ANSYS热分析模块对土石坝的渗流分析与研究

发布时间：2018-04-07 15:01

本文选题：有限元　切入点：ANSYS　出处：《华北水利水电大学》2016年硕士论文

【摘要】：土石坝是最古老的,同时也是应用最普遍的坝型。无论是在国内还是在国外,土石坝与其他坝型比较都占据着绝对的优势。而土石坝在完工后能否安全运行显得尤为重要,这也使得很多专业的研究人员对土石坝的安全性及稳定性不断的进行着探索和研究。我国在建国初期修建了很多土石坝坝型的水库,而在这批水库中以中小型水库居多,鉴于当时的条件和科技水平下,大多数是一些“三边”(边勘察、边设计、边施工)工程。经过几十年的运行,大多数的水库己出现病险现象,对这些水库进行重新检测及综合评估,在此基础上对其进行除险加固显得非常必要。而渗流问题一直是导致土石坝破坏的重要问题,也是众多研究人员关注的重中之重。土坝的发展史一直伴随着渗流学的发展,虽然至今有很多研究渗流问题的方法,但切合工程实际并能准确计算演示渗流情况的方法却依然很少。随着我国小型水库除险加固过程的推进与加快,使实际工程渗流问题能够得到简便、精确的计算方法更显得重要与迫切。本文以工程实例为基础,首先在CAD软件中建立数值模型,之后利用ANSYS软件的强大分析处理功能以及热分析模块与渗流场的相似性,运用热分析模块对某中型水库的数值仿真模型进行渗流分析,计算得到某中型水库加固前后的渗流情况,得出加固前后坝体的渗透坡降、单宽渗流量、溢出点高程,为科学经济的加固方案提供了理论依据。而对类似的病险水库进行除险加固,若运用本文计算渗流方法可以在得到较切合实际的渗流数据,更够能切合实际工程地采取防渗措施进而减少加固成本。鉴于目前我国正在加快小水库除险加固进程,利用该方法能够更加科学合理地采取相应的加固方案,这对除险加固工程方案更能够达到经济、合理、高效的目的。
[Abstract]:Earth-rock dam is the oldest and most widely used dam type.Both at home and abroad, earth-rock dams have an absolute advantage over other dam types.It is very important for earth and rock dam to operate safely after completion, which makes many professional researchers explore and study the safety and stability of earth and rock dam.In the early days of the founding of the people's Republic of China, many earth-rock dam dams were built in our country, and most of these reservoirs were small and medium-sized ones. In view of the conditions and the level of science and technology at that time, most of them were "trilateral" projects (while surveying, designing and constructing).After several decades of operation, most of the reservoirs have appeared dangerous phenomenon, so it is necessary to re-examine and evaluate these reservoirs, on the basis of which it is very necessary to reinforce them.The seepage problem has been an important problem leading to the destruction of earth-rockfill dams, and is also the most important concern of many researchers.The development of earth dams has been accompanied by the development of seepage science. Although there are many methods to study seepage problems, there are still few methods that can accurately calculate seepage flow in engineering practice.With the advance and acceleration of the strengthening process of small reservoirs in China, it is more important and urgent to obtain a simple and accurate calculation method for practical engineering seepage problems.In this paper, based on engineering examples, a numerical model is established in CAD software, and then the strong analysis and processing function of ANSYS software and the similarity between thermal analysis module and seepage field are used.The numerical simulation model of a medium-sized reservoir is analyzed by using thermal analysis module, and the seepage situation before and after reinforcement is calculated, and the seepage slope, single wide seepage flow and overflow height of the dam before and after reinforcement are obtained.It provides a theoretical basis for the scientific and economic reinforcement scheme.If the seepage method is used in this paper, the seepage data can be obtained, and the anti-seepage measures can be taken in practical engineering to reduce the reinforcement cost.In view of the fact that our country is speeding up the process of danger removal and reinforcement of small reservoirs, the corresponding reinforcement scheme can be adopted more scientifically and reasonably by using this method, which can achieve the purpose of economic, reasonable and efficient.
【学位授予单位】：华北水利水电大学
【学位级别】：硕士
【学位授予年份】：2016
【分类号】：TV641;TV223.4

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