Flexible Risers(柔性立管)研究综述
Flexible Risers 柔性立管 - This paper presents the development of an automated inspection system for flexible risers that are used to connect wellheads on the seafloor to the offshore production and storage facility. [1] Failure of flexible risers can occur, among several factors, due to their cold drawn carbon steel tensile armor wires collapse. [2] During the installation of marine flexible pipelines, components, such as flexible risers, umbilicals, and cables, subject to wave motion and ship yaw can cause torque on such pipelines. [3] Purpose The inspection of flexible risers is a critical activity to ensure continuous productivity and safety in oil and gas production. [4] Flexible risers are designed with strong anti-collapse capacities which enable them to operate in deep-water reservoirs. [5] A real-time understanding of the structural integrity of flexible risers is critical to avoiding failures as well as unnecessary and costly replacements. [6] The flexible risers, usually installed in lazy wave configurations at such water depths, were optimized reducing the total buoyancy necessary. [7] Flexible risers have been widely utilized for the transfer of oil and gas products from a well to production units. [8] Flexible risers are widely employed in deep-sea oil and gas development. [9] In recent years, the dynamic responses of flexible risers have been the focus of many researchers. [10] For flexible risers, this competitiveness will become even more prominent. [11] Fatigue life of flexible risers is a critical design factor in offshore riser system design. [12] Calculating the wet collapse pressure of flexible risers is always challenging since the layers within risers are different in geometries and materials. [13] The helically wound structure is widely applied in ocean and civil engineering as load-bearing structures with high flexibility, such as wire ropes, umbilical cables and flexible risers. [14] Apart from the vortex-induced vibration (VIV) caused by flow over flexible risers, internal slug flow-induced vibration (FIV) is extensively encountered in practice as risers are conveying oil–gas two-phase flow. [15] The storm-based probabilistic analysis is applied to responses of flexible risers with the objective to develop their distributions in a storm and to determine their most probable maximum (MPM) values. [16] In this study, numerical models of two kinds of flexible risers, namely, catenary riser and lazy wave riser, are established in OrcaFlex software. [17] In this study, an efficient time-domain prediction model is developed to predict unsteady flow vortex-induced vibrations (VIV) of flexible risers. [18] The complexity of these flexible risers and the hostile conditions in a deep-water environment present major challenges for non-intrusive, in-service inspection. [19] Flow-induced pulsations in flexible risers and flowlines (FLIP) has been the subject of ongoing research roughly over the last two decades. [20] A dynamic analysis of flexible risers in large-scale domain remains the offshore industry’s most challenging problems. [21] This paper presents a two-dimensional parametric analysis of the influence of an internal slug flow on the structural dynamic response of flexible risers. [22] As water depths for oil and gas exploration and extraction increase, structures such as flexible risers, mooring lines, and umbilical cables are increasingly being used for subsea environments. [23]本文介绍了用于将海底井口连接到海上生产和储存设施的柔性立管的自动检测系统的开发。 [1] 在多种因素中，由于其冷拔碳钢拉伸铠装线塌陷，可能会发生柔性立管的故障。 [2] 在船舶柔性管道的安装过程中，柔性立管、脐带管和电缆等部件会受到波浪运动和船舶偏航的影响，从而在此类管道上产生扭矩。 [3] 目的 柔性立管的检查是确保石油和天然气生产的持续生产力和安全性的关键活动。 [4] 柔性立管的设计具有很强的抗塌陷能力，使其能够在深水水库中运行。 [5] 实时了解柔性立管的结构完整性对于避免故障以及不必要且成本高昂的更换至关重要。 [6] 柔性立管通常安装在这种水深的懒惰波浪配置中，经过优化，减少了所需的总浮力。 [7] 柔性立管已广泛用于将石油和天然气产品从油井输送到生产装置。 [8] 柔性立管广泛应用于深海油气开发。 [9] 近年来，柔性立管的动态响应一直是许多研究人员关注的焦点。 [10] 对于柔性立管来说，这种竞争力将更加突出。 [11] 柔性立管的疲劳寿命是海上立管系统设计的关键设计因素。 [12] 计算柔性立管的湿塌陷压力总是具有挑战性的，因为立管内的层在几何形状和材料上是不同的。 [13] 螺旋缠绕结构广泛应用于海洋和土木工程中，作为具有高柔韧性的承重结构，如钢丝绳、脐带缆和柔性立管。 [14] 除了由柔性立管上的流动引起的涡激振动（VIV）外，由于立管输送油气两相流，因此在实践中广泛遇到内部段塞流诱发振动（FIV）。 [15] 基于风暴的概率分析应用于柔性立管的响应，目的是发展它们在风暴中的分布并确定它们的最可能最大值 (MPM) 值。 [16] 本研究在OrcaFlex软件中建立了悬链线立管和惰性波浪立管两种柔性立管的数值模型。 [17] 在这项研究中，开发了一种有效的时域预测模型来预测柔性立管的非定常流动涡激振动 (VIV)。 [18] 这些柔性立管的复杂性和深水环境中的恶劣条件对非侵入式在役检查提出了重大挑战。 [19] 在过去的二十年里，柔性立管和出油管 (FLIP) 中的流动引起的脉动一直是正在进行的研究的主题。 [20] 大规模领域中柔性立管的动态分析仍然是海上工业最具挑战性的问题。 [21] 本文介绍了内部段塞流对柔性立管结构动力响应影响的二维参数分析。 [22] 随着石油和天然气勘探和开采水深的增加，柔性立管、系泊线和脐带电缆等结构越来越多地用于海底环境。 [23]
vortex induced vibration 涡激振动
Under the actions of ocean currents and/or waves, deep-sea flexible risers are often subject to vortex-induced vibration (VIV). [1] As an important component transporting resources such as oil and mineral ores mixture from the seabed to the surface in ocean engineering, vortex-induced vibration (VIV) of flexible risers can be encountered when the risers are subjected to the external environmental conditions. [2]在洋流和/或波浪的作用下，深海柔性立管经常受到涡激振动（VIV）的影响。 [1] 作为海洋工程中将石油和矿石混合物等资源从海床输送到地表的重要组成部分，柔性立管在受到外部环境条件影响时会遇到涡激振动（VIV）。 [2]
Unbonded Flexible Risers
Interlocked armor layers of unbonded flexible risers may crush when risers are being launched. [1] Nevertheless, detailed understanding of local armor wire stresses and the related fatigue phenomena is of paramount importance as unbonded flexible risers are often operated close to their mechanical limits. [2] ABSTRACT Unbonded flexible risers have been applied in the harsh environment for several decades, and structural failure sometimes appears. [3]发射立管时，未粘合的柔性立管的联锁装甲层可能会压碎。 [1] 然而，详细了解局部铠装钢丝应力和相关的疲劳现象至关重要，因为未粘合的柔性立管通常在接近其机械极限的情况下运行。 [2] 摘要 非粘合柔性立管在恶劣环境中应用了几十年，有时会出现结构失效。 [3]
Sea Flexible Risers 海灵活立管
With the development of deep-sea oil and gas resources, the aspect ratio of deep-sea flexible riser has reached the order of 102–103, which makes the experimental model of the equal scale of deep-sea flexible risers challenging to achieve under typical experimental conditions. [1] Under the actions of ocean currents and/or waves, deep-sea flexible risers are often subject to vortex-induced vibration (VIV). [2]随着深海油气资源的开发，深海柔性立管纵横比已达到102~103数量级，这使得深海柔性立管等尺度实验模型在典型条件下难以实现。实验条件。 [1] 在洋流和/或波浪的作用下，深海柔性立管经常受到涡激振动（VIV）的影响。 [2]