Interior sound field refinement of a passenger car using modified panel acoustic contribution analysis

Han, Xu; Guo, Yan; Yu, Haidong; Zhu, Pengxiao

doi:10.1007/s12239-009-0010-8

Cited by 18 publications

(11 citation statements)

References 7 publications

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“…The focus of structural modifications or acoustical treatments must be placed on the positive panels since their vibration amplitude directly increases the pressure level at an acoustic field point in the cabin. Its benefits and conveniences have been proven by recent works mainly on commercial vehicles Han et al, 2012;Jahani et al, 2013;Xu et al, 2015;Yuksel et al, 2012]. The optimization of cabin shape may also be considered as proposed by Zhang and Cheng [2015].…”

Section: Finite Element Methods and Boundary Element Methodsmentioning

confidence: 99%

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: Finite Element Methods and Boundary Element Methodsmentioning

confidence: 99%

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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“…After recognition of the regions that contribute most to the interior noise, it is necessary to optimize the panels. Han compared three different conditions to affirm the optimum proposal [20]. Liang used structural topology optimization to modify the panels [21].…”

Section: Introductionmentioning

confidence: 99%

Optimization of Noise Transfer Path Based on the Composite Panel Acoustic and Modal Contribution Analysis

et al. 2021

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The noise of a cab directly affects the comfort and labor efficiency of the operators. The optimization of the structure-borne transmission path can obviously reduce the cab noise. The method of panel acoustic contribution analysis (PACA) is used to reduce structure noise. However, most studies only consider the panel acoustic contribution of a single frequency, without considering the contribution of major frequencies synthesis to confirm the optimized panels. In this paper, a novel method is proposed based on composite panel acoustic and modal contribution analysis and noise transfer path optimization in a vibro-acoustic model. First, the finite element model (FEM) and the acoustic model are established. Based on the acoustic transfer vector (ATV) method, a composite panel acoustic contribution analysis method is proposed to identify the panels affecting the noise of the field point. Combined with the modal acoustic contribution of the modal acoustic transfer vector (MATV) method, the noise field point is confirmed in the area which has the most significant influence. Second, the optimization algorithm NLOPT which is a nonlinear optimization is applied to design the areas. The noise transfer path optimization with vibroacoustic coupling response can quickly determine the optimal thickness of the panels and reduce low-frequency noise. The effectiveness of the proposed method is applied and verified in an excavator cab. The sound pressure level (SPL) the driver’s right ear (DRE) decreased obviously. The acoustic analysis of the composite panel acoustic contribution and modal acoustic contribution can more accurately recognize an optimized area than the traditional PACA. This method can be applied in the optimization of the structure-borne transmission path for construction machinery cab and vehicle body.

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“…Lee et al 10 researched the correlation by measuring the brain waves of drivers according to vehicle sound pressure, and analyzed the correlation between the subjective evaluation and objective evaluation by classifying the evaluators into two groups. Han et al 11 proposed a methodology to change or enhance the interior structure-borne noise of vehicles.…”

Section: Introductionmentioning

confidence: 99%

The influence of noise in vehicles on the driver’s subjective evaluation of driveability

Park

Lee

2017

Proceedings of the Institution of Mechanical Engineers, Part D:

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Driveability, including maneuverability, stability, and riding quality, is one of the most important factors determining the marketability of vehicles. However, unlike fuel economy or engine performance, driveability is very difficult to be evaluated quantitatively. With regard to research on vehicle noise related to driveability, existing works mainly deal with quantification or improvement methods. In this study, the various physical quantities regarding vehicle operating conditions were measured and the noise characteristics were manipulated in several ways to evaluate and analyze the influence of noise on subjective drivability. The results show that the noise level as well as noise frequency characteristics are influencing the drivers' subjective evaluation of driveability.

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Interior sound field refinement of a passenger car using modified panel acoustic contribution analysis

Cited by 18 publications

References 7 publications

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

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

Optimization of Noise Transfer Path Based on the Composite Panel Acoustic and Modal Contribution Analysis

The influence of noise in vehicles on the driver’s subjective evaluation of driveability

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