Mathematical Logarithmic Model for Predicting Noise of Simply-Supported PC-Box Girder in High-Speed Railway

Abstract:

When a train runs across a bridge, vibration energy is transmitted from the track structure into the bridge deck and other components which act as different size of ‘sounding boards’. These ‘sounding boards’ also radiate noise, namely, re-radiated noise, which results in ‘hot spots’ in noise maps for bridge sections. Based on the field tests on the noise of 32m double line simply-supported PC-box girder serviced in Chengdu-Dujiangyan High-speed Railway (CDHR) in China, mathematical logarithmic equation for predicting the equivalent A-weighed noise level (LA,eq) is proposed. Predicted results are compared with field ones and the non-parametric tests including two-related samples Wilcoxon and two-independent samples Kolmogorov–Smirnov are carried out, indicating satisfactory results and verifying the reliability of theoretical model. Analysis shows that equivalent A-weighed noise level detects no significant difference between the model predictions and the field measurements at the confidence level of 95%.

• Periodical: Applied Mechanics and Materials (Volumes 204-208)
• Pages: 1870-1874
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.204-208.1870
• Online since: October 2012
• Authors: Xiao Zhen Li, Jin Feng Wu, Xun Zhang, Quan Min Liu, Zhi Jun Zhang
• Keywords: CDHR, Equivalent A-Weighed Noise Level, Mathematical Logarithmic Model, Noise, PC Box Girder

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