Active control of turbulent boundary layer sound transmission into a vehicle interior

Caiazzo, Anna and Alujević, Neven and Pluymers, Bert and Desmet, Wim (2016) Active control of turbulent boundary layer sound transmission into a vehicle interior. = Active control of turbulent boundary layer sound transmission into a vehicle interior. Journal of Physics: Conference Series, 744 (1). pp. 1-13. ISSN 1742-6596. Vrsta rada: ["eprint_fieldopt_article_type_article" not defined]. . Točan broj autora: 4.

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In high speed automotive, aerospace, and railway transportation, the turbulent boundary layer (TBL) is one of the most important sources of interior noise. The stochastic pressure distribution associated with the turbulence is able to excite significantly structural vibration of vehicle exterior panels. They radiate sound into the vehicle through the interior panels. Therefore, the air flow noise becomes very influential when it comes to the noise vibration and harshness assessment of a vehicle, in particular at low frequencies. Normally, passive solutions, such as sound absorbing materials, are used for reducing the TBL-induced noise transmission into a vehicle interior, which generally improve the structure sound isolation performance. These can achieve excellent isolation performance at higher frequencies, but are unable to deal with the low-frequency interior noise components. In this paper, active control of TBL noise transmission through an acoustically coupled double panel system into a rectangular cavity is examined theoretically. The Corcos model of the TBL pressure distribution is used to model the disturbance. The disturbance is rejected by an active vibration isolation unit reacting between the exterior and the interior panels. Significant reductions of the low-frequency vibrations of the interior panel and the sound pressure in the cavity are observed.

Item Type: Article (["eprint_fieldopt_article_type_article" not defined])
Keywords (Croatian): turbulent boundary layer; Corcos model; active vibroacoustic control; direct velocity feedback; active control of sound transmission; stability of active systems
Subjects: TECHNICAL SCIENCE > Electrical Engineering
TECHNICAL SCIENCE > Mechanical Engineering
TECHNICAL SCIENCE > Aviation, rocket and space technology
Divisions: 600 Department of Naval Engineering and Marine Technology > 620 Chair of Marine Structures Design
Indexed in Web of Science: No
Indexed in Current Contents: No
Citations SCOPUS: 0 (15.12.2017.)
Date Deposited: 20 Mar 2017 14:20
Last Modified: 20 Aug 2018 08:48

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