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Using Magnetic Barkhausen Noise Technology and Finite Element Method to Study the Condition of Continuous Welded Rails on the Darwin-Alice Springs Line

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Journal of Civil Engineering and Architecture 2011年第7期5卷 596-605页

作者： Ralph （Wei） Zhang Helen Wu Thermit Australia Pty Ltd Somersby N.S. W. Australia School of Engineering Edith Cowan University Joondalup 6027 Western Australia

The Magnetic Barkhausen Noise （MBN） technology is a non-destructive method to measure the neutral temperature of thc cwr track. A series of in-field verifications and data comparison on Australian mainline track. have shown the results from that system are highly accurate and reliable. The system can be an accuracy and cost-effective tool to prevent the potential buckling and break of cwr rails. The physical backgrounds and features of the system are represented in this paper. The Darwin-Alice Springs Line is a newly constructed main line in Australia which is linked from the north and middle of Australia. Originally, this rail line is designed and constructed in a ＂cost-effective＂ way to a lower price, and the key parameters are relatively low. To maintain the stability of the cwr track. in a very harsh environment, some new technologies such as the MBN technology were utilised. From the results of neutral temperature, it is found that the majority of them are very high. Combined with the calculation and finite element analysis, these problems evidenced that it is caused by the low toe load fastening system and high sleeper spacing. After that some suggestions are given to improve the stability of the cwr on the railway line.

关键词： Magnetic Barkhausen Noise finite element method condition cwr track.

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