Acoustical influence of stiffeners on acoustic radiation of plates

Moyne, Sylvie Le; Tebec, Jean‐Louis; Tawfiq, Imad

doi:10.1016/s0888-3270(03)00054-2

Cited by 8 publications

(2 citation statements)

References 8 publications

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“…Recently, research into noise energy attenuation and obstruction in the cab has come into focus. Chen et al restrained the sound pressure level (SPL) of internal cab noise by using several measures, including improved structural design, paste damping the design of the acoustic package, and the installation of vibration isolation mass [1][2][3][4][5]. Noise reduction for construction machinery cabs always pays more attention to the reduction of SPL, but research shows that this does not completely reflect human's subjective perception of noise.…”

Section: Introductionmentioning

confidence: 99%

Sound Quality Control Based on CEEMD Blind Source Separation and FELMS Algorithm

2022

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The reduction in sound pressure level is the focus of noise reduction in construction machinery, but the sound quality parameters can better describe the operator’s subjective perception of noise. This paper proposes a sound quality control method for the cab, which is based on complementary ensemble empirical mode decomposition for signal decomposition and reconstruction and an adaptive control algorithm error filter. Firstly, a subjective and objective prediction model was created to identify the target parameters for the sound quality control in the cab. Secondly, the noise was reconstructed based on a complementary ensemble empirical mode decomposition method, thus evaluating the influence of each component on the sound quality and determining the frequency interval. Lastly, the active sound quality control was completed based on the variable step size filter-error least mean square algorithm. The experiments were performed in the cab of a mini-excavator to verify the method’s effectiveness. It was verified that the loudness peak drops by 0.95 sones under stationary idle working conditions. The results demonstrate that the above methods play a guiding role in the actual application of sound quality control for the cab of construction machinery.

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Section: Introductionmentioning

confidence: 99%

Sound Quality Control Based on CEEMD Blind Source Separation and FELMS Algorithm

2022

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“…Some of the most important sound radiation elements include vibrating plate structures. Sound radiation minimization is typically performed via passive methods by adding auxiliary elements to the original structure like masses [1][2][3], adding stiffeners [4][5][6][7], local thickness distribution [8][9][10][11], modifying boundary supports [12][13][14][15], shape modification [16][17][18][19], and/or using material tailoring [20].…”

Section: Introductionmentioning

confidence: 99%

Minimizing the radiated sound power from vibrating plates by using in-plane functionally graded materials

Alshabatat¹,

Naghshineh²

2021

J. vibroeng.

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This paper presents a method for decreasing sound radiation from vibrating plates. The method uses Functionally Graded Materials (FGM) for building the plates instead of isotropic material. The graded pattern of material composition is characterized within the in-plane directions based on a two-dimensional trigonometric law. In the proposed method, the finite element method (FEM) is utilized for estimating the dynamic response of the plates. Then, the Lumped Parameter Model (LPM) is used for calculating sound radiation power. A genetic algorithm is applied as an optimization tool for determining the best distribution of the FGM. The efficacy of the proposed method is demonstrated by three design problems; minimizing the radiated sound from vibrating FGM plate at a particular excitation frequency, over a frequency band, and at a particular natural frequency. The design problems show that a considerable decrease of sound power can be accomplished with the optimal design of FGM plates in comparison with the isotropic plates.

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Research on the Vibration and Noise Reduction of Thin-Walled Planetary Gearbox

Liu

Kang

et al. 2022

Advances in Mechanical Design

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Acoustical influence of stiffeners on acoustic radiation of plates

Cited by 8 publications

References 8 publications

Sound Quality Control Based on CEEMD Blind Source Separation and FELMS Algorithm

Sound Quality Control Based on CEEMD Blind Source Separation and FELMS Algorithm

Minimizing the radiated sound power from vibrating plates by using in-plane functionally graded materials

Research on the Vibration and Noise Reduction of Thin-Walled Planetary Gearbox

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