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2006, 10

I. Grushetsky, A. Smol’nikov

Computing of coupling loss factors using FEM, probabilistic approach

language: English

received 15.03.2006, published 02.05.2006

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ABSTRACT

Technique for coupling loss factors (CLF) determination with taking into account uncertainty of subsystems is presented. Two beams in junction are considered by an example. Random variables are beams length, which obey the normal distribution law. Finite Element Method (FEM) is used for CLF computing. To verify the technique validity computation example is presented for structure that consists of four sequentially joined beams with uncertain length. Calculations are carried out using two techniques: FEM and Energy Method (EM). It is shown that computing results by two techniques agree well both for mean values and for dispersion.

14 pages, 11 figures

Сitation: I. Grushetsky, A. Smol’nikov. Computing of coupling loss factors using FEM, probabilistic approach. Electronic Journal “Technical Acoustics”, http://www.ejta.org, 2006, 10.

REFERENCES

1. L. Cremer, M. Heckl, E. E. Ungar. Structure-Borne Sound, 2nd edition, Springer, Berlin, 1988.
2. Lyapunov V. T., Nikiforov A. S. Vibroinsulation in ship structures (in Russian). Leningrad, «Sudostroenie», 1975.
3. S. N. Ovsyannikov. Vibration propagation in buildings (in Russian). Tomsk Architectural University, 2000.
4. 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.
5. F. Fahy. Foundations of Engineering Acoustics. Academic Press, 2001.
6. Yang S. J., Ellison A. J. Machinery noise measurements. Oxford University Press, 1985.
7. I. Grushetsky, A. Smol’nikov. Comparison of FEM and SEA for vibration computing in periodic structures. Electronic Journal «Technical Acoustics», http://www.ejta.org, 2005, 9.
8. C. Hopkins. Statistical energy analysis of coupled plate systems with low modal density and low modal overlap. JSV. 2002, V. 251, N° 2, pp. 193–214.
9. Phil Shorter, Robin Langley. Numerical and Experimental Validation of Hybrid FE-SEA Method. NOISE-CON 2004, pp. 380–388.


 

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

e-mail: editor(at)ejta.org

 
 

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