Structural-Acoustic Analysis of Automobile Passenger Compartment

Zhou, Shu Wen; Zhang, Si Qi

doi:10.4028/www.scientific.net/amm.236-237.175

Cited by 3 publications

(3 citation statements)

References 2 publications

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“…In this Subsection, the BEM is developed for the solution of acoustic problems in a domain that is interior to a closed boundary [61,103]. The method has been applied to room acoustics [104][105][106][107][108], the interior of a vehicle [109][110][111], modelling sound in the human lung [112,113] and in biological cells [114].…”

Section: The Interior Acoustic Problemmentioning

confidence: 99%

“…Expansions on the general method can be found in the following works and the references therein [183,267,[280][281][282][283]. Applications include the interaction of plates with fluids [23,245,284], sandwich panels/lightweight structures [257,[261][262][263]285], sound insulation [283], screens [286], the passenger compartment of an automobile [111], hydrophones [284,287] and in seismo-acoustics [288].…”

Section: Coupled Fluid-structure Interactionmentioning

confidence: 99%

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The Boundary Element Method in Acoustics: A Survey

Kirkup

2019

Applied Sciences

102

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The boundary element method (BEM) in the context of acoustics or Helmholtz problems is reviewed in this paper. The basis of the BEM is initially developed for Laplace’s equation. The boundary integral equation formulations for the standard interior and exterior acoustic problems are stated and the boundary element methods are derived through collocation. It is shown how interior modal analysis can be carried out via the boundary element method. Further extensions in the BEM in acoustics are also reviewed, including half-space problems and modelling the acoustic field surrounding thin screens. Current research in linking the boundary element method to other methods in order to solve coupled vibro-acoustic and aero-acoustic problems and methods for solving inverse problems via the BEM are surveyed. Applications of the BEM in each area of acoustics are referenced. The computational complexity of the problem is considered and methods for improving its general efficiency are reviewed. The significant maintenance issues of the standard exterior acoustic solution are considered, in particular the weighting parameter in combined formulations such as Burton and Miller’s equation. The commonality of the integral operators across formulations and hence the potential for development of a software library approach is emphasised.

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Section: The Interior Acoustic Problemmentioning

confidence: 99%

Section: Coupled Fluid-structure Interactionmentioning

confidence: 99%

The Boundary Element Method in Acoustics: A Survey

Kirkup

2019

Applied Sciences

102

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“…As BEM is based on the discretization of boundaries, therefore the acoustics problems can largely be divided into two major categories: (a) Exterior boundary problems and (b) interior boundary problems. The interior boundary problems include applications such as room acoustics, 36,37 automobile acoustics 38 and internal body organs. 39 The exterior boundary problems have received more attention due to its capability of solving infinite domain by discretising only the exterior boundary and resulting application to a wider domain of acoustics problems, which is also the focal point of this paper.…”

Section: Development Of Bem3dmentioning

confidence: 99%

Development of 3D boundary element method for the simulation of acoustic metamaterials/metasurfaces in mean flow for aerospace applications

Bashir

Carley

2020

International Journal of Aeroacoustics

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Low-cost airlines have significantly increased air transport, thus an increase in aviation noise. Therefore, predicting aircraft noise is an important component for designing an aircraft to reduce its impact on environmental noise along with the cost of testing and certification. The aim of this work is to develop a three-dimensional Boundary Element Method (BEM), which can predict the sound propagation and scattering over metamaterials and metasurfaces in mean flow. A methodology for the implementation of metamaterials and metasurfaces in BEM as an impedance patch is presented here. A three-dimensional BEM named as BEM3D has been developed to solve the aero-acoustics problems, which incorporates the Fast Multipole Method to solve large scale acoustics problems, Taylor’s transformation to account for uniform and non-uniform mean flow, impedance and non-local boundary conditions for the implementation of metamaterials. To validate BEM3D, the predictions have been benchmarked against the Finite Element Method (FEM) simulations and experimental data. It has been concluded that for no flow case BEM3D gives identical acoustics potential values against benchmarked FEM (COMSOL) predictions. For Mach number of 0.1, the BEM3D and FEM (COMSOL) predictions show small differences. The difference between BEM3D and FEM (COMSOL) predictions increases further for higher Mach number of 0.2 and 0.3. The increase in difference with Mach number is because Taylor’s Transformation gives an approximate solution for the boundary integral equation. Nevertheless, it has been concluded that Taylor’s transformation gives reasonable predictions for low Mach number of up to 0.3. BEM3D predictions have been validated against experimental data on a flat plate and a duct. Very good agreement has been found between the measured data and BEM3D predictions for sound propagation without and with the mean flow at low Mach number.

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Measurement and analysis of acoustic phenomena occurring in public transport buses based on surveys and field study

Orczyk

Tomaszewski

2021

IOP Conf. Ser.: Earth Environ. Sci.

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The article presents results and analysis of noise measurements in passenger compartments of public transport buses. Ten Solaris Urbino 12 m buses were selected for performing the measurements, including five buses with an automatic 4-speed transmission and five with a 6-speed transmission. The research related to the assessment of the acoustic climate in buses was conducted in two stages: in the first stage surveys were carried out, which were then followed by field study in the second stage. The aim of the performed research was to identify places inside the bus with potentially high sound levels and then a real assessment of the noise affecting passengers. The survey aimed at the assessment of vibroacoustic comfort in buses while driving. The questions answered by the respondents concerned places inside the vehicle and vehicle movement phases, during which noise and vibration are the strongest. Additionally, the respondents made a subjective assessment of noise and vibration inside the bus while driving. The filed study was conducted with 10 measuring microphones placed in the passenger compartment of the bus and consisted in simultaneous recording of sound levels and the speed at which the bus moved. The study was carried out at a standstill and while driving. The conducted measurements allowed the identification of the highest and lowest sound levels in the vehicle at a standstill and while driving.

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Structural-Acoustic Analysis of Automobile Passenger Compartment

Cited by 3 publications

References 2 publications

The Boundary Element Method in Acoustics: A Survey

The Boundary Element Method in Acoustics: A Survey

Development of 3D boundary element method for the simulation of acoustic metamaterials/metasurfaces in mean flow for aerospace applications

Measurement and analysis of acoustic phenomena occurring in public transport buses based on surveys and field study

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