Characteristics analysis of the bridge vibration and structure-borne noise when high-speed trains passing by each other

DU Miao1,WANG Kaiyun1,2,GE Xin2,ZHANG Xiaoan1

Journal of Vibration and Shock ›› 2024, Vol. 43 ›› Issue (14) : 122-130.

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PDF(3490 KB)
Journal of Vibration and Shock ›› 2024, Vol. 43 ›› Issue (14) : 122-130.

Characteristics analysis of the bridge vibration and structure-borne noise when high-speed trains passing by each other

  • DU Miao1,WANG Kaiyun1,2,GE Xin2,ZHANG Xiaoan1
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Abstract

The vibration of the bridge is intensified when two high-speed trains pass each other, which affects the radiated noise of the bridge. A structure-borne noise prediction model of the bridge was established based on the vehicle-track coupled dynamics theory, finite element, and boundary element methods. The characteristics and mechanism of vibration and noise of the bridge under single train operation and two trains passing each other were compared, and the panel acoustic contribution was studied. The results showed that both the accelerations and acoustic powers of the bridge under the condition of two trains passing each other were generally larger than those under the single-train operation condition. The sound power variation trends were consistent for both conditions and the dominant frequency band was 30-90Hz. Compared with the single train operation condition, the sound pressure level of areas near the ground increased significantly under the condition of two trains passing each other, and the corresponding sound pressure levels at typical field points under or beside the bridge were larger, with maximum differences of about 4-7dB and 6-9dB, respectively. The noise of field points at 20Hz was below the threshold of hearing, and the loudness levels were about 60~70phon in the frequency range above 63Hz. Besides, the differences of loudness levels were within 10phon under two conditions. Overall, in the dominant frequency band, the panels' acoustic contribution to typical field points when two trains pass each other is generally larger than that when a single train operates. Among them, the left web has the most significant change in the acoustic contribution to the field points under and beside the bridge, with the maximum increase of 10.13dB and 10.27dB respectively.

Key words

High-speed railway / train passing each other / bridge vibration / structure-borne noise / panel acoustic contribution

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DU Miao1,WANG Kaiyun1,2,GE Xin2,ZHANG Xiaoan1. Characteristics analysis of the bridge vibration and structure-borne noise when high-speed trains passing by each other[J]. Journal of Vibration and Shock, 2024, 43(14): 122-130

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