本文選題：埋地管道 + 彈性地基梁��； 參考：《東北石油大學》2017年碩士論文

【摘要】：因為長距離輸油管道周圍的環(huán)境十分復雜,地理條件千差萬別,因此在輸油管道鋪設和運營的過程中不可避免地會遇到各種各樣的地質(zhì)災害區(qū),而這些災害區(qū)會給管線的長時間安全運營構(gòu)成嚴重威脅。本文主要研究凍土凍脹作用下埋地管道的力學性能和地震與凍脹聯(lián)合作用下的復雜荷載對埋地管道正常運營的影響。論文的主要研究內(nèi)容及成果包括以下幾個方面:(1)為及時了解凍土區(qū)管道運營期間結(jié)構(gòu)受力性狀的變化,本文利用鐵木辛柯《材料力學》中有關(guān)彈性地基梁的基本解答,得到了在土體發(fā)生不均勻凍脹情況下埋地管線軸向應力與位移沿管線軸向變化的相關(guān)解答。(2)通過查閱文獻及理論研究,應用有限元軟件ADINA建立了三維管土溫度場模型,模擬了埋地管道溫度場的分布,并與文獻記錄中的實測地溫進行了比對。(3)應用有限元軟件ADINA建立了三維管土實體結(jié)構(gòu)模型,通過對埋地管道進行熱力耦合分析,計算了土體發(fā)生凍脹后管道的凍脹力,分析了溫度、管道埋深、過渡段長度、管道內(nèi)壓、凍脹段長度等因素對凍土區(qū)埋地管道力學性能的影響,確定了管道受力最大的位置。(4)在土體發(fā)生凍脹的基礎上施加地震作用,分析地震作用與土體凍脹組合形成的復雜荷載對埋地管道結(jié)構(gòu)的影響,分析了溫度、管道埋深、過渡段長度、管道內(nèi)壓、凍脹段長度等因素的影響,為埋地管線在復雜荷載作用下的研究提供一些參考。
[Abstract]:Because the environment around the long-distance oil pipeline is very complex and the geographical conditions vary widely, it is inevitable that various geological disaster areas will be encountered in the course of laying and operating the pipeline. These disaster areas pose a serious threat to the long-term safe operation of pipelines. In this paper, the mechanical properties of buried pipelines under frost heaving and the influence of complex loads under the combined action of earthquake and frost heave on the normal operation of buried pipelines are studied. The main research contents and results of this paper include the following aspects: 1) in order to understand the change of structural mechanical behavior during pipeline operation in frozen soil area, the basic solution of elastic foundation beam in Timuxinko "Mechanics of Materials" is used in this paper. The solution of axial stress and displacement variation along the pipeline axis under the condition of uneven frost heaving is obtained. By consulting the literature and theoretical research, the three-dimensional temperature field model of pipe and soil is established by using the finite element software ADINA. The distribution of temperature field of buried pipeline is simulated, and compared with the measured ground temperature in the literature. The finite element software ADINA is used to set up a three-dimensional solid structure model of pipe and soil, and the thermodynamic coupling analysis of buried pipeline is carried out. The influence of temperature, buried depth of pipeline, length of transition section, internal pressure of pipeline and length of frost heaving section on the mechanical properties of buried pipeline in frozen soil are analyzed. The maximum position of pipeline force is determined. (4) earthquake action is applied on the basis of soil frost heave. The influence of complex load formed by earthquake action and soil frost heaving on buried pipeline structure is analyzed, and the temperature and buried depth of pipeline are analyzed. The influence of the factors such as the length of the transition section, the internal pressure of the pipeline and the length of the frost-heave section provides some references for the study of buried pipeline under complex loads.
【學位授予單位】：東北石油大學
【學位級別】：碩士
【學位授予年份】：2017
【分類號】：TE88

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