The vibroacoustic response of a cylindrical shell structure with viscoelastic and poroelastic materials

Boily, Sylvain; Charron, François

doi:10.1016/s0003-682x(98)00070-x

Cited by 23 publications

(19 citation statements)

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“…Supporting this statement, the effectiveness of CLD is evident from literature with it being considered in various transport systems such as ship [Pang et al, 2014], tractor [Cao, 2005], truck [Subramanian et al, 2004], aircraft [Boily and Charron, 1999], and helicopter [Caillet et al, 2012]. Some even attempted to introduce active control system into CLD [Poh et al, 1996].…”

Section: Viscoelastic Damping Treatmentmentioning

confidence: 96%

“…More realistic results are demonstrated in an excavator cabin [Willemsen et al, 2009] and a van [Cherng et al, 2002]. Apart from automobile applications, this solution is also considered in aircraft fuselage [Boily and Charron, 1999] and train cabin [Hu et al, 2014]. Exclusively, active sound absorption material, known as smart foam, is also considered in aircraft fuselage [Gentry et al, 1997;Guigou and Fuller, 1999;Kim et al, 1999].…”

Section: Sound Absorption Materialsmentioning

confidence: 99%

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Acoustic Metamaterials: A Potential for Cabin Noise Control in Automobiles and Armored Vehicles

Ang

Koh²,

Lee

2016

Int. J. Appl. Mechanics

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The aim of this paper is to provide an overview of the existing industrial practices used for cabin noise control in various industries such as automotive, marine, aerospace, and defense. However, emphasis is placed on automobiles and armored vehicles. Generally, automobile cabins usually constitute of thin structural panels, where the fundamental frequency typically falls below 200[Formula: see text]Hz. If a specific structural mode couples with a specific acoustic mode of the cabin, booming noise occurs. As such, discomfort may be felt by the occupants. Fundamentally, vibroacoustics problems may be minimized if the acoustic modes and the structural modes are decoupled, which is achieved usually by structural modifications or acoustical treatments. However, if excessively performed, the weight limitation of an automobile design will be exceeded; not to mention the adverse effect of increased weight on several factors such as fuel efficiency, mileage life of tires and acceleration of the vehicle. Moreover, current solutions have several drawbacks in low frequency noise control. In light of this, it is of great interest to explore the feasibility of acoustic metamaterials as an alternative with hope to improve cabin noise.

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Section: Viscoelastic Damping Treatmentmentioning

confidence: 96%

Section: Sound Absorption Materialsmentioning

confidence: 99%

Acoustic Metamaterials: A Potential for Cabin Noise Control in Automobiles and Armored Vehicles

Ang

Koh²,

Lee

2016

Int. J. Appl. Mechanics

View full text Add to dashboard Cite

show abstract

“…Therefore, decoupling of domains (fluid and structure) is often considered, normal modes of in vacuo structure and rigid walls cavity are classically used for modal reduction. Unfortunately, it has been shown [16] that these reduction strategies have bad convergence properties that can be physically explained by the velocity discontinuity at the fluid-structure interfaces, which have been replaced by rigid walls. Even if an infinite number of modes would be used, the exact solution in terms of velocity could not be achieved.…”

Section: Vibroacoustic Damped Problemmentioning

confidence: 99%

“…Therefore the response can not converge exactly (in terms of velocity) to the accurate solution even if many modes are introduced [16]. To improve the convergence, T f is enriched by static response p s defined by (3).…”

Section: Classical Reduction Using Decoupled Basismentioning

confidence: 99%