Abstract:In this paper, noise field tests were carried out in an underground station platform. And a suitable finite element model was established to analyze structure-borne noise induced by the load of a rail transit train through the refined simulation of the station structure. The sound field distribution characteristics of low-frequency structure-borne noise in the station platform space were analyzed. At the same time, acoustic mode was used to reveal the propagation mechanism of low-frequency noise in the station platform. The analysis results indicate that: the low frequency noise in the underground station platform appears an obvious peak at 50 Hz-85 Hz, which is radiated mainly from the vibration of the platform board. The sound pressure level at different locations shows a significant volatility with a fluctuation of 12 dB, and the sound pressure level varies within 68.6 dB-80.4 dB. The sensitive resonant frequency of the platform acoustic cavity has a significant impact on low-frequency structural noise, which will amplify the low-frequency structural noise of the station. Changing the height of station platform is a useful method to improve the station sound environment.
曾钦娥,高亮,侯博文,马超智. 轨道交通地下站台低频结构噪声预测及其传播特性研究[J]. 振动与冲击, 2021, 40(8): 278-285.
ZENG Qin’e, GAO Liang, HOU Bowen, MA Chaozhi. Prediction and propagation characteristics of structure-borne noise of an underground platform in rail transit. JOURNAL OF VIBRATION AND SHOCK, 2021, 40(8): 278-285.
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