期刊
SCIENCE CHINA-TECHNOLOGICAL SCIENCES
卷 56, 期 4, 页码 917-924出版社
SCIENCE PRESS
DOI: 10.1007/s11431-013-5146-0
关键词
bridge-borne noise; train-induced vibration; sound radiation; elevated bridge; numerical simulation; noise reduction
资金
- National Natural Science Foundation of China [50678150, 51008250]
- Program for New Century Excellent Talents in University of China [NCET-10-0701]
- National High Technology Research and Development Program of China (863 Program) [2011AA11A103]
- Specialized Research Fund for the Doctoral Program of Higher Education of China [20110184110020]
Bridge-borne noise pollution caused by train-induced bridge vibration has attracted more and more attentions due to its low-frequency characteristic. In order to investigate the numerical simulation technique of bridge-borne noise and noise reduction methods, a simply supported prestressed concrete (PC) box-girder bridge is adopted for study. Based on train-track-bridge interaction theory, the dynamic response of the bridge under a moving high-speed train is calculated in time-domain and assumed as the sound source of bridge-borne noise. Then bridge-borne noise is estimated according to boundary element method (BEM) in frequency-domain. The time-frequency transform is conducted by fast Fourier transformation (FFT). The validity of the numerical simulation technique is verified through comparison with field measurement results. Furthermore, noise reduction methods are proposed and corresponding effects are discussed. Results show that the proposed numerical simulation method is feasible and accurate in assessing bridge-borne noise. The dominant frequencies of bridge vibration and bridge-borne noise range from 40 Hz to125 Hz and from 31.5 Hz to 100 Hz, respectively. The peak frequency of bridge-borne noise near the bottom plate is 63 Hz. Increasing the thickness of deck plate, adjusting the inclination of webs to 0A degrees-12A degrees, strengthening the boundary constraints and adding a longitudinal clapboard are very effective noise control measures.
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