Analysis of acoustic characteristics of the expansion chamber water muffler considering acoustic-structure interaction

Gong, Jiangbin; Xuan, Liang; Peng, Chunmeng

doi:10.3397/1/376724

Cited by 5 publications

(10 citation statements)

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“…The extra peaks are mainly caused by modes of the coupled system. 11 Modal analysis of Case 2 with the open pipe end has been accomplished as shown in Figure 15. It can be observed that modes of test pipes upstream or downstream lead to peaks at 780 Hz, 879 Hz, and 1297 Hz on the TL curve.…”

Section: Resultsmentioning

confidence: 99%

“…For the water muffler, the TL calculation is based on the attenuation of acoustic waves considering effects of flexible test pipes. It is different from the cases in literature, 9–11 where the test pipe is not considered or considered with the rigid wall.…”

Section: Basic Theorymentioning

confidence: 86%

“…Based on this theory, many commercial finite element codes such as Sysnoise 6,12 and Comsol 11 provide the TL prediction of the muffler.…”

Section: Basic Theorymentioning

confidence: 99%

“…8 It is mainly caused by the ignorance of the interaction between the water and the structure. Therefore, considering the acoustic–structure interaction in the simulation process 2,9–11 may improve the accuracy of the predicted result.…”

Section: Introductionmentioning

confidence: 99%

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Numerical analysis of the transmission loss of water muffler according to the two-load method

Gong

Jiang

Xuan

et al. 2020

Proceedings of the Institution of Mechanical Engineers, Part C:

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A numerical method for the transmission loss prediction of the water muffler has been provided according to the measuring process of the two-load method. The commonly used acoustic loads can be applied in the proposed method. The accuracy of the proposed method has been proved by comparing the calculated transmission loss with that from the traditional direct predicting method. And then the proposed method is used to discuss effects of test bench on transmission loss measurement. The predicted transmission loss curves are consistent reasonably based on different test models. The location of monitors relative to the muffler inlet and outlet has little influence on the result. But the distance between the two monitors upstream or downstream should be controlled within a certain range based on the concerning frequency band and the main pipe diameter. It is found that modes of the coupled system consisting of the test pipes and the water cause extra peaks on the transmission loss curve. The influence can be reduced by arranging appropriate fixed points. The proposed method can be used to to explain the reasonability and validity of the test bench design.

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Section: Resultsmentioning

confidence: 99%

Section: Basic Theorymentioning

confidence: 86%

“…Based on this theory, many commercial finite element codes such as Sysnoise 6,12 and Comsol 11 provide the TL prediction of the muffler.…”

Section: Basic Theorymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Numerical analysis of the transmission loss of water muffler according to the two-load method

Gong

Jiang

Xuan

et al. 2020

Proceedings of the Institution of Mechanical Engineers, Part C:

Self Cite

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show abstract

“…Noise control is essential for ships and submarines, where water-filled mufflers are widely used in marine water piping systems to eliminate vibration and noise. The low-frequency sound absorption performance of the expansion muffler needs to be improved, which is limited by the space size in engineering applications [1][2][3][4]. Therefore, the perforated pipe muffler is more widely used because of its smaller flow resistance loss and good sound attenuation [4].…”

Section: Introductionmentioning

confidence: 99%

Acoustic Characteristics Analysis of Liquid-filled Muffler Based on the Structural Acoustic Coupling

Zhou¹,

Fang²

2021

JAMC

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Acoustic-structure coupling effect is an important factor that affects water-filled pipe muffler's acoustic performance. In this paper, finite element method (FEM) was used to study acoustic characteristics of water-filled pipe muffler. Circumferential chamber and perforated pipe walls of the muffler were taken as elastic plates. The effect of acoustic-structure coupling is considered when calculating transmission loss (TL) of water-filled expansion chamber muffler, water mufflers with perforated plate and perforated pipe. In this paper, the effects of the wall thickness and material of the elastic wall and the structural parameters of the perforated plate on the acoustic characteristics of the water muffler are further studied. By comparing the elastic cavity wall of the muffler with the elastic perforated pipe wall, the contribution of both to the acoustic characteristics of the perforated pipe water muffler is obtained.

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Study on the Performance Improvement Mechanisms of Expansion Chamber Water Mufflers with Reacting End Walls

Sun

Wang

et al. 2023

Acoust Aust

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Analysis of acoustic characteristics of the expansion chamber water muffler considering acoustic-structure interaction

Cited by 5 publications

References 0 publications

Numerical analysis of the transmission loss of water muffler according to the two-load method

Numerical analysis of the transmission loss of water muffler according to the two-load method

Acoustic Characteristics Analysis of Liquid-filled Muffler Based on the Structural Acoustic Coupling

Study on the Performance Improvement Mechanisms of Expansion Chamber Water Mufflers with Reacting End Walls

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