本文選題：S型管道鋪設 + 失效分析　； 參考：《大連理工大學》2015年碩士論文

【摘要】：S-Lay型鋪設由于穩(wěn)定性好、鋪設效率高、適應范圍廣,逐步成為了海洋管道鋪設的發(fā)展趨勢。然而,由于荷載模型的適用性存疑,復雜力學問題的數(shù)值求解困難,以及模型試驗受復雜荷載難于模擬和比尺效應制約等問題的存在,使得管道與托管架在鋪設過程中仍存在著失效隱患。為了針對鋪設海域的荷載特征,驗證設計選用荷載模型的合理性,開展管道與托管架的響應的原型測量,驗證其設計指標并對鋪設期間結構的安全進行評價,本文發(fā)展了面向深水S型管道鋪設的原型監(jiān)測方案。主要研究內(nèi)容在于：依據(jù)現(xiàn)有海洋荷載模型與管道和托管架結構的失效模式,總結并提出了適用于現(xiàn)場監(jiān)測的原型信息。尤其是針對鋪設期間管道的狀態(tài)參量與力學參量難于直接測量的難點,提出了通過對托管架、張緊器等結構的鋪設狀態(tài)參數(shù)的測量,間接獲取管道狀態(tài)參數(shù)與力學參量的原型測量方案。針對托管架節(jié)點過多難以逐一展開測量的特點,結合托管架整體與局部數(shù)值分析,擬定了應變測量的熱點位置與方案。結合實際環(huán)境與作業(yè)條件,確定了測量設備與布點位置,構建了完整的現(xiàn)場監(jiān)測方案,通過現(xiàn)場與室內(nèi)試驗驗證了本文擬定監(jiān)測方案的有效性與可行性。算例分析結果顯示出監(jiān)測方案可以良好的保證下彎段內(nèi)力測量方案的正確性。擬定出面向結構主要失效形式的安全評價方案,設計了面向現(xiàn)場監(jiān)測的集成系統(tǒng),通過監(jiān)測系統(tǒng)可實現(xiàn)在管道S型鋪設期間對結構的安全行為的實時評價。
[Abstract]:Due to its good stability, high laying efficiency and wide adaptability, S-Lay type laying has gradually become the development trend of offshore pipeline laying. However, because the applicability of the load model is doubtful, the numerical solution of the complex mechanics problem is difficult, and the model test is restricted by the complex load and the scale effect. The pipeline and the trusteeship still have hidden trouble in the course of laying. In order to verify the rationality of the load model used in the design according to the load characteristics of the laying area, the prototype measurement of the response of the pipeline and the pedestal frame is carried out, the design index is verified and the safety of the structure during the laying period is evaluated. A prototype monitoring scheme for S-type pipeline laying in deep water is developed in this paper. The main research contents are as follows: according to the existing ocean load model and the failure mode of pipeline and frame structure, the prototype information suitable for field monitoring is summarized and put forward. Especially in view of the difficult point that it is difficult to directly measure the state parameters and mechanical parameters of pipeline during laying, the paper puts forward the measurement of laying state parameters of the structure, such as the tube frame, tensioner, etc. The prototype measurement scheme of pipeline state parameters and mechanical parameters is obtained indirectly. In view of the fact that too many nodes of the trusteeship frame are difficult to be measured one by one, the hot spot and scheme of strain measurement are proposed by combining with the integral and local numerical analysis of the frame. Combined with the actual environment and operation conditions, the location of measuring equipment and points is determined, and a complete field monitoring scheme is constructed. The effectiveness and feasibility of the monitoring scheme are verified by field and indoor tests. The results of numerical examples show that the monitoring scheme can guarantee the correctness of the internal force measurement scheme. A safety evaluation scheme for the main failure forms of the structure is proposed and an integrated system for on-site monitoring is designed. The real-time evaluation of the safety behavior of the structure during the S-type pipeline laying can be realized by the monitoring system.
【學位授予單位】：大連理工大學
【學位級別】：碩士
【學位授予年份】：2015
【分類號】：P756.2;TP274

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本文編號：1973383