Random vibro-acoustic control of internal noise through optimized Tuned Mass Dampers. (1st September 2019)

• Record Type: Journal Article
• Authors: Mrabet, E.; Ichchou, M.N.; Bouhaddi, N.
• Is Part Of: Mechanical systems and signal processing. Volume 130(2019)
• Page Start: 17
• Page End: 40
• Publication Date: 2019-09-01
• Subjects: Interior noise control -- Stochastic acoustic optimization -- Root mean square acoustic pressure -- Multiple tuned mass damper -- Multimodal control of interior sound; Structural dynamics -- Periodicals; Vibration -- Periodicals; Constructions -- Dynamique -- Périodiques; Vibration -- Périodiques; Structural dynamics; Vibration; Periodicals; 621
• DOI: 10.1016/j.ymssp.2019.04.062
• Languages: English
• ISSNs: 0888-3270

Abstract

Highlights: Tuned Mass Dampers are used to control random interior sound. A stochastic acoustic optimization strategy is proposed. Multi-objective optimization is used along with multiple TMDs. The optimization strategy is able to handle multimodal control of interior sound. Abstract: The present work deals with the passive control of interior sound pressure induced by randomly vibrating structure coupled to an enclosure filled with air. The control in the low frequency range is achieved using a Tuned Mass Damper (TMD) device. In order to guarantee an optimal performance of the TMD device, a stochastic acoustic optimization strategy is proposed. In the later, the objective function is the root mean square acoustic pressure measured at a given location inside the cavity. Assuming linear behavior of the vibro-acoustic system, the modal interaction approach is used and the objective function is evaluated by means of spectral analysis. The effectiveness of the proposed strategy is investigated and compared with others from the open literature. The capability of the proposed optimization strategy to deal with multimodal control of interior sound has also been addressed. To this end, multiple TMDs have been used. The optimal TMD parameters have been obtained using a multi-objective optimization approach and the results that have been gathered show significant attenuations in all target resonant modes.