Numerical Method for Predicting the Sound Reduction Index of a Double Panel Including an Active Control System and Porous Material

Sitel, Azzedine; Guigou‐Carter, Catherine; Jean, Philippe

doi:10.3813/aaa.918437

Cited by 2 publications

(2 citation statements)

References 6 publications

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“…A numerical technique was used by Sitel et al. [386] to determine the SRI factor of a double-wall structure containing an active control system as well as a poroelastic layer inside the structure. The simulation principle was developed according to the decoupled Green method.…”

Section: Vibroacoustic Improvementmentioning

confidence: 99%

Prediction of acoustic wave transmission features of the multilayered plate constructions: A review

Zarastvand

Ghassabi

Talebitooti

2021

Jnl of Sandwich Structures & Materials

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This study collects all of the existent papers in the field of acoustic transmission across multilayered plate constructions. Herewith, a comprehensive source is proposed wherein approximately 410 references are reviewed and described from the first [Formula: see text] to [Formula: see text]. In the first part, in addition to the presentation of a complete explanation about the importance of the acoustic analysis of these structures, appropriate formulations are also provided. Furthermore, an overview of the thematic correspondent is carried out. Since the type of material used in these constructions can be very important in sound insulation, the significance of this subject is remarked. The papers are then classified based on their acoustic excitation fields containing plane wave, diffuse, random, and point source. After analyzing the research approaches according to different environmental properties, the articles are ordered based on their boundaries as finite and infinite. To present reliable outcomes, it is necessary to investigate a proper theory proportional to the structure’s thickness. Herewith, this issue is also discussed in detail. The review is also expanded to focus on the different vibroacoustic solutions. Before concluding remarks, the authors' research works are presented wherein either optimization algorithms or control techniques improve the acoustic performance of these structures.

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Section: Vibroacoustic Improvementmentioning

confidence: 99%

Prediction of acoustic wave transmission features of the multilayered plate constructions: A review

Zarastvand

Ghassabi

Talebitooti

2021

Jnl of Sandwich Structures & Materials

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“…ANC is a widely known approach for the active reduction of noise levels. A lot of theoretical and experimental studies for ANC in cavities (see for example [6]) and double wall cavities [7] have been conducted. Even a very complex load master area of the Airbus A400M has been controlled with an ANC system [8] and Cabell et.…”

Section: Introductionmentioning

confidence: 99%

Active control of counter-rotating open rotor interior noise in a Dornier 728 experimental aircraft

Haase

Unruh

Algermissen

et al. 2016

Journal of Sound and Vibration

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The fuel consumption of future civil aircraft needs to be reduced because of the CO 2 restrictions declared by the European Union. A consequent lightweight design and a new engine concept called counter-rotating open rotor (CROR) are seen as key technologies in the attempt to reach this ambitious goals. Bearing in mind that CROR engines emit very high sound pressures at low frequencies and that lightweight structures have a poor transmission loss in the lower frequency range, these key technologies raise new questions in regard to acoustic passenger comfort. One of the promising solutions for the reduction of sound pressure levels inside the aircraft cabin are active sound and vibration systems. So far, active concepts have rarely been investigated for a CROR pressure excitation on complex airframe structures. Hence, the preliminary study presented in this paper shows how an active control system can influence the sound radiation of a complex airframe structure under a CROR pressure excitation and also addresses the open questions on the way towards its realisation. In this phase, an active feedforward control system is investigated in a fully equipped Dornier 728 experimental prototype aircraft. In particular, the sound transmission through

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Numerical Method for Predicting the Sound Reduction Index of a Double Panel Including an Active Control System and Porous Material

Cited by 2 publications

References 6 publications

Prediction of acoustic wave transmission features of the multilayered plate constructions: A review

Prediction of acoustic wave transmission features of the multilayered plate constructions: A review

Active control of counter-rotating open rotor interior noise in a Dornier 728 experimental aircraft

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