本文選題：海底管道 + 腐蝕缺陷　； 參考：《天津大學(xué)》2014年碩士論文

【摘要】：隨著海底管道在役年限的增長(zhǎng),管道的腐蝕現(xiàn)象日益嚴(yán)重,從而導(dǎo)致其壁厚減薄,剩余強(qiáng)度和最大安全承壓能力降低,管道失效的可能性不斷增大。為確保管道的安全生產(chǎn)作業(yè),有必要根據(jù)管道的檢測(cè)數(shù)據(jù),對(duì)管道進(jìn)行剩余強(qiáng)度評(píng)估和安全性校核以指導(dǎo)管道的生產(chǎn)作業(yè)、維護(hù)維修乃至更換。目前國(guó)內(nèi)外有多種針對(duì)管道剩余強(qiáng)度的評(píng)估方法,常見(jiàn)的有按照國(guó)際通用規(guī)范評(píng)估、有限元評(píng)估、可靠性分析等方法。各種方法其理論基礎(chǔ)、適用范圍和結(jié)果保守性、精度都不盡相同。本文首先研究了兩種國(guó)際通用的腐蝕管道剩余強(qiáng)度評(píng)估規(guī)范:ASME B31G評(píng)估標(biāo)準(zhǔn)和DNV-RP-F101規(guī)范,對(duì)兩種規(guī)范的理論基礎(chǔ)、適用條件和具體評(píng)估步驟做了詳細(xì)的研究和分析,并針對(duì)某一具體工程實(shí)例進(jìn)行了剩余強(qiáng)度校核。研究有限元分析管道剩余強(qiáng)度的基本方法。本文基于彈塑性力學(xué)理論,利用ABAQUS有限元軟件對(duì)管道建立有限元模型,進(jìn)行非線性有限元分析,并重點(diǎn)對(duì)建模和加載過(guò)程中的關(guān)鍵性問(wèn)題進(jìn)行討論分析,得到了較為優(yōu)化和合理的建模和加載方法。根據(jù)研究所得建模加載方法,針對(duì)工程實(shí)例建立腐蝕管道三維實(shí)體模型,計(jì)算管道剩余強(qiáng)度。結(jié)合以上三種評(píng)估方法的原理,對(duì)比不同方法下工程實(shí)例管道的計(jì)算結(jié)果,得到三種方法在適用范圍、操作難易程度以及結(jié)果保守性和精度等方面的差異,為在役海底管道剩余強(qiáng)度的評(píng)估提供指導(dǎo)。
[Abstract]:With the increase of the service life of the submarine pipeline, the corrosion phenomenon of the pipeline becomes more and more serious, which leads to the thinning of the wall thickness, the decrease of the residual strength and the maximum safe bearing capacity, and the increasing possibility of pipeline failure. In order to ensure the safe operation of pipeline, it is necessary to evaluate the residual strength and check the safety of pipeline according to the inspection data of pipeline, so as to guide the production, maintenance and even replacement of pipeline. At present, there are a variety of evaluation methods for residual strength of pipeline at home and abroad, such as evaluation according to international general specification, finite element evaluation, reliability analysis and so on. The theoretical basis, application range and result conservatism of various methods are different. In this paper, two kinds of international standards for evaluating residual strength of corroded pipelines are studied, namely, the W ASME B31G evaluation standard and the DNV-RP-F101 code. The theoretical basis, applicable conditions and concrete assessment steps of the two specifications are studied and analyzed in detail. At the same time, the residual strength of a concrete project is checked. The basic method of finite element analysis for residual strength of pipeline is studied. Based on the theory of elastic-plastic mechanics, the finite element model of pipeline is established by Abaqus finite element software, and the nonlinear finite element analysis is carried out, and the key problems in modeling and loading are discussed and analyzed. A more optimized and reasonable method of modeling and loading is obtained. According to the method of modeling and loading, the three-dimensional solid model of corroded pipeline is established for engineering example, and the residual strength of pipeline is calculated. Combined with the principles of the above three evaluation methods, by comparing the calculation results of engineering examples with different methods, the differences of the three methods in terms of applicability, operation difficulty, conservatism and accuracy of the results are obtained. To provide guidance for the evaluation of the remaining strength of existing submarine pipelines.
【學(xué)位授予單位】：天津大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類號(hào)】：P756.2

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本文編號(hào)：2000639