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2005, 24

I. Grushetsky, A. Smol’nikov

Determination of coupling loss factors for two beams using FEM

language: English

received 10.06.2005, published 11.08.2005

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ABSTRACT

Coupling loss factors (CLF) are most important for computing sound and vibration using SEA. CLF and internal loss factors (ILF) constitute a matrix of energy balance equations. CLF can be defined analytically, experimentally or using computational modeling. The latter way is most universal but less developed at present. Determination of CLF for two beams at right angle using FEM is presented in this paper. It is shown that CLF which are derived from numerical simulating are differ from analytical values. But numerical CLF in energy balance equations for structure of four beams provide better results than analytical CLF.

8 pages, 5 figures

Сitation: I. Grushetsky, A. Smol’nikov. Determination of coupling loss factors for two beams using FEM. Electronic Journal “Technical Acoustics”, http://www.ejta.org, 2005, 24.

REFERENCES

1. S. N. Ovsyannikov. Vibration propagation in buildings (in Russian). Tomsk Architectural University, 2000.
2. C. Hopkins. Statistical energy analysis of coupled plate systems with low modal density and low modal overlap. JSV. 2002, V. 251, No 2, pp. 193–214.
3. L. Cremer, M. Heckl, E. E. Ungar. Structure-Borne Sound, 2nd edition, Springer, Berlin, 1988.
4. Lyapunov V. T., Nikiforov A. S. Vibroinsulation in ship structures (in Russian). Leningrad, «Sudostroenie», 1975.


 

Igor V. Grushetsky , PhD, Krylov Shipbuilding Research Institute (St. Petersburg, Russia). Scientific area - noise and vibration measurements and control.

e-mail: editor(at)ejta.org

 
 

Andrey V. Smol’nikov - expert on computing of vibration and sound radiation of complex structures, Krylov Shipbuilding Research Institute (St. Petersburg, Russia)