NDLI: Numerical analysis of soil vibrations due to trains moving at critical speed

Content Provider	Springer Nature Link
Author	Bian, Xuecheng Cheng, Chong Jiang, Jianqun Chen, Renpeng Chen, Yunmin
Copyright Year	2014
Abstract	High-speed train induced vibrations of track structure and underlying soils differ from that induced by low-speed train. Determining the critical speed of train operation remains difficult due to the complex properties of the track, embankment and ground. A dynamic analysis model comprising track, embankment and layered ground was presented based on the two-and-half-dimensional (2.5D) finite elements combining with thin-layer elements to predict vibrations generated by train moving loads. The track structure is modeled as an Euler–Bernoulli beam resting on embankment. The train is treated as a series of moving axle loads; the embankment and ground are modeled by the 2.5D finite elements. The dynamic responses of the track structure and the ground under constant and vibrating moving loads at various speeds are presented. The results show that the critical speed of a train moving on an embankment is higher than the Rayleigh wave velocity of the underlying soil, attributed to the presence of the track structure and the embankment. It is found that the dynamic response of ground induced by moving constant loads is mostly dominated by train speed. While for the moving load with vibration frequency, the ground response is mostly affected by the vibration frequency instead of train speed. Mach effect appears when the train speed exceeds the critical speed of the track–embankment–ground system.
Starting Page	281
Ending Page	294
Page Count	14
File Format	PDF
ISSN	18611125
Journal	Acta Geotechnica
Volume Number	11
Issue Number	2
e-ISSN	18611133
Language	English
Publisher	Springer Berlin Heidelberg
Publisher Date	2014-04-29
Publisher Place	Berlin, Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Critical speed 2.5D finite element method High-speed train Mach effect Track–embankment–ground dynamic interaction Geoengineering, Foundations, Hydraulics Continuum Mechanics and Mechanics of Materials Geotechnical Engineering & Applied Earth Sciences Soil Science & Conservation Soft and Granular Matter, Complex Fluids and Microfluidics Structural Mechanics
Content Type	Text
Resource Type	Article
Subject	Geotechnical Engineering and Engineering Geology

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