Electronic Journal Technical Acoustics ISSN 1819-2408

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.

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		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)