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Wednesday, July 10 • 16:30 - 16:50
A PIECEWISE CALCULATION SCHEME FOR THE MID-TO-HIGH FREQUENCY STRONG COUPLING MODELLING

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Mid-to-high frequency vibro-acoustic system modeling is always a challenging topic due to the large number of the degrees of freedom involved. Popular tools like Statistical Energy Analysis (SEA) can hardly provide sufficient details on system response. To tackle the problem, a piecewise calculation scheme based on Condensed Transfer Function (CTF) method was previously proposed, which was shown to accommodate both the prediction accuracy and the modelling efficiency when dealing with a weakly-coupled vibro-acoustic system. This paper examines the applicability of the modelling method when the system involves strongly coupled sub-systems. The quantification of the coupling strength between sub-systems is first discussed by proposing a coupling strength factor based on the proposed CTF framework. A system composed of two coupled cavities is selected as an example to conduct the coupling strength analyses. The piecewise scheme is then validated by tactically tuning the coupling strength between the two sub-cavities. The effect of the coupling strength on the computational accuracy is studied.

Moderators
avatar for Simon Jones

Simon Jones

Associate Professor, Rose-Hulman Institute of Technology
Professional interests include undergraduate engineering education, finite element modeling, ground-borne vibrations, vibrations of musical instruments, and dynamics of toys.
GM

Guilhem Michon

Professor, ISAE-SUPAERO

Authors

Wednesday July 10, 2019 16:30 - 16:50 EDT
St-Laurent 7
  T07 Struct. dyn. & nonlin. vib., RS03 Struct ac & vibr