Development of an optimised, standard-compliant procedure to calculate sound transmission loss: design of transmission rooms

Papadopoulos, Christos I.

doi:10.1016/s0003-682x(02)00005-1

Cited by 22 publications

(16 citation statements)

References 18 publications

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“…The density values ρ of the panel layers were determined experimentally (Smakosz et According to Xenaki (2005), the dynamic elastic properties of expanded polystyrene foams can be estimated as (with E = 2G(1 + ν)): G = 0.32ρ − 1.4 and ν = 0.22 + 0.0033ρ. (19) In steady-state FE analyses, the second-order twodimensional 8-noded quadrilateral elements (AC2D8) with pressure as the degree of freedom were used to simulate an acoustic medium. In transient analyses, the first-order elements (AC2D4R) were chosen.…”

Section: Input Fe Datamentioning

confidence: 99%

“…Gasses with a large difference in the impedance maximized the effective sound insulation of a layered system. An application of the finite element method to different acoustic problems was demonstrated among others by Papadopoulos (2002;2003) Papadopoulos (2002;2003) showed that a three-dimensional numerical model of an acoustic laboratory was a useful tool to calculate the sound insulation of different structures. A three-dimensional model was computationally very expensive and could be mainly used to predict the acoustic structure behaviour in a low-frequency band.…”

Section: Introductionmentioning

confidence: 99%

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Experiments and FE Analyses on Airborne Sound Properties of Composite Structural Insulated Panels

Wawrzynowicz¹,

Krzaczek²,

Tejchman³

2015

Archives of Acoustics

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Airborne acoustic properties of composite structural insulated panels CSIPs composed of fibremagnesium-cement facesheets and expanded polystyrene core were studied. The sound reduction ratings were measured experimentally in an acoustic test laboratory composed of two reverberation chambers. The numerical finite element (FEM) model of an acoustic laboratory available in ABAQUS was used and verified with experimental results. Steady-state and transient FE analyses were performed. The 2D and 3D modelling FE results were compared. Different panel core modifications were numerically tested in order to improve the airborne sound insulation of CSIPs.

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Section: Input Fe Datamentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Experiments and FE Analyses on Airborne Sound Properties of Composite Structural Insulated Panels

Wawrzynowicz¹,

Krzaczek²,

Tejchman³

2015

Archives of Acoustics

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“…Zhou et al analytically estimated the TL characteristics of asymmetric sandwich panels fabricated with orthotropic graphite fiber face sheets and foam-filled honeycomb cores [9]. As for the numerical methods, finite element methods (FEMs) have been used to evaluate the TL characteristics of composite panels at relatively low frequencies (e.g., at the maximum frequency of 2 kHz) [10][11][12]. Ramakrishnan et al estimated the noise reduction of laminated composite plates up to the center frequency of 200 Hz in the 1/3 octave bands [10].…”

Section: Introductionmentioning

confidence: 99%

“…Ramakrishnan et al estimated the noise reduction of laminated composite plates up to the center frequency of 200 Hz in the 1/3 octave bands [10]. Papadopoulos calculated the TL of isotropic panels such as steel, aluminum, and glass panels up to 704 Hz by using HKS ABAQUS [11,12]. Tee et al investigated flexural wave propagation in auxetic tetrachiral honeycomb structures by implementing a Bloch-wave-based FE model and the modal density estimated from the model was compared to the measured model density by using a laser vibrometer [13].…”

Section: Introductionmentioning

confidence: 99%

Identification of Acoustic Characteristics of Honeycomb Sandwich Composite Panels Using Hybrid Analytical/Finite Element Method1

Kim

Han

2013

Journal of Vibration and Acoustics

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For the purpose of identifying the acoustic characteristics of honeycomb sandwich panels, finite element method (FEM), combined with boundary element method (BEM), has been widely used. However, the latter approach is not always applicable to high frequency analyses since it requires a large number of FEM/BEM meshes. In order to reduce computational resources and modeling times, a hybrid analytical/finite element method (HAFEM) is described that uses a finite element approximation in the thickness direction, while analytical solutions are assumed in the plane directions. Thus, it makes it possible to use a small number of finite elements, even for high frequency analyses. By using the HAFEM, the wave transmission, propagation, and radiation characteristics of the honeycomb sandwich panels are investigated. The proposed HAFEM procedure is validated by comparing the predicted transmission loss (TL) results to the measured ones. Through the use of the HAFEM model of a honeycomb sandwich panel, it is shown that the structural responses of the panel converge asymptotically to flexural waves in the low audible frequency region, core shear waves in the high audible to ultrasonic frequency region, and skin flexural waves in the high ultrasonic frequency region. Coincident frequencies occur at the transition region from the flexural to core shear wave behaviors. From the TL sensitivities of various panel design parameters, the most dominant design parameters contributing to the TL results are determined as a function of frequency. In order to improve the acoustic performance of the honeycomb sandwich panel while satisfying weight and strength requirements, a new double core honeycomb sandwich panel is designed to have the same mass per unit area as the baseline single core panel but have a larger equivalent flexural stiffness than that of the baseline panel.

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“…En el campo de la vibroacústica en edificios aún no se aplican estas herramientas con la misma intensidad que en otros campos, como automoción o aeronáutica, ya que no ha alcanzado la madurez que ha conseguido en estos ámbitos (Papadopoulos 2002). El uso del FEM para la simulación del comportamiento acústico de los edificios permite analizar la mayoría de las variables y condiciones de contorno, pudiendo conseguir resultados fiables en ciertas aplicaciones (Papadopoulos 2003;Clasen and Langer 2007;Segovia et al 2012).…”

Section: Antecedentes Y Justificaciónunclassified

Simulación numérica de la transmisión indirecta estructural y de la transmisión del ruido de impactos en edificios

Martín¹

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Development of an optimised, standard-compliant procedure to calculate sound transmission loss: design of transmission rooms

Cited by 22 publications

References 18 publications

Experiments and FE Analyses on Airborne Sound Properties of Composite Structural Insulated Panels

Experiments and FE Analyses on Airborne Sound Properties of Composite Structural Insulated Panels

Identification of Acoustic Characteristics of Honeycomb Sandwich Composite Panels Using Hybrid Analytical/Finite Element Method1

Simulación numérica de la transmisión indirecta estructural y de la transmisión del ruido de impactos en edificios

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