|Table of Contents|

Numerical Simulation of Vibration Isolation Effect of Ditch Barriers on High-speed Train in Loess Areas, China(PDF)

《地球科学与环境学报》[ISSN:1672-6561/CN:61-1423/P]

Issue:
2025年第03期
Page:
371-385
Research Field:
黄河流域生态保护和高质量发展专刊(上)
Publishing date:

Info

Title:
Numerical Simulation of Vibration Isolation Effect of Ditch Barriers on High-speed Train in Loess Areas, China
Author(s):
LI Liang-zhong1;  DENG Ya-hong1; 2; 3*;  NIU De-xin1
(1.School of Geological Engineering and Geomatics,Chang'an University,Xi'an 710054,Shaanxi,China; 2.Key Laboratory of Mine Geological Hazards Mechanism and Control of Ministry of Natural Resources,Xi'an 710054,Shaanxi,China; 3.Key Laboratory of Western China's Mineral Resources and Geological Engineering of Ministry of Education,Chang'an University,Xi'an 710054,Shaanxi,China)
Keywords:
ditch barrier;  high-speed train;  vibration;  finite element;  isolation effect;  railway embankment;  loess area
PACS:
TU435
DOI:
10.19814/j.jese.2025.01032
Abstract:
Along with the continuous increase in the operating mileage of high-speed railways, the environmental vibration problems caused by long-term operation of high-speed railways are receiving increasing attention. At present, there is a wealth of research on the vibration characteristics of high-speed trains in loess areas, but there is relatively little research on the isolation of high-speed trains in loess areas. A high-speed train track-embankment-ditch barrier finite element model was established based on numerical methods using the embankment section of Datong-Xi'an high-speed railway as a prototype; the influences of ditch barrier's position, depth, width, filling material and cross-sectional shape, as well as train speed on its vibration isolation effect were studied, and the vibration isolation law of high-speed railway ditch barriers in loess areas was revealed. The results show that the closer the location of the ditch barrier is to the centerline of vibration source, the weaker the amplification effect of soil in the front area of the ditch barrier, and the better and wider the vibration isolation effect behind the ditch barrier; the vibration isolation effect of ditch barrier increases with depth and width, and the improvement in depth is greater than that in width; the greater the difference in properties between the filling material and loess, the better the vibration isolation effect; the inclined sidewall can weaken the amplification effect in front of open ditch barrier and the ditch barrier filled with soft material, and the weakening amplitude of vibration amplification effect increases with the decrease of sidewall inclination angle, and the decrease in side wall inclination angle also weaken the vibration isolation effect of ditch barrier; when the train runs at a higher speed, the amplification effect of vibration in the front area of ditch barrier is enhanced, but it still has a good vibration isolation effect behind the ditch barrier.

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Last Update: 2025-06-20