sound Vib. v.103 Optimum Thickness Distribution of Unconstrained Viscoelastic Damping Treatments for Plates Parthasarathy,G.;Reddy,C.V.R.;Ganesen,N.
  6. AIAA Journal v.20 no.9 Finite Element Prediction of Damping in Structures with Constrained Viscoelastic Layers Johnson,C.D.;Kienholz,D.A.
  7. AIAA Journal v.30 no.3 Multiobjective Shape and Material Optimization of Composite Structures Including Damping Saravanos,D.A.;Chamis,C.C.
  8. International Journal for Numerical Methods in Engineering v.27 Optimum Design of Composite Structures Vanderplaats,G.N.;Weisshaar,T.A.
  9. AIAA Journal v.30 no.3 Optimum Design of a Composite Structure with Three Type Manufactureing Constraints Wang,B.P.;Costin,D.P.
  10. Theory of Linear Viscoelasticity Bland,D.R.
  11. The Theory of Sound v.1 Rayleigh,J.S.W.
  12. Second Edi. Theory of Plates and Shells Timoshenko,S.;Woinowsky-Krieger,S.
  13. NASA SP-160 Vibration of Plates Leissa,A.W.
  14. J. Sound Vib. v.33 Temperature-Frequency Dependency of Dynamic Properties of Damping Materials Jones,D.I.G.