Volume 5A: Pipelines, Risers, and Subsea Systems最新文献_第2页

Analysis of Mechanical Properties of Carbon Fiber Reinforced Spiral Rod in Umbilical 碳纤维增强脐带螺旋杆的力学性能分析

Volume 5A: Pipelines, Risers, and Subsea Systems Pub Date : 2019-11-11 DOI: 10.1115/omae2019-95988

Yu Zhang, N. Cheng, Yi Zhao, Peng Zhang

引用次数: 0

Active Control of Flexible Riser Vibration by Boundary Control Based on LQR Controller 基于LQR控制器的柔性隔水管振动边界主动控制

Volume 5A: Pipelines, Risers, and Subsea Systems Pub Date : 2019-11-11 DOI: 10.1115/omae2019-95839

Jinxin Yu, Weimin Chen

{"title":"Active Control of Flexible Riser Vibration by Boundary Control Based on LQR Controller","authors":"Jinxin Yu, Weimin Chen","doi":"10.1115/omae2019-95839","DOIUrl":"https://doi.org/10.1115/omae2019-95839","url":null,"abstract":"\u0000 The lateral displacement and the rotational angle of marine riser are likely to get larger as it is in stronger ocean current and, particularly, undergoes the consequences such as vortex-induced vibration or collisions between individual risers. The riser vibration with large amplitude value will lead to fatigue or coating damage of the structural body. In this study, the active vibration control, in terms of its angle and the displacement reductions, of a flexible riser under time-varying distributed load are considered using boundary control. The governing equations of the structural dynamics involving the control system of a flexible riser are built. The riser is modeled as an Euler-Bernoulli beam under the actions of ocean loads and the feedback controller. A torque actuator is introduced at the upper riser boundary, and the control law is employed to generate the required signal for riser angle control and displacement reduction. The feed-back control law is designed in state space, and the optimization of the control law is implemented based on the LQR approach. The linear quadratic regulator is used to determine the gain matrix, which can calculate the boundary control law by solving the Recatti equation. Based on the numerical simulations, the responses of the open-loop system and closed-loop system are presented and compared. The effectiveness of the vibration suppression of the flexible riser is examined.","PeriodicalId":190268,"journal":{"name":"Volume 5A: Pipelines, Risers, and Subsea Systems","volume":"29 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":"127874164","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: 3

Recent Advances in the Prediction and Mitigation of Flow Induced Pulsations in Flexible Risers and Flowlines 柔性立管和管线中流致脉动的预测与缓解研究进展

Volume 5A: Pipelines, Risers, and Subsea Systems Pub Date : 2019-11-11 DOI: 10.1115/OMAE2019-95906

S. Belfroid, N. González Díez, H. Korst

{"title":"Recent Advances in the Prediction and Mitigation of Flow Induced Pulsations in Flexible Risers and Flowlines","authors":"S. Belfroid, N. González Díez, H. Korst","doi":"10.1115/OMAE2019-95906","DOIUrl":"https://doi.org/10.1115/OMAE2019-95906","url":null,"abstract":"\u0000 Flow-induced pulsations in flexible risers and flowlines (FLIP) has been the subject of ongoing research roughly over the last two decades. This phenomenon, also called singing, can cause high vibration and cyclic stress levels in the attached up- and downstream pipe systems, thereby imposing serious limitations on the flowrates through the pipes. FLIP occurs when the flow velocity along the flexible is above a certain onset flow velocity. Large pressure pulsations can appear as a result of a feedback loop mechanism established between vortex shedding at the inner cavities and longitudinal acoustic standing waves. Since FLIP is recommended to be avoided in all cases, the main focus of the research has been to understand the phenomenon and build models to predict the onset velocity. An overview of the experiences in the behavior and prediction of onset data on a large number of field cases is given. Recent advances on the theory and prediction of the onset and behavior of flow induced pulsations are discussed. This ranges from new advanced test methods for acoustic source allocation to full large scale experiments. In addition, new and upcoming anti-FLIP technologies as well as possible mitigation actions available to operators are discussed, by introducing recent field experiences as well as large scale tests.","PeriodicalId":190268,"journal":{"name":"Volume 5A: Pipelines, Risers, and Subsea Systems","volume":"1 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":"129295738","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

A Study of Hydrate Inhibition for Deepwater Gas Field Development 深水气田开发水合物抑制作用研究

Volume 5A: Pipelines, Risers, and Subsea Systems Pub Date : 2019-11-11 DOI: 10.1115/omae2019-95177

Yi Hualei, Yun Hao, Xiaohong Zhou

{"title":"A Study of Hydrate Inhibition for Deepwater Gas Field Development","authors":"Yi Hualei, Yun Hao, Xiaohong Zhou","doi":"10.1115/omae2019-95177","DOIUrl":"https://doi.org/10.1115/omae2019-95177","url":null,"abstract":"\u0000 For deepwater subsea tie-back gas field development, hydrate tends to be formed in deepwater subsea production system and gas pipeline due to high pressure and low temperature. Based on the gas field A development, this paper studies the selection of hydrate inhibitors and injection points, i.e. different injection points with different inhibitors. Transient and steady flow simulations are performed using the OLGA software widely used for multiphase flow pipeline study in the world. The produced water flow rate affects the hydrate inhibition in case of well opening, including cases of different times with different water temperatures. This paper presents the calculation of the maximum inhibitor injection rate in the subsea pipeline by taking the whole production years into consideration. The measures on hydrate remediation are taken by quickly relieving the subsea pipeline pressure from wellheads and the platform according to different hydrate locations. Now more and more deepwater gas fields are developed in South China Sea and around the world. The experience obtained from the gas field A development will benefit the hydrate inhibition for future deepwater gas field development.","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":"125261649","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

Study on Mechanical Behavior of Tensile Armor Wires of Marine Flexible Pipes and Cables During Winding Process 船用软管电缆抗拉护套钢丝缠绕过程力学行为研究

Volume 5A: Pipelines, Risers, and Subsea Systems Pub Date : 2019-11-11 DOI: 10.1115/omae2019-95426

Qingzhen Lu, Wu Shanghua, Wang Dong, Yang Zhixun, Yin Yuanchao, Hu Haitao, Jun Yan, Q. Yue

引用次数: 2

Extreme and Fatigue Analysis of a Dynamic Subsea Power Umbilical 海底动力脐带缆的极限疲劳分析

Volume 5A: Pipelines, Risers, and Subsea Systems Pub Date : 2019-11-11 DOI: 10.1115/omae2019-95123

Q. Yan, Guo Hong, Z. Lei, Yuan Zhenqin, Li Juyue

引用次数: 1

A Three-Dimensional FE Approach for the Stress Analysis of Tensile Armors Inside End Fittings 张拉装甲内端件应力分析的三维有限元方法

Volume 5A: Pipelines, Risers, and Subsea Systems Pub Date : 2019-11-11 DOI: 10.1115/omae2019-95506

M. Miyazaki, J. Sousa, G. Ellwanger

{"title":"A Three-Dimensional FE Approach for the Stress Analysis of Tensile Armors Inside End Fittings","authors":"M. Miyazaki, J. Sousa, G. Ellwanger","doi":"10.1115/omae2019-95506","DOIUrl":"https://doi.org/10.1115/omae2019-95506","url":null,"abstract":"\u0000 In this work, a solid three-dimensional finite element (FE) approach is proposed to investigate the stress distribution along the tensile armors of flexible pipes inside their end fittings (EFs). This approach employs two different models. The first model consists of a single tensile armor, which is meshed with solid FEs, and a rigid surface that represents the EF. A toroidal template is also considered and the EF mounting process is simulated. In the second model, the deformed armor and the stress state from the first model are considered and the voids between the armor and the EF are filled with resin, which is also modeled with solid FEs. Geometric and material nonlinearities are addressed and the interaction between the different components are ensured with contact elements. A case study is conducted to observe the stress distribution along the tensile armor considering typical operational loads. The results obtained are compared to those calculated with a previously proposed analytical model showing good agreement, but also evidencing the need to adequately simulate the EF mounting process and the pre-operational tests. Moreover, intense stress concentrations at the entrance of the EF are observed thus indicating that this region can be critical in fatigue analyses.","PeriodicalId":190268,"journal":{"name":"Volume 5A: Pipelines, Risers, and Subsea Systems","volume":"21 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":"115281970","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

Section Translational Movement Imposition for Macroelements 大元素的截面平移运动拼装

Volume 5A: Pipelines, Risers, and Subsea Systems Pub Date : 2019-11-11 DOI: 10.1115/omae2019-95033

Rodrigo Provasi, C. Martins

{"title":"Section Translational Movement Imposition for Macroelements","authors":"Rodrigo Provasi, C. Martins","doi":"10.1115/omae2019-95033","DOIUrl":"https://doi.org/10.1115/omae2019-95033","url":null,"abstract":"\u0000 Boundary conditions play a very important role in any mathematical model. They heavily influence the response near the region they are, but the farther the interest region is, the less important the boundary condition influence becomes. Also, the response depends of which movements are constrained or imposed and which are not. This influence can be seen in all type of problems, ranging from simple beams to complicated structures.\u0000 For tubular structures, such as flexible pipes and umbilical cables, the boundary conditions are usually given in terms of imposed movements in sections, which are commonly assumed, by hypothesis, as rigid bodies. To deal with this type of structures, the authors presented in previous works the macroelements. They are finite elements that incorporate geometrical characteristics in the formulation, leading to well behaved contact models with a smaller number of degrees of freedom.\u0000 One major feature of the model is the orthotropic cylindrical layer that uses Fourier series for the displacements. This led to specific contact models and bring the difficulty in the representation of boundary conditions in terminal sections, since different nature displacements (one the aforementioned Fourier and other one standard description) must be dealt with.\u0000 This paper address how to impose translational movement for sections using macroelements. All the description of how the coupling is made and the constraint enforcement done by using a penalty-based formulation. This work also highlights the implementation, finalizing with comparison with a conventional finite element program.","PeriodicalId":190268,"journal":{"name":"Volume 5A: Pipelines, Risers, and Subsea Systems","volume":"29 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":"115336230","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

Frequency Domain Fatigue Analysis for a Unbonded Flexible Riser: Damage Induced by Dynamic Tension 无粘结柔性隔水管频域疲劳分析:动态张力损伤

Volume 5A: Pipelines, Risers, and Subsea Systems Pub Date : 2019-11-11 DOI: 10.1115/omae2019-95118

Jiabei Yuan, Yucheng Hou, Z. Tan

{"title":"Frequency Domain Fatigue Analysis for a Unbonded Flexible Riser: Damage Induced by Dynamic Tension","authors":"Jiabei Yuan, Yucheng Hou, Z. Tan","doi":"10.1115/omae2019-95118","DOIUrl":"https://doi.org/10.1115/omae2019-95118","url":null,"abstract":"\u0000 Evaluation of fatigue damage of offshore flexible risers is critical in flexible riser system design. For deepwater application, irregular wave time domain approach is often adopted as the state of practice to avoid excessive conservatism due to its better representation of the stochastic offshore environment. The approach can indeed fully capture the non-linear behaviors of the system at a significant cost of computational time. For example, computational time typically takes over 3∼4 weeks for a deep water free hanging riser system with thousands of fatigue load-cases and the full 3-hour simulations. On the other hand, the same scope of simulation can be completed in frequency domain within day(s), which will enable the designer to accelerate the optimization of riser system design. This paper presents an analysis method in frequency domain for assessing the fatigue damage of tensile armour wires inside the top end fitting (EF), which is induced by dynamic tension variation and often governs the riser service life in deep water applications. A validation measurement is also implemented to ensure the accuracy and practicability of this frequency domain approach in riser system design.","PeriodicalId":190268,"journal":{"name":"Volume 5A: Pipelines, Risers, and Subsea Systems","volume":"25 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":"127675097","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

Numerical Simulation of the Fluid-Solid Two-Phase in the Horizontal Pipe Based on DEM-CFD Coupling Method 基于DEM-CFD耦合方法的水平管内流固两相数值模拟

Volume 5A: Pipelines, Risers, and Subsea Systems Pub Date : 2019-11-11 DOI: 10.1115/omae2019-95455

Jinshan Pu, Yongping Chen, P. Yao

引用次数: 1