本文選題：非金屬管道 + 水動力載荷�。� 參考：《浙江大學(xué)》2015年碩士論文

【摘要】：相比于鋼管,非金屬管道具有優(yōu)良的耐腐蝕性和柔韌性,極大的降低了海洋平臺輸油管道鋪設(shè)成本,縮短管道施工周期的同時還可以保證油氣產(chǎn)品質(zhì)量,成為海上油氣運輸管道的新選擇。 作為海洋油氣開發(fā)的生命線工程,從經(jīng)濟和環(huán)境因素考慮必須保證管道在惡劣環(huán)境下的安全。對于直接擱置在海床上的非金屬管道,由于重量輕,管道在位穩(wěn)性問題顯得尤為重要。當(dāng)管道自身重量不足以保持其在位穩(wěn)性時必須考慮附加配重的方式,一個合適的分析方法對非金屬管道附加配重的確定具有重大意義。 本文主要研究海洋管道在波流水動力載荷作用下的在位穩(wěn)性,從水動力載荷計算、管土相互作用模擬及水動力載荷和管土作用之間的耦合影響三個方面考慮整體建模。目的在于建立一個海底穩(wěn)性整體分析計算模型,具體的研究方法包括： (1)利用FORTRAN語言編寫JONSWAP波譜海平面運動方程,估算管道處波浪運動,利用UWAVE子程序與ABAQUS主程序銜接并通過ABAQUS/AQUA模塊施加水動力載荷。 (2)分別從管土相互作用近似公式模型和理論彈塑性本構(gòu)模型出發(fā),利用FORTRAN語言編寫管道-海床接觸對摩擦FRIC子程序和自定義管土接觸單元UEL子程序。 (3)利用ABAQUS數(shù)值模擬軟件導(dǎo)入水動力模型及管土相互作用模型子程序,考慮管道自身的結(jié)構(gòu)運動更新水動力模型及管土模型子程序,對管道整體結(jié)構(gòu)進行動態(tài)分析。 (4)考慮整體模型中參數(shù)的不確定性因素,對管道在位穩(wěn)性進行響應(yīng)面可靠性設(shè)計,基于目標(biāo)安全水平確定最優(yōu)配重。
[Abstract]:Compared with steel pipes, non-metallic pipelines have excellent corrosion resistance and flexibility, greatly reducing the laying cost of oil pipelines on offshore platforms, shortening the construction period of pipelines, and ensuring the quality of oil and gas products at the same time. As a lifeline project for offshore oil and gas development, it is necessary to ensure the safety of the pipeline under the adverse environment considering the economic and environmental factors. For the non-metallic pipeline which is placed directly on the seabed, the problem of pipeline stability is very important because of its light weight. When the weight of the pipe itself is not sufficient to maintain its stability in the position, the mode of additional weight must be considered. A suitable analytical method is of great significance for determining the additional weight of non-metallic pipelines. In this paper, the in-situ stability of offshore pipelines under the action of wave-current hydrodynamic loads is studied, and the hydrodynamic loads are calculated. The whole modeling is considered in three aspects: pipe-soil interaction simulation and coupling effect between hydrodynamic load and pipe-soil interaction. The purpose of this paper is to establish a global analysis and calculation model of submarine stability. The specific research methods include: 1) compiling the equation of sea level motion of JONSWAP spectrum using FORTRAN language to estimate the wave motion in the pipeline. Using UWAVE subprogram and Abaqus main program, and applying hydrodynamic load through Abaqus / AQUA module. (2) starting from the approximate formula model of pipe-soil interaction and the theoretical elastic-plastic constitutive model, respectively. The FRIC subprogram of pipe-seabed contact to friction and the subroutine of self-defined tube-soil contact unit UEL are compiled by FORTRAN language. The subprograms of hydrodynamic model and pipe-soil interaction model are introduced by Abaqus numerical simulation software. Considering the hydrodynamic model of pipeline itself and the subroutine of pipe-soil model, the dynamic analysis of the whole structure of pipeline is carried out. (4) considering the uncertain factors of parameters in the whole model, the reliability of response surface is designed for the in-situ stability of pipeline. The optimal counterweight is determined based on the target safety level.
【學(xué)位授予單位】：浙江大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：TE973

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