The Effect of the Cavity Damping on Vehicular Evaluation using the Finite Element Method

• Autorzy: Ferreira T. S. , Magalhães P. A. , Moura F. L. , Ferreira T. S.

Identyfikatory

DOI

10.1515/aoa-2016-0009

• Języki publikacji: EN

Abstrakty

EN

This work focuses on finding a numerical solution for vehicle acoustic studies and improving the usefulness of the numerical experimental parameters for the development stage of a new automotive project. Specifically, this research addresses the importance of modal cavity damping for vehicle exerts during numerical studies. It then seeks to suggest standardized parameter values of modal cavity damping in vehicular acoustic studies. The standardized value of modal cavity damping is of great importance for the study of vehicular acoustics in the automotive industry because it would allow the industry to begin studies of the acoustic performance of a new vehicle early in the conception phase with a reliable estimation that would be close to the final value measured in the design phase. It is common for the automotive industry to achieve good levels of numerical-experimental correlation in acoustic studies after the prototyping phase because this phase can be studied with feedback from the simulation and experimental modal parameters. Thus, this research suggests values for modal cavity damping, which are divided into two parts due to their behaviour: ξ(x) = −0.0126(x − 100) + 6.15 as a variable function to analyse up to 100 Hz and 6.15% of modal cavity damping constant for studies between 30 Hz and 100 Hz. The sequence of this study shows how we arrived at these values.

Słowa kluczowe

EN

finite element method; acoustic control; trimmed body; numerical experimental correlation; modal damping

• Wydawca: Instytut Podstawowych Problemów Techniki PAN ; Komitet Akustyki PAN ; Polskie Towarzystwo Akustyczne
• Czasopismo: Archives of Acoustics
• Rocznik: 2016
• Tom: Vol. 41, No. 1
• Strony: 87--97
• Opis fizyczny: Bibliogr. 17 poz., rys., tab., wykr., fot.

Twórcy

autor

Ferreira T. S.

• Department of Mechanical Engineering, Pontifical University Catholic, Av. Dom José Gaspar, 500, Belo Horizonte, Brazil

autor

Magalhães P. A.

• Department of Mechanical Engineering, Pontifical University Catholic, Av. Dom José Gaspar, 500, Belo Horizonte, Brazil

autor

Moura F. L.

• Department of Mechanical Engineering, Federal University of Minas Gerais, Av. Antônio Carlos, 6627 – Pampulha, Belo Horizonte, Brazil

autor

Ferreira T. S.

• Department of Mechanical Engineering, Federal University of Minas Gerais, Av. Antônio Carlos, 6627 – Pampulha, Belo Horizonte, Brazil

Bibliografia

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• 4. Ferreira T.S., Moura F., Magalhões P. (2013), Sensitivity analysis of numerical and experimental comparison by nvh finite element simulation in “trimmed body” to different excitation points of a vehicle in the frequency range until 500 Hz, 22nd International Congress of Mechanical Engineering (COBEM), ISSN 2176-5480, 22, 1842–1849.
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• 14. Performance Standard (2004), Vehicle and Shell – Acoustic/vibration transfer functions analysis, Fiat Auto, N.7 – R0151.
• 15. Pockszevnicki C., Rodrigues E., Ferreira T.S., Barbosa R., Vieira A., Silveira M. (2011), Finite element analysis considering material porosity, SAE Technical Paper 2011-36-0136, DOI: 10.4271/2011-36-0136.
• 16. Rao, Singiresu (2008), Vibrações Mecânicas, 1st ed., Ed: Pearson, Brasil, Sâo Paulo, pp. 82–85.
• 17. Zhang W., Vlahopoulos N., Wu K. (2005), An energy finite element formulation for high-frequency vibration analysis of externally fluid-loaded cylindrical shells with periodic circumferential stiffeners subjected to axisymmetric excitation, Journal of Sound and Vibration, 282, 3–5, 679–700, DOI: 10.1016/j.jsv.2004.03.063.

Uwagi

Opracowanie ze środków MNiSW w ramach umowy 812/P-DUN/2016 na działalność upowszechniającą naukę.