Control of low-frequency noise for piping systems via the design of coupled band gap of acoustic metamaterials

Li, Yanfei; Shen, Huiyong; Zhang, Linke; Su, Yongsheng; Yu, Dianlong

doi:10.1016/j.physleta.2016.05.017

Cited by 26 publications

(16 citation statements)

References 28 publications

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“…Volume speed Q is the product of acoustic speed v and cross-sectional area of pipe S p . Thus, acoustic states at the two ends of a uniform pipe section with length of l a (e.g., the uniform pipe section between the (n−1)th and the nth periodic pipe cells as sketched in Figure 1) has the following transfer matrix relation [1,17]:…”

Section: Acoustic Equations and Calculation Methodsmentioning

confidence: 99%

“…The topic of low-frequency acoustic waves transmitting in seawater piping systems in ocean surface ships and under-water vehicles, of which their outlets are underneath the water surface, etc., is of special interest [1,2]. The seawater pipe is an excellent medium that can carry acoustic waves, especially the low-frequency sounds, to a distance far way and almost without energy loss.…”

Section: Introductionmentioning

confidence: 99%

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Transmission of Low-Frequency Acoustic Waves in Seawater Piping Systems with Periodical and Adjustable Helmholtz Resonator

Liu

Yang

2017

JMSE

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Abstract:The characteristics of acoustic wave transmitting in a metamaterial-type seawater piping system are studied. The metamaterial pipe, which consists of a uniform pipe with air-water chamber Helmholtz resonators (HRs) mounted periodically along its axial direction, could generate a wide band gap in the low-frequency range, rendering the propagation of low-frequency acoustic waves in the piping system dampened spatially. Increasing the air volume in the Helmholtz chamber would result in a sharply decrease in the central frequency of the resonant gap and an extension in the bandwidth in the beginning, yet very slowly as the air volume is further augmented. Acoustic waves will experience a small amount of energy loss if the acoustic-structure interaction effect is considered. Also, the structure-borne sound will be induced because of the interaction effects. High pressure loadings on the system may bring in a shrink in the band gap; nevertheless, the features of broad band gaps of the system is still be maintained.

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Section: Acoustic Equations and Calculation Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Transmission of Low-Frequency Acoustic Waves in Seawater Piping Systems with Periodical and Adjustable Helmholtz Resonator

Liu

Yang

2017

JMSE

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“…Yu et al. (2011) and Li et al. (2016) introduced the phononic crystal theory into the design of piping systems and achieved vibration reduction based on band gap characteristics.…”

Section: Introductionmentioning

confidence: 99%

Elastic wave propagation characteristics of periodic track structure in high-speed railway

Wang

Yan

Zhao

et al. 2018

Journal of Vibration and Control

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Wave propagation in the ordered and randomly disordered periodic track structure in high-speed railways are investigated theoretically and experimentally. Taking the CRTS-I double-block ballastless track structure in China as the research object, a theoretical model of periodic track structure is established. The rail is modelled as a Timoshenko beam considering the bending–torsional coupling. The dispersion curves of the periodic track structure are obtained according to the transfer matrix method and Bloch theory. Based on the Lyapunov exponent algorithm, the elastic wave propagation characteristics of the randomly disordered periodic track structure are further calculated and analyzed considering the random disorder of structure parameters. The obtained results show that the periodic track structure is characterized by band gaps, elastic wave propagation attenuates significantly within the band gap, and random disorder in the track structure can expand the attenuation regions. Finally, the band gap characteristics of the vertical/lateral flexural wave and torsional wave are verified respectively through an in situ experiment.

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“…To obtain a broader noise attenuation band, combining several resonators in line is a possible way. Numerous studies have been conducted following this idea using two methods [12][13][14][15][16][17][18][19][20] . One uses a serial arrangement of resonators with different resonance frequencies to obtain a wide band of noise control in ducts.…”

Section: Introductionmentioning

confidence: 99%

The Improvement on Noise Attenuation Performance of a Duct-resonator System

Zhang

2017

Journal of Asian Architecture and Building Engineering

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The Helmholtz resonator (hereafter resonator) is qualified as a silencer with a narrow noise attenuation band at its designed resonance frequency. Combining several resonators in line is a possible way to produce a broader noise attenuation band. This paper focuses on improving the noise attenuation performance of a ductresonator system at low frequency. Two types of periodic duct-resonator system are analyzed theoretically and numerically: a duct-resonator system with identical resonators and a modified duct-resonator system with periodic two-resonator arrays. The planar wave theory and the transfer matrix method are used to investigate wave propagation in the duct-resonator system. The theoretical prediction results yield satisfactory agreement with the Finite Element Method simulation results. The results indicate that both the periodic duct-resonator system and the modified duct-resonator system can broaden the noise attenuation band. Furthermore, the proposed modified duct-resonator system in this paper contributes to a relatively broader noise attenuation band than the periodic duct-resonator system. The modified duct-resonator system provides a useful method for the design of such a system, in order to obtain a relatively broadband noise attenuation.

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Control of low-frequency noise for piping systems via the design of coupled band gap of acoustic metamaterials

Cited by 26 publications

References 28 publications

Transmission of Low-Frequency Acoustic Waves in Seawater Piping Systems with Periodical and Adjustable Helmholtz Resonator

Transmission of Low-Frequency Acoustic Waves in Seawater Piping Systems with Periodical and Adjustable Helmholtz Resonator

Elastic wave propagation characteristics of periodic track structure in high-speed railway

The Improvement on Noise Attenuation Performance of a Duct-resonator System

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