Volume 5A: Pipelines, Risers, and Subsea Systems最新文献_第3页

An Application of Fault Tree Analysis for Decommissioning of Subsea Flexible Pipeline in Brazil 故障树分析在巴西海底柔性管道退役中的应用

Volume 5A: Pipelines, Risers, and Subsea Systems Pub Date : 2019-11-11 DOI: 10.1115/omae2019-96730

Rafael Ramos, I. Pasqualino, M. Souza, E. R. Nicolosi

引用次数: 0

Analytical Methodology to Evaluate Flexible Risers Fatigue Lives at the Top Region 顶区柔性隔水管疲劳寿命评价的分析方法

Volume 5A: Pipelines, Risers, and Subsea Systems Pub Date : 2019-11-11 DOI: 10.1115/omae2019-96372

F. Sousa, M. Q. Siqueira, J. Sousa, G. Campello

{"title":"Analytical Methodology to Evaluate Flexible Risers Fatigue Lives at the Top Region","authors":"F. Sousa, M. Q. Siqueira, J. Sousa, G. Campello","doi":"10.1115/omae2019-96372","DOIUrl":"https://doi.org/10.1115/omae2019-96372","url":null,"abstract":"\u0000 Traditionally, fatigue life calculations are very expensive in terms of time and computer resources. They are usually performed during riser design phases, when several lines with similar characteristics need to be analyzed. While operating, when problems are detected, fatigue analyses are also necessary to help to decide if any action is needed. In both situations, end fittings and bendstiffeners are usually the critical regions. Considering the high number of flexible risers installed in Brazil and the structural complexity of this kind of structure, a robust and fast methodology to evaluate the fatigue life of flexible risers becomes attractive. In this way, this paper proposes a analytical/numerical methodology to evaluate the fatigue life at the top region of flexible pipes. Using the top imposed motions and taking into account the properties of all structures in the riser, it is possible to evaluate tension analytically. Combining tension and the rotations imposed at the top of the riser, curvatures are determined, and stresses can be calculated. Finally, SN curves and the Miner’s rule for damage accumulation allow the estimation of fatigue life. The obtained results indicate that the proposed methodology is conservative when compared to traditional ones. Also, it is very fast, allowing the fatigue life estimation in minutes.","PeriodicalId":190268,"journal":{"name":"Volume 5A: Pipelines, Risers, and Subsea Systems","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-11-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126552410","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Investigation on Mechanical Properties of Fiberglass Reinforced Flexible Pipes Under Bending 玻璃纤维增强柔性管弯曲力学性能研究

Volume 5A: Pipelines, Risers, and Subsea Systems Pub Date : 2019-11-11 DOI: 10.1115/omae2019-95457

Y. Gao, Shan Jin, Peng Cheng, Peihua Han, Yong Bai

引用次数: 2

A Symbolic Regression Formulation to Estimate the Lateral Buckling Resistance of Tensile Armors in Flexible Pipes 一种估计柔性管道中拉伸装甲横向屈曲抗力的符号回归公式

Volume 5A: Pipelines, Risers, and Subsea Systems Pub Date : 2019-11-11 DOI: 10.1115/omae2019-95510

Gabriel M. Gonzalez, J. Sousa, L. Sagrilo, R. R. Martins, Djalene Maria Rocha

引用次数: 0

Non-Linearly Restoring Performance and its Hysteresis Behavior of Dynamic Catenary 动态悬链线的非线性恢复性能及其滞后行为

Volume 5A: Pipelines, Risers, and Subsea Systems Pub Date : 2019-11-11 DOI: 10.1115/omae2019-95651

Yilun Li, Shuang‐Xi Guo, Yue Kong, Min Li, Weimin Chen

{"title":"Non-Linearly Restoring Performance and its Hysteresis Behavior of Dynamic Catenary","authors":"Yilun Li, Shuang‐Xi Guo, Yue Kong, Min Li, Weimin Chen","doi":"10.1115/omae2019-95651","DOIUrl":"https://doi.org/10.1115/omae2019-95651","url":null,"abstract":"\u0000 Catenary is increasingly used as mooring-line and riser system as the water depth gets larger due to its lower cost and easier installment. Its dynamic response and restoring performance become more complicated, as the length of the mooring-line become larger, and the structural and fluid dynamics the mooring-line become consequently more obvious. Compared to the quasi-static method where the static restoring force is mainly involved, the dynamic behaviors and its hysteresis of the catenary mooring-line are considered here so as to comprehensively examine the non-linearly restoring performance of mooring-lines. Based on the 3d dynamic vector equations along with the modified FEM simulations, the hysteresis character of the restoring stiffness and the influences of the catenary dynamics on its restoring performance are presented and discussed.\u0000 It is found that, principally owing to the damping and inertial effect coming from the fluid and structural dynamics, the restoring force of the mooring-line depends on both the structural displacement and velocity. Moreover, the dynamic stiffness behaves as a hysteresis loop, instead of a curve. Our numerical results show that the energy consumption during one period rises nonlinearly with the increase of the body frequency ωd and amplitude A0. And, the influence of nonlinear restoring stiffness on the structural response along with the slack-taut phenomenon caused by structural /hydrodynamic inertia and damping is discussed.","PeriodicalId":190268,"journal":{"name":"Volume 5A: Pipelines, Risers, and Subsea Systems","volume":"87 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-11-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117168663","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Study of the Vortex-Induced Vibration of the Marine Risers With the Buoyancy 海洋隔水管受浮力影响的涡激振动研究

Volume 5A: Pipelines, Risers, and Subsea Systems Pub Date : 2019-11-11 DOI: 10.1115/omae2019-96824

Lin Zhao, H. Su, Yanju Yin

{"title":"Study of the Vortex-Induced Vibration of the Marine Risers With the Buoyancy","authors":"Lin Zhao, H. Su, Yanju Yin","doi":"10.1115/omae2019-96824","DOIUrl":"https://doi.org/10.1115/omae2019-96824","url":null,"abstract":"\u0000 Regarding the very large top tension of ocean deep water riser which is caused by the heavy self-weight, a innovated buoyancy system is designed. This system can effectively decrease the top tension and improve the performance of the riser movement. In order to study the upper and lower part of the floating system, a specialized model test is carried out, where the acceleration, amplitude, frequency and trajectory of the interested points along the risers are investigated. It has been observed that with the increase of the current speed, both the vibration acceleration and the vibration frequency are increasing but the bare riser amplitude is decreasing. At the speed of 0.2m/s, the resonance phenomenon is observed, but the same phenomenon is not observed for the middle floating riser subjecting to different flow velocities. At the speed of 0.4 m/s, the largest amplitude is captured. Due to the response differences of the floating riser at the up and down parts of the middle floating riser, when the amplitude is increasing, the vibration frequency is decreasing, both at cross flow (CF) direction and inline flow (IL) direction. Especially the vibration behavior of the interested points is most influenced by the buoyancy. Under different models, vibration at different flow velocities is presented along bare riser, the modal vibration effects of the floating riser will decrease In addition, according to the experiment condition, Orcaflex is applied to conduct the numerical simulation to get the vibration law of the corresponding feature points and compare it with the experimental results. The results indicate that the numerical analysis reasonably match with experimental results.","PeriodicalId":190268,"journal":{"name":"Volume 5A: Pipelines, Risers, and Subsea Systems","volume":"36 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-11-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126888111","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Analysis of Polyester Reinforced Flexible Composite Pipe Under Internal Pressure 内压作用下聚酯增强柔性复合管的分析

Volume 5A: Pipelines, Risers, and Subsea Systems Pub Date : 2019-11-11 DOI: 10.1115/omae2019-95903

Xinyu Sun, Yong Bai, Xiaojie Zhang, Chang Liu, Jiannan Zhao

{"title":"Analysis of Polyester Reinforced Flexible Composite Pipe Under Internal Pressure","authors":"Xinyu Sun, Yong Bai, Xiaojie Zhang, Chang Liu, Jiannan Zhao","doi":"10.1115/omae2019-95903","DOIUrl":"https://doi.org/10.1115/omae2019-95903","url":null,"abstract":"\u0000 In recent years, petroleum and natural gas industry technology continues to develop, so the market demand for polyester fiber reinforced flexible composite pipe is increasing. Polyester reinforced flexible composite pipe is widely used in practical production, which is based on thermoplastic material and winded by polyester fiber. Based on the anisotropic uniformity of polyester reinforced flexible composite pipes, this paper focuses on the mechanical behavior of flexible composite pipes under internal pressure. By using numerical analysis method, the stress-strain change and burst pressure model of polyester reinforced pipe under internal pressure are established. The short-term burst pressure test is carried out to obtain the burst pressure of the reinforced pipe. The finite element analysis software ABAQUS is used to establish finite element model for simulation analysis. According to the generated test data, the correctness of the finite element analysis results is verified. The sensitivity of winding angle and diameter-thickness ratio to the pressure was studied to further understand the mechanical properties of polyester reinforced composite pipe.","PeriodicalId":190268,"journal":{"name":"Volume 5A: Pipelines, Risers, and Subsea Systems","volume":"612 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-11-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116469922","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Examination and Analysis of Four-Phase Four-Fluid Flow Techniques in Offshore Pipelines 海洋管道四相四流体流动技术的检验与分析

Volume 5A: Pipelines, Risers, and Subsea Systems Pub Date : 2019-11-11 DOI: 10.1115/omae2019-95005

Mohamed Odan, F. B. Rajeb, M. A. Rahman, A. Aborig, S. Imtiaz, Yan Zhang, M. Awad

{"title":"Examination and Analysis of Four-Phase Four-Fluid Flow Techniques in Offshore Pipelines","authors":"Mohamed Odan, F. B. Rajeb, M. A. Rahman, A. Aborig, S. Imtiaz, Yan Zhang, M. Awad","doi":"10.1115/omae2019-95005","DOIUrl":"https://doi.org/10.1115/omae2019-95005","url":null,"abstract":"\u0000 Many offshore drilling sites are plagued by infrastructure break-downs and other issues due to the complexity of the systems required for the subsea extraction of oil and gas (O&G). For the most part, the O&G industry uses multi-phase and multi-component pipeline flows to move their product from one site to another or to different areas of the same site. In extreme environments, such as offshore or Arctic sites, the development of Sand particles along the pipelines can bring additional challenges to the project. The present work examines the practicality of applying a system of four-phase four-fluid flows for transporting a multi-phase flow (sand, water, oil and CO2) along subsea pipelines. As a means for precisely measuring and predicting the characteristics of thermo- and hydro-dynamic multi-component mixtures, models representing phase behavior and hydrate equilibrium are built and tested. Additionally, the study looks at heat transfer, mass and momentum in both the flow and pipe walls and develops equations to describe their interrelationships. Another focus of this work it to investigate four-phase multi-component flow systems in order to obtain a deeper understanding of transient flow in various types of pipes, including conditions around the system of four-phase four-fluid flows, and hydro-dynamic variable effects on flow.","PeriodicalId":190268,"journal":{"name":"Volume 5A: Pipelines, Risers, and Subsea Systems","volume":"20 3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-11-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129276156","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Prediction of Internal Pressure of Flexible Pipe 柔性管内压力的预测

Volume 5A: Pipelines, Risers, and Subsea Systems Pub Date : 2019-11-11 DOI: 10.1115/omae2019-95458

QiangQ. Shao, Ting Liu, Shuai Yuan, Peihua Han, Yong Bai

引用次数: 0

Experimental Study on Friction of Steel Wires of Dynamic Umbilical for Fatigue Life Analysis 动力脐带钢丝摩擦疲劳寿命分析试验研究

Volume 5A: Pipelines, Risers, and Subsea Systems Pub Date : 2019-11-11 DOI: 10.1115/omae2019-96491

Yin Yuanchao, Qingzhen Lu, Wu Shanghua, Jun Yan, Q. Yue, Chen Jinlong

{"title":"Experimental Study on Friction of Steel Wires of Dynamic Umbilical for Fatigue Life Analysis","authors":"Yin Yuanchao, Qingzhen Lu, Wu Shanghua, Jun Yan, Q. Yue, Chen Jinlong","doi":"10.1115/omae2019-96491","DOIUrl":"https://doi.org/10.1115/omae2019-96491","url":null,"abstract":"\u0000 Dynamic umbilicals are widely used in the wet tree development of deep-water field. In the application of dynamic umbilicals, fatigue is a key failure mode which may cause severe economic consequences. The fatigue behavior of dynamic umbilical is complicated by the mechanical properties of the material, the cross-section design and the interaction of different components. Published studies have shown that the interaction friction stress of steel wires is critical for fatigue analysis. Coefficient of friction were used as a constant during the fatigue life analysis. However, the friction stress and the coefficient of friction may change during the wear of the steel wire.\u0000 This paper presents a new experiment method and device to evaluate the change of the coefficient of friction of steel wire. Different cycles of reciprocating wear were carried out on samples to simulate interaction of the steel wires during the process of fatigue. The samples are pairs of steel wires which were cut on a dynamic umbilical. The interaction stress and friction stress were measured during the test. Micro morphology on the surface of steel wire at the contract zone were measured to investigate the wear of the sample.\u0000 The test result shows that the coefficient of friction and stress changes during the test. Worn marks were found on the contact zone of the steel wires. The change of the coefficient of friction may affect the accuracy of fatigue life analysis of dynamic umbilical. Conclusions were also presented on the coefficient of friction test and theoretical calculation method to approach a more accurate fatigue life for dynamic umbilical design.","PeriodicalId":190268,"journal":{"name":"Volume 5A: Pipelines, Risers, and Subsea Systems","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-11-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124665996","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0