铁道标准设计
鐵道標準設計
철도표준설계
RAILWAY STANDARD DESIGN
2014年
11期
52-56
,共5页
阿联酋铁路%风沙防治%CFD%数值模拟
阿聯酋鐵路%風沙防治%CFD%數值模擬
아련추철로%풍사방치%CFD%수치모의
UAE railway%Sand prevention%CFD%Numerical simulation
结合阿联酋联合铁路工程背景,采用 CFD 技术对风沙防治措施进行模拟分析,并根据计算结果进行风沙防治措施设计,使设计更趋于合理化。基于阿联酋风沙实际情况,分别利用 GAMBIT 软件和 ANSYS 软件建立路基整体风洞模型和阻沙栅栏二维模型,并用 FLUENT 软件进行求解,根据对比分析选取适宜的路基边坡坡率、地表覆盖物粒径、阻沙栅栏疏透率等设计参数,进行风沙防治措施设计。结论：(1)风沙路基应采用放缓路基边坡坡率的措施,路堤边坡坡率以1：2~1：5为宜；(2)路基两侧应平铺砾石土覆盖于沙地表面,粒径不宜小于5 cm；(3)阻沙栅栏高度宜采用1.5m,按疏透度0.4采取适宜的布置形式。
結閤阿聯酋聯閤鐵路工程揹景,採用 CFD 技術對風沙防治措施進行模擬分析,併根據計算結果進行風沙防治措施設計,使設計更趨于閤理化。基于阿聯酋風沙實際情況,分彆利用 GAMBIT 軟件和 ANSYS 軟件建立路基整體風洞模型和阻沙柵欄二維模型,併用 FLUENT 軟件進行求解,根據對比分析選取適宜的路基邊坡坡率、地錶覆蓋物粒徑、阻沙柵欄疏透率等設計參數,進行風沙防治措施設計。結論：(1)風沙路基應採用放緩路基邊坡坡率的措施,路隄邊坡坡率以1：2~1：5為宜；(2)路基兩側應平鋪礫石土覆蓋于沙地錶麵,粒徑不宜小于5 cm；(3)阻沙柵欄高度宜採用1.5m,按疏透度0.4採取適宜的佈置形式。
결합아련추연합철로공정배경,채용 CFD 기술대풍사방치조시진행모의분석,병근거계산결과진행풍사방치조시설계,사설계경추우합이화。기우아련추풍사실제정황,분별이용 GAMBIT 연건화 ANSYS 연건건립로기정체풍동모형화조사책란이유모형,병용 FLUENT 연건진행구해,근거대비분석선취괄의적로기변파파솔、지표복개물립경、조사책란소투솔등설계삼수,진행풍사방치조시설계。결론：(1)풍사로기응채용방완로기변파파솔적조시,로제변파파솔이1：2~1：5위의；(2)로기량측응평포력석토복개우사지표면,립경불의소우5 cm；(3)조사책란고도의채용1.5m,안소투도0.4채취괄의적포치형식。
The sand prevention measures, simulated with CFD technology in view of UAE railway engineering background, are calculated and designed to be more realistic. The wind tunnel model and sand fence two-dimensional model are established with GAMBIT and ANSYS software based on the actual situations in UAE. Based on the comparative analysis to select appropriate design parameters, such as particle size of surface coverage, subgrade slope rate, and resistance rate of sand fence, prevention measures are designed. It is concluded that (1) the measures to slow down subgrade slope rate should be adopted, and the suitable slope rate is around 1 : 2 to 1 : 5; (2) the surface on both sides of subgrade should be covered with sand gravel soil, and the particle size should not be less than 5 cm; (3) the height of sand fence should be 1. 5 m with appropriate arrangement according to the resistance rate of 0. 4.
