Dissertation > Excellent graduate degree dissertation topics show

S-lay Installation Analysis for Deepwater Pipeline

Author: ZhuLiYun
Tutor: BaiYong
School: Harbin Engineering University
Course: Design and manufacture of ships and marine structures
Keywords: deepwater subsea pipeline s-lay pipe-laying ABAQUS finite element Matlab numerical iteration
CLC: TE973
Type: Master's thesis
Year: 2011
Downloads: 40
Quote: 0
Read: Download Dissertation


With the steady development of deepwater oil and gas exploitation, the subsea pipeline, as marine "lifeline", plays a more and more important role in this field. In different kinds of subsea pipeline projects, the construction design always proves to be a difficult point. Therefore, in order to keep abreast with the world’s deepwater oil and gas industry, the deepwater pipeline installation technology is indispensable for China’s offshore industry development. Although, for the time being, many domestic entrepreneurs and universities have performed widespread researches and studies, there are still many problems waiting to be solved due to the complexity of this technology itself.In our country, at the earlier stages of subsea pipeline installation, the towing methods are widely adopted; however, with the continual increase of water depth, many of the subsea pipelines are now installed by pipe-laying vessel method. In different kinds of pipe-laying methods, the S-lay method is greatly preferred. Especially with the birth of dynamic positioning S-lay vessel, this method can install subsea pipelines into deep areas with several kilometers water depth.First, this thesis, based on the widespread reading of relevant domestic and overseas s-lay references, has earnestly summarized the latest progress of domestic and overseas oil/gas exploitation and s-lay analysis. Then almost every kind of subsea pipeline installation method has been introduced in great detail, including their installation style, advantages arid disadvantages and scope of application. Besides, several deepwater s-lay numerical calculation methods have been detailedly presented.Second, this thesis has broken the over-dependence of OFFPIPE software for pipeline installation in industry and a case study of 600 meter subsea pipeline s-lay installation has been performed by the author for the first time, which includes the pipeline model creation, load steps definition, boundary conditions application and the concerned results extraction. In the case study, model creation and boundary conditions are realized by using ABAQUS/CAE, however, the current and wave loads should be applied in AQUA module by editing the.inp file. Moreover, by basing some reasonable model simplifications, this case study has derived almost all of the concerned results for static pipeline s-lay installation analysis, includes the pipeline s-shape configuration, the stress and strain distribution, the moment distribution and the tensioner tension etc., which are quite approximate the real s-lay configuration. The accuracy of these results is verified by another Matlab numerical iteration method in chapter four.Third, in order to verify the correctness of the case study results for the deepwater pipeline s-lay installation by ABAQUS, another novel Matlab numerical iteration model is adopted to perform the same case study. The originality of this method is comprehensively combine several previous s-lay theoretical research achievements to successfully finish the deepwater pipeline s-lay installation case study analysis, which include the theory of using the knowledge of material mechanics to calculate the moment, stress and strain in pipeline by assuming the overband pipe section to be an ideal circular arc, using the theoretical expressions proposed by Gu Yongning to calculation the curvature of the short pipeline section below the lift-off point, using the natural catenary method to approximately calculate the relationship between the tension and curvature in the sagband pipeline section, and using the elementary beam method to calculate the pipeline section from the touch-down point to the seabed part. The results derived from the Matlab numerical iteration method are quite close to that of by ABAQUS method, and the error of many key results are no more than 5%, which dramatically proves the accuracy of the calculating results by adopting the general finite element method.Finally, after the case study, some sensitivity analyses have been preformed with respect to the key parameters for deepwater s-lay method to obtain the loading characteristics and variation principles and to derive some meaningful conclusions for directing real projects. Finally, the development of domestic deepwater pipeline isntallation has been prospected in this thesis.

Related Dissertations

  1. Differential Settlement Control Criterion of Bridge-Approach and People-Vehicle-Road Interaction,U445.71
  2. Study on Different Forms of Vertical Reinforcement in Deep Excavated Pit in Soft-clay Area,TU476
  3. Experiment Study of Steel-Concrete Composite Beam Bridge Crack Width and Control Technique,U445.7
  4. Three-dimensional Non-linear Finite Element Analysis of the Pile-Group Effect for Large-diameter and Super-long Pile-Group Foundation,U443.154
  5. Study on Compacting Effect of Fluid State Concreting for Bored Pile,TU473.14
  6. Research on Air Spring of Low-Frequency and High-Load,U463.334.2
  7. The Study of Landslide Stability and Optimization for Anti-sliding Piles Based on ABAQUS,TU43
  8. Research on Several Problems of Arched Corrugated Steel Roof,TU391
  9. Finite Element Analysis of Process Power-Spinning for Cylindrical Part,TG376
  10. Single expandable casing expansion Mechanism,TE21
  11. The Research on the Distributing of Temperature Field about Cutting Area in Plunge Milling Ti Alloy,TG54
  12. Research on Pneumatic Muscle and Its Application in Pneumatic-mechanical and Pneumatic-hydraulic Composite Transmission,TH112
  13. FEA of Bird-Impact on Aircraft Wind-Shield Based on ABAQUS and Experiment Study,V215
  14. Research on Transition Section between the Ballasted Track and Ballastless Track on Subgrade of High-speed Railway,U213.1
  15. Rainfall Infiltration of Non-saturated Slope Safety Impact,TU43
  16. Static Analysis and Optimization Design of Covered Type of Sheet Pile Wharf,U656.112
  17. The Pore-forming Mechanism Study of Cam Bit on Percussive-Rotary Extruding DTH Drilling,P634.5
  18. Mechanical Response Analysis on CRCP under Temperature Gradient, Moisture Gradient and Vehicle Load,U416.216.2
  19. Study on the Effectiveness of Monitoring Asphalt Mixture’s Strain Response Based on Fiber Optic Sensing Technology,U416.217
  20. Steel frame with steel damper damping properties,TU352.1

CLC: > Industrial Technology > Oil and gas industry > Oil machinery and equipment and automation > Oil and gas storage and transportation machinery and equipment > Oil and gas pipelines
© 2012 www.DissertationTopic.Net  Mobile