基于fluent的路基断面设计以及防雪设施设置研究
发布时间：2018-11-03 11:25
【摘要】：风吹雪是北方常见的一种自然灾害,会埋没公路,对行车安全带来危害,过去国内外不少学者对此做了研究也取得不小进展。本文在前人研究基础上运用计算机仿真模拟对现有路基断面设计形式进行仿真模拟,对防雪设施设计的合理性进行模拟,通过对路堤式路基断面、路堑式路基断面、半路堑式路基断面、分离式路基断面的设计进行仿真模拟,从中找出有效治理和预防新疆当地风吹雪灾害最优化的路基断面设计参数以及防雪设施设计参数,对以后当地的风吹雪灾害安全防护提供借鉴。Fluent软件是基于流体力学和流体动力学对空气流体流动情况进行描述,采用一组偏微分方程进行描述。本文采用K-ε湍流物理模型进行模拟,这一点与实际风场接近。本文利用fluent作为仿真模拟平台对防雪设施设计以及道路路基断面设计进行研究。主要研究内容有:1)对不同路基断面形式,不同边坡度和高度用不同风速进行测试,确定雪害地区合理的路基横断面形式。2)对不同高度的防雪栅栏开展不同风速风雪流场的影响模拟,通过对防雪栅栏高度与防雪栅栏后积雪长度L之间的关系进行对比分析,确定防雪栅栏的合理高度。3)对不同高度防雪栅栏和不同边坡度和高度的四种路基断面进行组合,并且开展栅栏距公路不同距离对风雪流场的影响模拟,通过防雪栅栏后积雪长度L与防雪栅栏高H之间的关系对比以及风速变化影响,确定合理的路基断面形式和防雪栅栏组合设计方案。最后对本论文进行总结,对未来研究工作进行展望。
[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.
【学位授予单位】：新疆农业大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：U416.1;U417
本文编号：2307649
[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.
【学位授予单位】：新疆农业大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：U416.1;U417
【参考文献】
相关博士学位论文 前1条
1 吕晓辉;风雪两相流的风洞实验研究[D];兰州大学;2012年
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