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Effect of coupling between passenger compartment and trunk of a car on coupled system natural frequencies using acoustic frequency response function
KTH, School of Engineering Sciences (SCI), Aeronautical and Vehicle Engineering.
Volvo Cars Corporation, Gothenburg Sweden.
KTH, School of Engineering Sciences (SCI), Aeronautical and Vehicle Engineering, MWL Numerical acoustics.ORCID iD: 0000-0003-1855-5437
Department of Architectural Science, Toronto Canada.
2014 (English)In: Applied Acoustics, ISSN 0003-682X, E-ISSN 1872-910X, Vol. 76, 310-318 p.Article in journal (Refereed) Published
Abstract [en]

Conventional numerical techniques, used to study the acoustics of a car passenger cabin, treat the cabin as an isolated cavity excited by the cavity boundaries. Realistically, other cavity volumes such as the trunk communicate with the cabin through the holes in the parcel shelf of the car. An extended acoustic model of a car is formed by the cavity volumes of the passenger compartment and the trunk as well as air leakages through the holes provided for electrical devices and ventilation on the parcel shelf. In this study, the dynamic influence of air leakages between the passenger and trunk compartments on the first and second coupled system modes was investigated experimentally using acoustic frequency response function. The response to the acoustic excitation was measured for four different configurations of trim and holes of the parcel shelf. The natural frequencies of the first and second coupled system modes increased with increasing holes size with and without the trim of the parcel shelf. The experimental results were in good agreement with the reported results of coupling effects of double cavities connected by a neck. In the low frequency region since the wavelength is longer compared to the holes dimension, these holes act as point sources.

Place, publisher, year, edition, pages
2014. Vol. 76, 310-318 p.
Keyword [en]
Coupling, Passenger compartment, Trunk, Coupled system natural frequencies, Acoustic frequency response function
National Category
Engineering and Technology
URN: urn:nbn:se:kth:diva-140117DOI: 10.1016/j.apacoust.2013.08.002ISI: 000328588900033ScopusID: 2-s2.0-84884831427OAI: diva2:689595

QC 20140121. QC 20160212

Available from: 2014-01-21 Created: 2014-01-17 Last updated: 2016-02-12Bibliographically approved

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Seifzadeh, AlirezaGöransson, Peter
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