【摘要】：風(fēng)吹雪是北方常見的一種自然災(zāi)害,會埋沒公路,對行車安全帶來危害,過去國內(nèi)外不少學(xué)者對此做了研究也取得不小進(jìn)展。本文在前人研究基礎(chǔ)上運用計算機(jī)仿真模擬對現(xiàn)有路基斷面設(shè)計形式進(jìn)行仿真模擬,對防雪設(shè)施設(shè)計的合理性進(jìn)行模擬,通過對路堤式路基斷面、路塹式路基斷面、半路塹式路基斷面、分離式路基斷面的設(shè)計進(jìn)行仿真模擬,從中找出有效治理和預(yù)防新疆當(dāng)?shù)仫L(fēng)吹雪災(zāi)害最優(yōu)化的路基斷面設(shè)計參數(shù)以及防雪設(shè)施設(shè)計參數(shù),對以后當(dāng)?shù)氐娘L(fēng)吹雪災(zāi)害安全防護(hù)提供借鑒。Fluent軟件是基于流體力學(xué)和流體動力學(xué)對空氣流體流動情況進(jìn)行描述,采用一組偏微分方程進(jìn)行描述。本文采用K-ε湍流物理模型進(jìn)行模擬,這一點與實際風(fēng)場接近。本文利用fluent作為仿真模擬平臺對防雪設(shè)施設(shè)計以及道路路基斷面設(shè)計進(jìn)行研究。主要研究內(nèi)容有:1)對不同路基斷面形式,不同邊坡度和高度用不同風(fēng)速進(jìn)行測試,確定雪害地區(qū)合理的路基橫斷面形式。2)對不同高度的防雪柵欄開展不同風(fēng)速風(fēng)雪流場的影響模擬,通過對防雪柵欄高度與防雪柵欄后積雪長度L之間的關(guān)系進(jìn)行對比分析,確定防雪柵欄的合理高度。3)對不同高度防雪柵欄和不同邊坡度和高度的四種路基斷面進(jìn)行組合,并且開展柵欄距公路不同距離對風(fēng)雪流場的影響模擬,通過防雪柵欄后積雪長度L與防雪柵欄高H之間的關(guān)系對比以及風(fēng)速變化影響,確定合理的路基斷面形式和防雪柵欄組合設(shè)計方案。最后對本論文進(jìn)行總結(jié),對未來研究工作進(jìn)行展望。
[Abstract]:Wind and snow is a common natural disaster in the north, which will bury the highway and bring harm to the driving safety. Many scholars at home and abroad have made great progress in the past. On the basis of previous research, this paper simulates the existing roadbed section design form by using computer simulation, and simulates the rationality of the design of snow prevention facilities, through the section of embankment subgrade, cutting roadbed section, The design of semi-cut subgrade section and separated roadbed section is simulated to find out the optimum design parameters of roadbed section and snow prevention facilities in Xinjiang for effectively controlling and preventing local wind-blowing snow disasters. The Fluent software is based on hydrodynamics and hydrodynamics to describe the air fluid flow, and a set of partial differential equations are used to describe it. K- 蔚 turbulence physical model is used in this paper, which is close to the actual wind field. In this paper, fluent is used as a simulation platform to study the design of snow prevention facilities and road subgrade section design. The main research contents are as follows: 1) different roadbed cross-section, different edge slope and height are measured with different wind speed. The reasonable cross section form of roadbed in snow damage area is determined. 2) the effects of different wind speed and snow flow field on snow barrier with different height are simulated, and the relationship between snow fence height and snow cover length L after snow fence is compared and analyzed. Determine the reasonable height of snow fence. 3) combine the four subgrade sections of different height snow fence and different edge slope and height, and carry out the simulation of the influence of different distance from the fence to the highway on the snowstorm flow field. By comparing the relationship between snow cover length L and the height H of snow fence after snow fence and the influence of wind speed, the reasonable roadbed section form and the combination design scheme of snow fence are determined. Finally, this paper is summarized and the future research work is prospected.
【學(xué)位授予單位】：新疆農(nóng)業(yè)大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2014
【分類號】：U416.1;U417

【參考文獻(xiàn)】

相關(guān)博士學(xué)位論文 前1條

1 呂曉輝;風(fēng)雪兩相流的風(fēng)洞實驗研究[D];蘭州大學(xué);2012年

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本文編號：2307649