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 Subsea pipeline connects the two lands to transport liquids, gases, etc.; in generally, the pipeline is laid on the seabed and the water pressure would cause corrosion, whether or not corrosion of the pipeline is safe, it is necessary for professional judgment.In this paper, we first consider the strength types that pipelines may be damaged. We use an ANSYS modeling to simulate corrosion defects in a single case by a different width or depth and understand the stress effects. To generate random numbers by MATLAB, a 3D curve surface with the random numbers is created and exported to IGES files by AUTOCAD VBA program. Next, it is modeling by CATIA and stress analysis by ANSYS. There are single rectangular, spherical defects, two defects each other affect to investigate stress analysis.
 目錄目錄 I圖目錄 III表目錄 VII符號表 VIII第一章 前言 11.1 研究動機 11.2 文獻回顧 21.3 研究方法 3第二章 序論 52.1 最大剪應力破壞理論 52.2 最大主應力破壞理論 62.3 最大畸變能理論 62.4 元素選擇Solid45 7第三章 理論分析 93.1 單一的缺陷評估 113.2 缺陷深度4.775mm分析 153.3 不同徑向長度缺陷比較分析 213.4 不同深度比較分析 28第四章 隨機亂數分析 344.1 長方形缺陷 344.2 球型缺陷 40第五章 相互作用形狀缺陷 505.1 相互作用缺陷評估 505.2 相互作用缺陷驗證 565.3 相互作用亂數缺陷 60第六章 結論與未來展望 64參考文獻 66
 [1]DNV, Recommended Practice DNV RP-F101 Corroded Pipelines, DetNorske Veritas, Norway, 2004.[2]ASME Code For Pressure Piping, B31 Liquid Petroleum Transportation Piping Systems, ASME B31.4 - 1989 Edition.[3]API 579(2000),Recommended Practice For Fitness-For-Service, ISSUE6,2000[4]Mario S.G. Chiodo, Claudio Ruggieri, Failure assessments of corroded pipelines with axial defects using stress-based criteria: Numerical studies and verification analyses, International Journal of Pressure Vessels and Piping, Volume 86, Issues 2–3, February–March 2009, Pages 164–176[5]J. L. Alamilla , J. Oliveros & J. García-Vargas (2009): Probabilistic modelling of a corroded pressurized pipeline at inspection time, Structure and Infrastructure Engineering: Maintenance, Management, Life-Cycle Design and Performance, 5:2, 91-104[6]Weiwei Yu, Pedro M. Vargas and Dale G. Karr, Bending Capacity Analyses of Corroded Pipeline, Journal of Offshore Mechanics and Arctic Engineering, Volume 134, Issue 2, Piper and Riser Technology[7]J.B Choi, B.K Goo, J.C Kim, Y.J Kim, W.S Kim, Development of limit load solutions for corroded gas pipelines, International Journal of Pressure Vessels and Piping, Volume 80, Issue 2, February 2003, Pages 121–128[8]M. Ahammed, Prediction of remaining strength of corroded pressurised pipelines, International Journal of Pressure Vessels and Piping, Volume 71, Issue 3, May 1997, Pages 213–217[9]Spotts ,Shoup ,Hornberger。民95。機械元件設計(吳家祥等譯)。台北縣：高立圖書有限公司。[10]劉啟台力學教室, http://sunrise.hk.edu.tw/~hmliu/1-lct/material/ch6/ch6_1.htm[11]ANSYS, Ansys12.0 Help[12]2007 Development of Computational Tools for Automatic Modeling and FE Analysis of Corroded Pipelines
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