Optimisation of the structural modes of automotive-type panels using line stiffeners and point masses to achieve weak acoustic radiation

Rousounelos, Andreas; Walsh, Stephen J.; Krylov, Victor V.; Horner, Jane L.

doi:10.1016/j.apacoust.2015.01.001

Cited by 8 publications

(2 citation statements)

References 18 publications

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“…Lightweight structures that combine high structural stiffness, energy absorption [1][2][3] and acoustic performance [4][5][6][7][8] are of interest to automotive, aerospace and the construction sectors. Automotive floor panels [9] and aerospace bulkheads [10] are examples of mechanical structures where the secondary function extends to providing adequate acoustic comfort. Consequently, metallic foam materials are investigated as a potential contender in this aspect due to their favourable mechanical and vibroacoustic properties [11].…”

Section: Introductionmentioning

confidence: 99%

Acoustic Performance of Metallic Foams

Arjunan

Baroutaji

Praveen

et al. 2019

Reference Module in Materials Science and Materials Engineering

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Metallic foams are among the most promising class of materials due to their unique mechanical properties combining low mass with high stiffness, excellent energy absorption, and vibroacoustic damping. Consequently, noise control using methodically engineered metallic foams has received increased attention from both industrial and scientific community. Accordingly, this paper aims to present the mechanism of sound absorption along with the experimental and theoretical procedure that can be used to classify metallic foams. Additionally, the influence of design parameters on the resulting sound absorption coefficient of closed and opencell metallic foams are explored. While aluminium foams used to dominate the literature when it comes to acoustics, recent studies have reported Nickel-Inconel superalloy and Copper foams as having superior sound absorption coefficients.

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Section: Introductionmentioning

confidence: 99%

Acoustic Performance of Metallic Foams

Arjunan

Baroutaji

Praveen

et al. 2019

Reference Module in Materials Science and Materials Engineering

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“…Citarella [18] combined the FEM and BEM approach to study the modal acoustic transfer vector. Rousounelos [19] constructed a weakly radiating structural modes on the panel by placing a number of constraint masses and stiffeners. In the field of transfer path analysis, Li [20] explored the relationship between the transfer path and the control strategies with a fully coupled vibro-acoustic model.…”

mentioning

confidence: 99%

The noise control of minicar body in white based on acoustic panel participation method

Wang¹,

Qin²,

Li³

et al. 2016

J. vibroeng.

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It is very important to predict the acoustic radiation of vehicle body for the control of interior noise. Firstly, the kinetic equations of coupled acoustic-structural finite element method are explained and the numerical analytical methods of noise transfer function and acoustic panel participation are further obtained. Then the coupled acoustic-structural finite element model of body in white and passenger compartment cavity of a minicar is established and verified by modal test. The passive side of engine mounting points are chosen as the excitation points, and driver’s right ear is the output point of sound pressure response. The noise transfer function is calculated and the critical frequency of vehicle interior noise is obtained. The acoustic panel participation analysis of vehicle roof and floor are conducted, and the key acoustic panels are identified. In order to reduce the noise of critical frequency, the measures, pasting damping material and welding beam, are adopted. The results indicate that, compared with the results of structure improvement of modal method, the vehicle interior noise is controlled more effectively by using the acoustic panel participation analytical method.

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