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Title: Active control of Turbulent Boundary Layer sound transmission into a vehicle interior
Authors: Caiazzo, Anna
Alujevic, Neven
Pluymers, Bert
Desmet, Wim
Issue Date: 3-Jul-2016
Publisher: Journal of Physics: Conference Series - IOP Publishing (UK)
Host Document: 13th International Conference on Motion and Vibration Control (MOVIC 2016) joint with the 12th International Conference on Recent Advances in Structural Dynamics. vol:744
Series Title: Journal of Physics: Conference Series. (JPCS)
Conference: MOVIC & RASD 2016 location:Southampton date:3-6 July 2016
Article number: 012026
Abstract: 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. Signicant reductions of the low-frequency
vibrations of the interior panel and the sound pressure in the cavity are observed.
ISSN: 1742-6588
Publication status: published
KU Leuven publication type: IC
Appears in Collections:Production Engineering, Machine Design and Automation (PMA) Section

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