## Flexible Pipes(软管)研究综述

Flexible Pipes 软管 - Thus, the estimation of the bending cycles number to initiate buckling is favorable to prevent buckling failure and enlarge the potential application scope of flexible pipes.^{[1]}It is also expected, in the near future, to extend the basic idea of this work to explore the nonlinear responses of flexible pipes and hoses conveying fluid subjected rigid stops by introducing a multi-segment articulated pipe model.

^{[2]}Flexible Pipes were widely used in Brazil offshore developments and the challenge on overcoming increasing water depths, high pressures and fluids with high contaminants was always present.

^{[3]}As offshore oil and gas exploration takes place at greater depths, so more flexible pipes are failing by collapsing.

^{[4]}Flexible pipes are critical elements for offshore oil and gas development and determining its response in axisymmetric loadings is of paramount importance.

^{[5]}The function of flexible pipes with a large deformation requirement in the isolation layer is critical, but the fragility model and consequence functions of such pipes were rarely reported, which hinders the seismic resilience assessment of isolated structures.

^{[6]}Collapse bucking is a typical failure mode of flexible pipes during deepwater service.

^{[7]}The investigated steels were armor wires for flexible pipes.

^{[8]}Large strain deformation theory is used to analyze the effects of high pressure-high temperature two-phase flow on critical velocity in flexible pipes.

^{[9]}In recent years a number of high-profile cases have shown that flexible pipes are particularly susceptible to the aggressive environments occasionally found in deep-water oil and gas exploration.

^{[10]}In this article, we present the elements of a numerical multiscale procedure capable of predicting the stresses that lead to fatigue damage in flexible pipes, namely: a nonlinear beam element, a nonlinear section response model and a detailed finite element model; the consistent integration of models developed for different length scales; and finally a validation of the flexible riser large-scale model.

^{[11]}Diameters and wall thicknesses of flexible pipes are usually designed as per hydraulic requirements, such as flow capacity, internal fluid pressure, and pipe material properties.

^{[12]}The purpose of this study was to analyze the head loss in flexible pipes with laser-perforated orifices, and to estimate the maximum length of laterals based on criteria of water distribution uniformity.

^{[13]}Structural Analysis of Flexible Pipes and Umbilical Cables: a bimaterial Finite Element modeling technique and a novel experimental approach using a Digital Image Correlation system.

^{[14]}Theoretical studies have substantiated a rational correlation of diameters of tubing, columns of flexible pipes and the flow rate of the flushing agent for washing the sand plug in the wells with various flushing agents.

^{[15]}In the structural analysis of flexible pipes, the Finite Element Method (FEM) stands as a powerful and widespread tool.

^{[16]}In addition, some useful suggestions for improving the design of flexible pipes against the armor wires lateral instability failure are presented.

^{[17]}In addition, the fluid–structure interaction of compressible fluid flowing in flexible pipes is also considered.

^{[18]}The present paper addresses armor wire lateral instability in flexible pipes and umbilicals.

^{[19]}A novel generation of irrigation systems was introduced on the basis of hydrophilic, swellable, permeable, soft and flexible pipes using polymeric hydrogels.

^{[20]}This paper proposes a finite element (FE) modal approach to determine the critical loads and buckling mode shapes associated with the lateral buckling of the tensile armors in flexible pipes.

^{[21]}

因此，估计开始屈曲的弯曲循环数有利于防止屈曲失效并扩大柔性管的潜在应用范围。

^{[1]}还有望在不久的将来扩展这项工作的基本思想，通过引入多段铰接管模型来探索输送流体的柔性管道和软管的非线性响应。

^{[2]}挠性管在巴西海上开发中得到了广泛应用，克服不断增加的水深、高压和高污染物流体的挑战始终存在。

^{[3]}随着海上石油和天然气勘探在更深的地方进行，更多柔性管道因坍塌而失效。

^{[4]}柔性管道是海上油气开发的关键要素，确定其在轴对称载荷下的响应至关重要。

^{[5]}大变形要求的柔性管道在隔震层中的功能至关重要，但此类管道的脆性模型和后果函数鲜有报道，阻碍了隔震结构的抗震回弹性评价。

^{[6]}塌陷屈曲是柔性管道在深水服务过程中的典型失效模式。

^{[7]}所研究的钢是用于柔性管的铠装线。

^{[8]}采用大应变变形理论分析高压高温两相流对柔性管临界速度的影响。

^{[9]}近年来，一些备受瞩目的案例表明，柔性管道特别容易受到深水油气勘探中偶尔出现的腐蚀性环境的影响。

^{[10]}在本文中，我们介绍了能够预测导致柔性管疲劳损伤的应力的数值多尺度程序的元素，即：非线性梁单元、非线性截面响应模型和详细的有限元模型；为不同长度尺度开发的模型的一致集成；最后对柔性立管大模型进行了验证。

^{[11]}挠性管的直径和壁厚通常根据液压要求进行设计，例如流量、内部流体压力和管道材料特性。

^{[12]}本研究的目的是分析带有激光穿孔的柔性管的水头损失，并根据配水均匀性的标准估计支管的最大长度。

^{[13]}柔性管道和脐带电缆的结构分析：双材料有限元建模技术和使用数字图像相关系统的新型实验方法。

^{[14]}理论研究证实了油管直径、柔性管柱和各种冲洗剂冲洗井中砂塞的冲洗剂流量之间存在合理的相关性。

^{[15]}在柔性管道的结构分析中，有限元法 (FEM) 是一种强大且广泛使用的工具。

^{[16]}此外，针对铠装线横向失稳失效，提出了一些改进柔性管设计的有益建议。

^{[17]}此外，还考虑了在柔性管道中流动的可压缩流体的流固耦合。

^{[18]}本论文解决了柔性管道和脐带缆中的铠装线横向不稳定性。

^{[19]}新一代灌溉系统是在亲水性、膨胀性、渗透性、柔软性和柔性管道的基础上使用聚合物水凝胶引入的。

^{[20]}本文提出了一种有限元 (FE) 模态方法来确定与柔性管中拉伸装甲的横向屈曲相关的临界载荷和屈曲模态形状。

^{[21]}

## Unbonded Flexible Pipes 未粘合的软管

This paper presents a method to predict the bending hysteretic behavior of unbonded flexible pipes using full layered numerical general finite element models with an implicit solver.^{[1]}Unbonded flexible pipes are widely utilized in the exploitation of offshore oil and gas resources.

^{[2]}An analytical model is proposed to investigate the local torsion and bending behavior of tensile armors in unbonded flexible pipes.

^{[3]}Unbonded flexible pipes have superior fatigue performance as the internal armor layers are allowed to move relative to each other, leading to reduced structural loading.

^{[4]}Unbonded flexible pipes consist of multiple subcomponents which interact through frictional contact.

^{[5]}Unbonded flexible pipes have become widely employed in marine environments with the development of the offshore oil and gas exploration industry.

^{[6]}Three kinds of models based on the same flexible pipe with 8 layers have been separately created to investigate the effects of different modeling approaches on numerical simulation results of finite element (FE) models for unbonded flexible pipes.

^{[7]}

本文提出了一种使用带有隐式求解器的全层数值通用有限元模型来预测未粘合柔性管弯曲滞后行为的方法。

^{[1]}无粘结柔性管道广泛用于海上油气资源的开采。

^{[2]}提出了一种分析模型来研究未粘合柔性管中拉伸装甲的局部扭转和弯曲行为。

^{[3]}未粘合的柔性管具有出色的疲劳性能，因为允许内部装甲层相对移动，从而降低结构载荷。

^{[4]}未粘合的柔性管由多个通过摩擦接触相互作用的子组件组成。

^{[5]}随着近海油气勘探行业的发展，无粘结柔性管在海洋环境中得到广泛应用。

^{[6]}分别建立了基于同一8层柔性管的三种模型，研究了不同建模方法对非粘合柔性管有限元（FE）模型数值模拟结果的影响。

^{[7]}

## Strip Flexible Pipes

Metallic strip flexible pipes (MSFP), a relatively new style of unbonded flexible pipes, are considered as an attractive alternative to traditional submarine pipes.^{[1]}Metallic strip flexible pipes (MSFP), a relatively new style of unbonded flexible pipes, are considered as an attractive alternative to traditional submarine pipes.

^{[2]}Moreover, this work answers a question raised by producers that need to know when tensile armor is required to reinforce Metallic Strip Flexible Pipes (MSFP).

^{[3]}

金属带柔性管 (MSFP) 是一种相对较新的非粘合柔性管，被认为是传统海底管道的有吸引力的替代品。

^{[1]}金属带柔性管 (MSFP) 是一种相对较新的非粘合柔性管，被认为是传统海底管道的有吸引力的替代品。

^{[2]}此外，这项工作回答了生产商提出的一个问题，他们需要知道何时需要拉伸装甲来加固金属带柔性管 (MSFP)。

^{[3]}

## Buried Flexible Pipes

This paper investigates an experimental study on reducing stress acting on buried flexible pipes by using expanded polystyrene (EPS) geofoam techniques.^{[1]}The earthquake shake has a significant impact on the response of buried infrastructures; however, no study has been conducted on the behavior of buried flexible pipes subjected to earthquake shake.

^{[2]}In this study, stress analyses of buried flexible pipes were carried out using a newly designed experimental setup for the method of photoelasticity.

^{[3]}

本文研究了一项通过使用发泡聚苯乙烯 (EPS) 土工泡沫技术降低作用在埋地柔性管道上的应力的实验研究。

^{[1]}地震震动对地下基础设施的响应有显着影响；然而，尚未对埋地柔性管在地震震动下的行为进行研究。

^{[2]}在这项研究中，使用新设计的光弹性方法实验装置对埋地柔性管进行应力分析。

^{[3]}

## Bonded Flexible Pipes

In this paper, a simplified model for erosion in un-bonded flexible pipes caused by the sand entrained in the produced fluid is established.^{[1]}ABSTRACT Fibreglass reinforced flexible pipe (FGRFP) is regarded as a great alternative to bonded flexible pipes in the field of oil or gas transportation.

^{[2]}Marine un-bonded flexible pipes wrapped with fiber-reinforced polymer are essential in offshore oil and gas exploration because of their high flexibility and reliability.

^{[3]}

在本文中，建立了由采出液中夹带的沙子引起的未粘合软管腐蚀的简化模型。

^{[1]}摘要 玻璃纤维增强柔性管（FGRFP）被认为是油气运输领域粘合柔性管的一种很好的替代品。

^{[2]}用纤维增强聚合物包裹的船用非粘合柔性管因其高度的灵活性和可靠性而在海上石油和天然气勘探中必不可少。

^{[3]}

## Two Flexible Pipes

The behaviours of these two flexible pipes were tested using a 3D finite element (FE) model, validated against experimental data from a laboratory investigation.^{[1]}However, when comparing the two flexible pipes in this study, despite no significant differences in cell shape anisotropy were found, a significantly different behaviour for the E modulus ratio was observed.

^{[2]}

使用 3D 有限元 (FE) 模型测试了这两个柔性管道的行为，并根据实验室调查的实验数据进行了验证。

^{[1]}然而，在本研究中比较两种柔性管时，尽管未发现单元形状各向异性的显着差异，但观察到 E 模量比的行为存在显着差异。

^{[2]}

## flexible pipes consist

Tensile armor in flexible pipes consists of two or more layers of steel wires.^{[1]}Unbonded flexible pipes consist of multiple subcomponents which interact through frictional contact.

^{[2]}

柔性管道中的拉伸铠装由两层或多层钢丝组成。

^{[1]}未粘合的柔性管由多个通过摩擦接触相互作用的子组件组成。

^{[2]}

## flexible pipes subjected

The calculation of stress components in tensile armour wires of flexible pipes subjected to combined tension and bending is challenging given the intrinsic geometrical and physical nonlinearities.^{[1]}The earthquake shake has a significant impact on the response of buried infrastructures; however, no study has been conducted on the behavior of buried flexible pipes subjected to earthquake shake.

^{[2]}

考虑到固有的几何和物理非线性，计算承受拉伸和弯曲组合的柔性管的拉伸铠装线中的应力分量具有挑战性。

^{[1]}地震震动对地下基础设施的响应有显着影响；然而，尚未对埋地柔性管在地震震动下的行为进行研究。

^{[2]}