|Table of Contents|

Height optimization of windbreak wall with holes on high-speed railway bridge(PDF)

《交通运输工程学报》[ISSN:1671-1637/CN:61-1369/U]

Issue:
2013年06期
Page:
28-35
Research Field:
道路与铁道工程
Publishing date:

Info

Title:
Height optimization of windbreak wall with holes on high-speed railway bridge
Author(s):
ZHANG Jie1; 2;  GAO Guang-jun1; 2;  LI Liang-juan1; 2
1. School of Traffic and Transportation Engineering, Central South University, Changsha 410075, Hunan, China; 2. Key Laboratory of Traffic Safety on Track of Ministry of Education, Central South University, Changsha 410075, Hunan, China
Keywords:
high-speed railway;  windbreak wall with holes;  numerical simulation;  equivalent coefficient;  overturning moment;  catenary
PACS:
U216.413
DOI:
-
Abstract:
Based on 3D steady N-S equation and k-ε double-equation turbulent model, the influence of height of windbreak wall with holes on high-speed railway bridge on train aerodynamic performance was simulated by using finite volume method. The relationships among train overturning moment, wind speed at catenary position and the height were analyzed, and the accuracy of present numerical method was validated combining with wind tunnel test. Analysis result shows that after the installment of windbreak wall, the equivalent coefficient absolute values of lateral force and overturning moment decrease speedily with the increase of the height. At the same height, the equivalent coefficient of lift force of train located at leeward line is as half as that at windward line. As there are no windbreak wall or train on bridge, the lateral wind speeds at two lines' catenary position are almost equal, the speeds rise sharply by 28.9% and 27.2% respectively when the train passes windward line and leeward line. After the installment of windbreak wall, the lateral wind speed at catenary position tends to decline with the increase of the height, and the leewardline wind speed reduces rapidly. Whether it is single-side or double-side windbreak wall, the reasonable height of windbreak wall with holes on high-speed railway bridge is 2.8 m. 11 figs, 15 refs.

References:

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Last Update: 2013-12-20