Mechanism of noise reduction caused by thickening top plate for high-speed railway box-girder bridge

Zhang, Xiaoan; Zhang, Xiaoyun; Yang, Jianjin; Zhu, Shengyang; He, Qinglie

doi:10.1016/j.istruc.2023.105148

Cited by 4 publications

(2 citation statements)

References 27 publications

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“…where k represents the wave number of the sound wave. For acoustic problems in general bounded spaces without distributed source terms, Equation ( 5) has the following Helmholtz solution, which represents the sound pressure of the point s in the sound field, with the integral form of [8], as follows…”

Section: The Bridge Bem Modelmentioning

confidence: 99%

“…With computer technology advancing, simulation methods were introduced to bridge radiation noise studies. Zhang et al [7,8] analyzed the bridge radiation noise in the low-frequency range based on a detailed train-track-bridge dynamic model, which is revealed to be affected by resonance characteristics, modal acoustical radiation efficiency, and severe vibration. Li et al [9] studied the structure-borne noise characteristics of a steel-concrete bridge with a statistical energy analysis (SEA)-based model and field tests, and the results indicated that the noise from the web of steel longitudinal girder was dominant in the frequency range above 315 Hz, and the corresponding frequency range for the concrete deck was between 80 and 160 Hz.…”

Section: Introductionmentioning

confidence: 99%

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Bridge-Borne Noise Induced by High-Speed Freight Electric Multiple Units: Characteristics, Mechanisms and Control Measures

Du,

Wang,

et al. 2024

Applied Sciences

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The high-speed freight electric multiple unit (EMU) is one of the important development directions for railway freight transportation. To investigate the bridge radiation noise induced by the freight EMU, a noise prediction model consisting of the containers–vehicle–track–bridge dynamic model, finite element model, and boundary element model are established and validated. Through simulation, the bridge radiation noise under different train loading conditions is compared, and the noise radiation mechanism is revealed. Moreover, the noise reduction effect of the noise wall is studied, and the influences of noise wall heights and sound absorption materials are investigated. Results indicate that the bridge sound power and the sound pressure levels (SPLs) of near-field points increase slightly with train loads in the frequency range below 20 Hz and above 125 Hz, with a maximum increase of about 6.8 dB. The structure resonance, intense local vibration, and high acoustic radiation efficiency cause strong bridge radiation noise. The noise wall can realize a good overall noise reduction effect in the sound shadow zone; nevertheless, SPLs increased in areas between the bridge and the noise wall. The ground reflection affects the superposition of transmitted, reflected, and diffracted sound waves, which causes nonlinear relationships of noise reduction effects with the noise wall height. From the perspective of human hearing sensitivity, the loudness levels of typical field points increase with the frequency in the range of 20~80 Hz, and SPLs below 25 Hz are less than the threshold of hearing. Setting the noise wall can effectively reduce the loudness levels, and the reduction effect increases with the noise wall height.

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Section: The Bridge Bem Modelmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Bridge-Borne Noise Induced by High-Speed Freight Electric Multiple Units: Characteristics, Mechanisms and Control Measures

Du,

Wang,

et al. 2024

Applied Sciences

Self Cite

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Noise reduction mechanism of high-speed railway box-girder bridges installed with MTMDs on top plate

Zhang,

Yang

et al. 2024

Railw. Eng. Sci.

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The issue of low-frequency structural noise radiated from high-speed railway (HSR) box-girder bridges (BGBs) is a significant challenge worldwide. Although it is known that vibrations in BGBs caused by moving trains can be reduced by installing multiple tuned mass dampers (MTMDs) on the top plate, there is limited research on the noise reduction achieved by this method. This study aims to investigate the noise reduction mechanism of BGBs installed with MTMDs on the top plate. A sound radiation prediction model for the BGB installed with MTMDs is developed, based on the vehicle–track–bridge coupled dynamics and acoustics boundary element method. After being verified by field tested results, the prediction model is employed to study the reduction of vibration and noise of BGBs caused by the MTMDs. It is found that installing MTMDs on top plate can significantly affect the vibration distribution and sound radiation law of BGBs. However, its impact on the sound radiation caused by vibrations dominated by the global modes of BGBs is minimal. The noise reduction achieved by MTMDs is mainly through changing the acoustic radiation contributions of each plate of the bridge. In the lower frequency range, the noise reduction of BGB caused by MTMDs can be more effective if the installation of MTMDs can modify the vibration frequency and distribution of the BGB to avoid the influence of small vibrations and disperse the sound radiation from each plate.

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Temperature effects on noise radiated by concrete railway structures

Zhou,

Zhang,

Luo

2024

International Journal of Mechanical Sciences

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Mechanism of noise reduction caused by thickening top plate for high-speed railway box-girder bridge

Cited by 4 publications

References 27 publications

Bridge-Borne Noise Induced by High-Speed Freight Electric Multiple Units: Characteristics, Mechanisms and Control Measures

Bridge-Borne Noise Induced by High-Speed Freight Electric Multiple Units: Characteristics, Mechanisms and Control Measures

Noise reduction mechanism of high-speed railway box-girder bridges installed with MTMDs on top plate

Temperature effects on noise radiated by concrete railway structures

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