Research on the Peaks of Elevated Box Bridge Structure Noise of High Speed Railway

Zhang, Xiaoan; Shi, Guozhen; Zhang, Xiaoyun; Yang, Jianjin; Xu, Lei

doi:10.1061/9780784481257.042

Cited by 1 publication

(2 citation statements)

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“…As such, the vibrational energy generated by wheel-rail interaction is first transferred to the point of contact between the rail and the bridge deck. According to the requirements of the specific project, local thickening can be applied to the point of contact of the BGB and the rail to reduce the radiation noise of the BGB [25]. This design solution not only reduces the weight of the bridge, but also reduces costs by using prefabricated bridge components, compared to the process of thickening the top plate of the BGB.…”

Section: Two Kinds Of Top Plate Thickening Low-acoustic Radiation Bri...mentioning

confidence: 99%

“…The most common noise-reducing bridge designs can be broadly divided into the following cases. First, the thickening of various parts of the bridge can achieve good results in both vibration and noise reduction [21][22][23][24][25]; however, the theoretical basis for the selection of the optimal thickness of each part is lacking. Second, installing tuned mass dampers (TMDs) or multi-tuned mass dampers (MTMDs) with enhanced robustness on bridges can effectively attenuate the vibration problems encountered in BGBs [26][27][28][29][30], and thus many scholars have conducted noise control studies related to this issue [31,32].…”

Section: Introductionmentioning

confidence: 99%

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Key Mechanism Research of Top Plate Thickening of the Box-Girder Bridge for Noise Reduction Design in High-Speed Railway

Zhang

Gao

et al. 2023

Applied Sciences

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In the context of noise reduction schemes for box-girder bridges (BGBs) used in high-speed railway, the thickened top plate design can effectively reduce the structural noise of the BGB, which has been widely recognized. However, it is difficult to obtain the optimum thickness of the top plate of the BGB without mastering the key mechanism of the noise reduction scheme. Therefore, this study took a 32 m simple-supported concrete BGB in the context of a high-speed railway as the research object and analyzed and compared the sound vibration characteristics of the entire thickened top plate versus the locally thickened top plate on BGB tracks, and the optimal noise reduction mechanism of the thickened top plate design scheme was studied in detail. The key issues of the thickened top plate noise reduction scheme are discussed. The results show that thickening the top plate can obviously reduce the bridge’s structural noise when subjected to severe vibration and high frequency bands because the vibration of the BGB is reduced. However, in the low frequency band, acoustic radiation can occur as a result of the small amplitude vibration, and this phenomenon is closely related to the vibrational distribution of the BGB. Therefore, it is necessary to focus on the vibrational distribution of the BGB as a priority when carrying out noise reduction using a thickened top plate. This paper points out the most significant factors affecting the acoustic radiation ability of the BGB in different frequency bands, especially the key problem of the strong acoustic radiation ability caused by small vibrations in low frequency band. The research results can provide an important theoretical basis for the optimal thickness design of the BGB.

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Section: Two Kinds Of Top Plate Thickening Low-acoustic Radiation Bri...mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Key Mechanism Research of Top Plate Thickening of the Box-Girder Bridge for Noise Reduction Design in High-Speed Railway

Zhang

Gao

et al. 2023

Applied Sciences

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Research on the Peaks of Elevated Box Bridge Structure Noise of High Speed Railway

Cited by 1 publication

References 2 publications

Key Mechanism Research of Top Plate Thickening of the Box-Girder Bridge for Noise Reduction Design in High-Speed Railway

Key Mechanism Research of Top Plate Thickening of the Box-Girder Bridge for Noise Reduction Design in High-Speed Railway

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