Energy transmission in a mechanically-linked double-wall structure coupled to an acoustic enclosure

Li, Cheng; Li, Y. Y.; Gao, Jianxin

doi:10.1121/1.1886525

Cited by 73 publications

(60 citation statements)

References 17 publications

(16 reference statements)

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“…In order to describe the vibration intensity of the two panels as well as the local distribution of sound pressure, two parameters are introduced below [42]:…”

Section: Mathematic Formulation and Solutionmentioning

confidence: 99%

Transmission of Sound Through Finite Multiple-Panel Partition

Xin

2014

Springer Tracts in Mechanical Engineering

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This chapter is organized as three parts: in the first part, the vibroacoustic performance of a rectangular double-panel partition with enclosed air cavity and simply mounted on an infinite acoustic rigid baffle is investigated analytically. The sound velocity potential method rather than the commonly used cavity modal function method is employed, which possesses good expandability and has significant implications for further vibroacoustic investigations. The simply supported boundary condition is accounted for by using the method of modal function, and double Fourier series solutions are obtained to characterize the vibroacoustic behaviors of the structure. Results for sound transmission loss (STL), panel vibration level, and sound pressure level are presented to explore the physical mechanisms of sound energy penetration across the finite double-panel partition. Specifically, focus is placed upon the influence of several key system parameters on sound transmission, including the thickness of air cavity, structural dimensions, and the elevation angle and azimuth angle of the incidence sound. Further extensions of the sound velocity potential method to typical framed double-panel structures are also proposed.In the second part, the air-borne sound insulation performance of a rectangular double-panel partition clamp mounted on an infinite acoustic rigid baffle is investigated both analytically and experimentally, and compared with that of a simply supported one. With the clamped (or simply supported) boundary accounted for by using the method of modal function, a double series solution for the sound transmission loss (STL) of the structure is obtained by employing the weighted residual (Galerkin) method. Experimental measurements with Al double-panel partitions having air cavity are subsequently carried out to validate the theoretical model for both types of the boundary condition, and good overall agreement is achieved. A consistency check of the two different models (based separately on clamped modal function and simply supported modal function) is performed by

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“…In order to describe the vibration intensity of the two panels as well as the local distribution of sound pressure, two parameters are introduced below [42]:…”

Section: Mathematic Formulation and Solutionmentioning

confidence: 99%

Transmission of Sound Through Finite Multiple-Panel Partition

Xin

2014

Springer Tracts in Mechanical Engineering

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“…Most previous work focused on structures without any mechanical joints between the two walls, in which energy is entirely transmitted through the air gap, forming the acoustic transmitting path. Recently, studies on energy transmission between the two panels connected with mechanical links or connectors have been presented [11][12][13][14][15][16]. For example, Lin et al [11] investigated the transmission of a plane sound wave through two infinite parallel plates connected by identical periodically spaced frames, and also compared the strengths of the two transmission paths (structural path through the studs and the airborne path through the cavity).…”

Section: Introductionmentioning

confidence: 99%

“…In general, a realistic mechanical link conveys energy between the two panels through transverse forces and the moments, which are caused by the translational and rotational effects of the link, respectively. Effects of the translational link on energy transmission have been extensively investigated in [13][14][15][16]. In our previous work [13], the respective effects of the air gap and the links on energy transmission and noise insulation properties have been assessed.…”

Section: Introductionmentioning

confidence: 99%

Energy transmission through a double-wall structure with an acoustic enclosure: Rotational effect of mechanical links

2006

Applied Acoustics

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“…Thus, as presented in works such as [Antonio et al 2003] and [Cheng et al 2005], double panel systems offers improved vibro-acoustic behaviors and can be used in building constructions, medication equipments, automobiles and aeronautical industries. In fact, to calculate the dynamic responses of a fluid-structure coupled problem, some mathematical models can be mixed.…”

Section: Introductionmentioning

confidence: 99%

Edge stiffness effects on thin-film laminated double glazing system dynamical behavior by the operational modal analysis

Akrout¹,

Chaabane²,

Hammami³

et al. 2012

J. Mech. Mater. Struct.

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We apply operational modal analysis (OMA) to determine the eigenfrequencies and the eigenmode shapes of a thin-film laminated double glazing system. For this purpose, the dynamic behaviors of both a laminate alone and a coupled system (double-wall structure) for specific boundary conditions are investigated. Here, the laminated plate which is composed of two elastic skins joined with an adhesive ultra-thin film is bonded by an elastic joint. Thus, two configurations of the thin-film laminated glass plate elastic boundary conditions are considered. The first one assumes that the structure is bonded by a translational stiffness (linear springs). In the second one, besides the translational stiffness, a rotational stiffness (angular springs) is introduced in order to improve the developed model. The modal recombination results of a thin-film laminated glass plate as well as those of the thin-film laminated double glazing system are presented and compared to the estimated modes achieved by OMA. Since a good agreement is obtained, the OMA technique can be used to determine the modal parameters by considering the experimental vibratory responses of the studied system. In addition, the vibration's amplitude of two laminated glass plates linked from edge to edge with both linear and angular springs can be much reduced compared to the one of the same structure bonded only by linear springs.

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Energy transmission in a mechanically-linked double-wall structure coupled to an acoustic enclosure

Cited by 73 publications

References 17 publications

Transmission of Sound Through Finite Multiple-Panel Partition

Transmission of Sound Through Finite Multiple-Panel Partition

Energy transmission through a double-wall structure with an acoustic enclosure: Rotational effect of mechanical links

Edge stiffness effects on thin-film laminated double glazing system dynamical behavior by the operational modal analysis

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