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  本文關(guān)鍵詞： 管道 失效 剩余壽命 markov過程 成本 維修　出處：《西安建筑科技大學(xué)》2015年碩士論文　論文類型：學(xué)位論文

【摘要】：油氣管道的建設(shè)在當代愈發(fā)頻繁,而由油氣管道出現(xiàn)泄漏造成的有毒氣體擴散、燃燒、爆炸等事故會對人員生命及財產(chǎn)安全帶來極為嚴重的隱患。為此建立行之有效的管道管理機制,保證其安全運行便具有十分重要的意義。在管道的管理工作中安排高效合理的維修策略是其重要的組成部分之一。論文主要對如下內(nèi)容進行了研究:(1)分析了油氣管道的失效模式,確定腐蝕缺陷的最大腐蝕深度為評價管道失效的指標。以管道的斷裂力學(xué)形式為失效標準,比較油氣管道的剩余應(yīng)力與正常工作應(yīng)力,將剩余應(yīng)力等于正常工作應(yīng)力作為油氣管道的極限狀態(tài)。ASME-B31G標準規(guī)定的管道剩余應(yīng)力計算方法為基礎(chǔ),設(shè)計腐蝕損傷軸向與徑向缺陷長度發(fā)展函數(shù),只考慮點蝕的情況下,將所需要考慮的腐蝕缺陷尺寸簡化為最大的腐蝕深度。(2)使用markov理論模型模擬具有腐蝕損傷的油氣管道的劣化過程,得到管道狀態(tài)概率與運行時間之間的對應(yīng)關(guān)系,以及管道的概率壽命。通過將腐蝕損傷的徑向腐蝕尺寸劃分為離散的范圍,將管道的劣化描述為管道在這些離散狀態(tài)之間的轉(zhuǎn)移,管道的失效概率描述為管道在某時刻在下一時刻跳轉(zhuǎn)至失效狀態(tài)的概率。(3)建立基于markov理論的油氣管道維修決策模型。根據(jù)管道的機械特點和失效特點,將管道作為可修復(fù)系統(tǒng)進行研究。以markov理論的管道劣化模型為基礎(chǔ),加入維修的信息(修復(fù)率和成本),提出油氣管道維修決策模型,可得到不同維修策略下管道長期內(nèi)的可用度與總成本期望。并以XX線輸油管道某管段為例,為其設(shè)計了在各狀態(tài)(輕、中、重、嚴重、穿孔)分別采取不處理、修補、修復(fù)、更換、更換的維修策略建議。由于研究水平有限,本文所建立的模型假定不存在成本的時間價值以及技術(shù)進步的可能性,從而在全面性上存在一定不足,還需要更進一步的研究。
[Abstract]:The construction of oil and gas pipelines in contemporary become more frequent, and by the oil and gas pipeline leakage of toxic gases caused by diffusion, combustion, explosions and other accidents of people life and property safety brought serious hidden trouble. So as to establish an effective management mechanism of pipeline, to ensure its safe operation is of great significance. In the pipeline the management of work arrangements, reasonable maintenance strategy is one of its important components. This paper mainly studied the following contents: (1) analysis of the failure modes of oil and gas pipeline, determine the maximum corrosion depth of corrosion defects as the evaluation index. The pipeline failure by fracture mechanics for the standard form of pipe failure, the remaining comparison oil and gas pipeline stress and normal working stress, residual stress is equal to the pipeline will be specified in the.ASME-B31G standard limit state of normal working stress as the oil and gas pipeline residual stress meter Calculation method for foundation, design of corrosion damage of axial and radial defect length development function, only consider the pitting situation, the need to consider the corrosion defect size is simplified as the maximum corrosion depth. (2) the deterioration process using the Markov model of oil and gas pipeline with corrosion damage, the corresponding relationship between the pipe state the probability and the running time, life expectancy and pipeline. The radial size division corrosion corrosion damage for discrete range, deterioration of piping is described as the transfer pipe between the discrete state, describing the failure probability of pipeline for probability of pipeline at some time in the next moment to jump to the failure state. (3) the establishment of maintenance decision theory Markov model based on oil and gas pipeline. According to the mechanical characteristics and failure characteristics of the pipeline, the pipeline as a repairable system is studied. The pipeline with Markov theory The deterioration model, adding repair information (repair rate and cost), and put forward the maintenance decision of oil and gas pipeline model, can obtain the desired pipeline under different maintenance strategies in the long-term availability and total cost. And the XX line in a section of pipeline as an example, the design in each state (light. In heavy, serious, perforation) were taken without treatment, repair, repair, replacement, maintenance strategy suggestions replacement. Because of the limited level, the model in this paper assumes that there is no possibility of the time value of cost and technical progress, and there are some deficiencies in the comprehensive, further research is needed.

【學(xué)位授予單位】：西安建筑科技大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：TE973.8

【引證文獻】

相關(guān)會議論文 前1條

1 鄭賢斌;陳國明;;在役埋地油氣管道腐蝕評估與維修決策模型[A];第三屆全國管道技術(shù)學(xué)術(shù)會議壓力管道技術(shù)研究進展精選集[C];2006年

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本文編號：1505437