Please wait a minute...
Journal of Zhejiang University-SCIENCE A (Applied Physics & Engineering)  2011, Vol. 12 Issue (12): 885-894    DOI: 10.1631/jzus.A11GT012
Infrastructure Engineering     
A 2.5D finite element approach for predicting ground vibrations generated by vertical track irregularities
Xue-cheng Bian, Chang Chao, Wan-feng Jin, Yun-min Chen
MOE Key Laboratory of Soft Soils and Geoenvironmental Engineering, Department of Civil Engineering, Zhejiang University, Hangzhou 310058, China
Download:     PDF (0 KB)     
Export: BibTeX | EndNote (RIS)      

Abstract  Dynamic responses of track structure and wave propagation in nearby ground vibration become significant when train operates on high speeds. A train-track-ground dynamic interaction analysis model based on the 2.5D finite element method is developed for the prediction of ground vibrations due to vertical track irregularities. The one-quarter car model is used to represent the train as lumped masses connected by springs. The embankment and the underlying ground are modeled by the 2.5D finite element approach to improve the computation efficiency. The Fourier transform is applied in the direction of train’s movement to express the wave motion with a wave-number. The one-quarter car model is coupled into the global stiffness matrix describing the track-ground dynamic system with the displacement compatibility condition at the wheel-rail interface, including the irregularities on the track surface. Dynamic responses of the track and ground due to train’s moving loads are obtained in the wave-number domain by solving the governing equation, using a conventional finite element procedure. The amplitude and wavelength are identified as two major parameters describing track irregularities. The irregularity amplitude has a direct impact on the vertical response for low-speed trains, both for short wavelength and long wavelength irregularities. Track irregularity with shorter wavelength can generate stronger track vibration both for low-speed and high-speed cases. For low-speed case, vibrations induced by track irregularities dominate far field responses. For high-speed case, the wavelength of track irregularities has very little effect on ground vibration at distances far from track center, and train’s wheel axle weights becomes dominant.

Key wordsHigh-speed railway      2.5D finite element method      One-quarter car model      Ground vibration      Track irregularities     
Received: 23 September 2011      Published: 01 December 2011
CLC:  U213.1  
Cite this article:

Xue-cheng Bian, Chang Chao, Wan-feng Jin, Yun-min Chen. A 2.5D finite element approach for predicting ground vibrations generated by vertical track irregularities. Journal of Zhejiang University-SCIENCE A (Applied Physics & Engineering), 2011, 12(12): 885-894.

URL:

http://www.zjujournals.com/xueshu/zjus-a/10.1631/jzus.A11GT012     OR     http://www.zjujournals.com/xueshu/zjus-a/Y2011/V12/I12/885

[1] Jian Han, Guo-tang Zhao, Xin-biao Xiao, Ze-feng Wen, Qing-hua Guan, Xue-song Jin. Effect of softening of cement asphalt mortar on vehicle operation safety and track dynamics[J]. Journal of Zhejiang University-SCIENCE A (Applied Physics & Engineering), 2015, 16(12): 976-986.
[2] Satoru Sone. Comparison of the technologies of the Japanese Shinkansen and Chinese High-speed Railways[J]. Journal of Zhejiang University-SCIENCE A (Applied Physics & Engineering), 2015, 16(10): 769-780.
[3] Xin-biao Xiao, Liang Ling, Jia-yang Xiong, Li Zhou, Xue-song Jin. Study on the safety of operating high-speed railway vehicles subjected to crosswinds[J]. Journal of Zhejiang University-SCIENCE A (Applied Physics & Engineering), 2014, 15(9): 694-710.
[4] Shuo-qiao Zhong, Jia-yang Xiong, Xin-biao Xiao, Ze-feng Wen, Xue-song Jin. Effect of the first two wheelset bending modes on wheel-rail contact behavior[J]. Journal of Zhejiang University-SCIENCE A (Applied Physics & Engineering), 2014, 15(12): 984-1001.
[5] Ren-peng Chen, Jin-miao Chen, Han-lin Wang. Recent research on the track-subgrade of high-speed railways[J]. Journal of Zhejiang University-SCIENCE A (Applied Physics & Engineering), 2014, 15(12): 1034-1038.
[6] Liang Ling, Xin-biao Xiao, Jia-yang Xiong, Li Zhou, Ze-feng Wen, Xue-song Jin. A 3D model for coupling dynamics analysis of high-speed train/track system[J]. Journal of Zhejiang University-SCIENCE A (Applied Physics & Engineering), 2014, 15(12): 964-983.
[7] Xue-song Jin. Key problems faced in high-speed train operation[J]. Journal of Zhejiang University-SCIENCE A (Applied Physics & Engineering), 2014, 15(12): 936-945.
[8] Yuan-feng Duan, Ru Zhang, Yang Zhao, Siu-wing Or, Ke-qing Fan, Zhi-feng Tang. Smart elasto-magneto-electric (EME) sensors for stress monitoring of steel structures in railway infrastructures[J]. Journal of Zhejiang University-SCIENCE A (Applied Physics & Engineering), 2011, 12(12): 895-901.
[9] Li Wang, Li-min Jia, Yong Qin, Jie Xu, Wen-ting Mo. A two-layer optimization model for high-speed railway line planning[J]. Journal of Zhejiang University-SCIENCE A (Applied Physics & Engineering), 2011, 12(12): 902-912.
[10] Bian Xue-Cheng, Chen Yun-Min. Analysis of moving load induced ground vibrations based on thin-layer method[J]. Journal of Zhejiang University-SCIENCE A (Applied Physics & Engineering), 2006, 7(Supplement 2): 309-314.