Application of inverse SEA models to obtain the Coupling LossFactor in structural junctions from numerical simulations

Visualitza/Obre
Tipus de documentText en actes de congrés
Data publicació2019
Condicions d'accésAccés obert
Tots els drets reservats. Aquesta obra està protegida pels drets de propietat intel·lectual i
industrial corresponents. Sense perjudici de les exempcions legals existents, queda prohibida la seva
reproducció, distribució, comunicació pública o transformació sense l'autorització del titular dels drets
Abstract
An inverse SEA procedure that mimics the Experimental SEA (ESEA) is used in order to obtain the Coupling Loss Factor (CLF) of structural junctions. The main differences with respect to ESEA are that: 1) the subsystem energies and input powers are obtained by means of numerical simulations; and 2) the internal damping is imposed and must not be determined a posteriori (which allows reorganisation of the equations). The numerical model is based on the Spectral Finite Element Method (SFEM). This helps in order to cover a large frequency range without increasing the number of elements and to efficiently perform a large number of simulations with different load configurations (both aspects are required by the inverse SEA procedure). The contribution analyses several aspects such as: various options to obtain the input power from the numerical model; possible modifications in the background SEA model in order to avoid negative CLF values;assessment of the validity of the SEA hypotheses; possible shortcuts in order to avoid matrix singularities or to deal with abundant data. Finally, it is shown how the CLF values obtained for simple configurations can be used to model the response of more complex structures.
CitacióPoblet-Puig, J.; Rodriguez-Ferran, A. Application of inverse SEA models to obtain the Coupling LossFactor in structural junctions from numerical simulations. A: International Congress and Exposition on Noise Control Engineering. "48th International Congress and Exhibition on Noise Control Engineering (INTERNOISE 2019): Madrid, Spain: 16-19 june, 2019: proceedings". 2019, p. 1-12.
ISBN978-84-87985-31-7
Altres identificadorshttp://www.sea-acustica.es/fileadmin//INTERNOISE_2019/Fchrs/Proceedings/2030.pdf
Fitxers | Descripció | Mida | Format | Visualitza |
---|---|---|---|---|
2030.pdf | 259,1Kb | Visualitza/Obre |