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Experimental assessment of the structure-borne noise in an aircraft cabin due to vibrating equipment

Doutres, Olivier et Caron L'Ecuyer, Alexis et Kathirchelvan, Thineshan et Etchessahar, Manuel. 2015. « Experimental assessment of the structure-borne noise in an aircraft cabin due to vibrating equipment ». In INTER-NOISE and NOISE-CON Congress and Conference Proceedings, InterNoise15 (San Francisco, CA, USA, Aug. 9-12, 2015), p. 4790-4801. INCE-USA.

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Résumé

The structure-borne noise due to vibrating equipment (e.g., hydraulic pump, transformer rectifier unit, power transfer unit, avionic fan, etc.) could be a significant noise source inside commercial and business aircraft cabins. Thus, it is important to specify proper noise requirements for equipment suppliers. However, this is not as straightforward as it seems since the structure-borne noise generated by the equipment is not only dependent on the vibrating equipment but also on the dynamical behavior of the aircraft structure to which it is attached. This work investigates the potential of a well-known experimental procedure for predicting the noise generated in the cabin using characteristic properties of the vibration source and the receiving structure. The source is characterized by its structural mobility and free velocity. The receiving structure is characterized by its structural mobility and the transfer function between the applied force at the connection points and the acoustic pressure generated inside the cabin. The proposed method is validated from a small scale laboratory setup comprising of an avionic fan mounted onto an aluminum structure which is then coupled with a small reverberant chamber.

Type de document: Compte rendu de conférence
Professeur:
Professeur
Doutres, Olivier
Affiliation: Génie mécanique
Date de dépôt: 22 sept. 2015 15:50
Dernière modification: 03 août 2017 14:54
URI: http://espace2.etsmtl.ca/id/eprint/11321

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