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Volume 20, Issue 43 (6-2024)                   Marine Engineering 2024, 20(43): 55-69 | Back to browse issues page

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Azizi F, kazemi S, Azarsina F. Numerical Analysis of Catenary and Taut Mooring System Combination Effects on Heave and Pitch Motion Responses of a Semi-submersible Offshore Platform. Marine Engineering 2024; 20 (43) :55-69
URL: http://marine-eng.ir/article-1-1120-en.html
Numerical Analysis of Catenary and Taut Mooring System Combination Effects on Heave and Pitch Motion Responses of a Semi-submersible Offshore Platform
Farshid Azizi1 , Saeid Kazemi * 1, Farhood Azarsina1
1- Department of Engineering, Faculty of Technical and Engineering, Science and Research Branch, Islamic Azad University
Abstract:   (479 Views)
In this article, the role of moorings in the heave and pitch movements of the semi-submersible platform is investigated due to the increasing use of these platforms in deep waters. Improper movements of the platforms can cause instability of the structure and disrupt its performance. In order to analyze the movements of the platform, taking into account the role of moorings, the numerical simulation of Amir-kabir platform with different mooring modes has been performed as a nonlinear analysis in the time domain using Orca-flex software. By examining 52 different mooring compound models in three stages, 5 mooring compound models have been introduced in terms of the motion response of the semi-submersible platform in the heave and pitch. The results show that the independent combination of catenary and tensile moorings, in addition to the overall reduction of the length of the moorings, causes optimal behavior in the heave and pitch movements of the semi-submersible platform.
Keywords: Catenary &, Taut mooring, Semi-submersible platform, Optimization platform motion response
Full-Text [PDF 1643 kb]   (102 Downloads)    
Type of Study: Research Paper | Subject: Offshore Structure
Received: 2024/07/13 | Accepted: 2024/08/29
References
1. Ma, K. T., Luo, Y., Kwan, C. T. T., & Wu, Y. (2019). Mooring system engineering for offshore structures. Gulf Professional Publishing.
2. Karlsson, D., & Forser, M. (2015). Structural analysis of node cut-outs in a semi-submersible offshore platform. Master's Thesis in the International Master's Programme Naval Architecture and Ocean Engineering.
3. Lee, J., Kwon, O., Kim, I., Kim, G., & Lee, J. (2019). Cyclic pullout behavior of helical anchors for offshore floating structures under inclined loading condition. Applied Ocean Research, 92, 101937. [DOI:10.1016/j.apor.2019.101937]
4. Wang, R. (2016). Design of mooring systems in extreme seastates with focus on viscous drift force modelling (Master's thesis, NTNU).
5. Hermawan, Y. A., & Furukawa, Y. (2020). Coupled three-dimensional dynamics model of multi-component mooring line for motion analysis of floating offshore structure. Ocean Engineering, 200, 106928.‌ [DOI:10.1016/j.oceaneng.2020.106928]
6. Feng, A., Kang, H. S., Zhao, B., & Jiang, Z. (2020). Two-Dimensional Numerical Modelling of a Moored Floating Body under Sloping Seabed Conditions. Journal of Marine Science and Engineering, 8(6), 389. [DOI:10.3390/jmse8060389]
7. Trubat, P., Molins, C., & Gironella, X. (2020). Wave hydrodynamic forces over mooring lines on floating offshore wind turbines. Ocean Engineering, 195, 106730. [DOI:10.1016/j.oceaneng.2019.106730]
8. MacCamy, R. C., & Fuchs, R. A. (1954). Wave forces on piles. A Diffraction Theory. Washington DC. Crops of Engineers.
9. Zhang, Z. L., Yuan, H. T., Sun, S. L., & Ren, H. L. (2021). Hydrodynamic characteristics of a fixed semi-submersible platform interacting with incident waves by fully nonlinear method. International Journal of Naval Architecture and Ocean Engineering, 13, 526-544. [DOI:10.1016/j.ijnaoe.2021.06.003]
10. Mazarakos, T., & Tsaousis, T. (2024). Hydrodynamic Loads on a Semi-Submersible Platform Supporting a Wind Turbine Under a Mooring System With Buoys. Polish Maritime Research, 31(1), 24-34. [DOI:10.2478/pomr-2024-0003]
11. Larsen, K. (2015). Fatigue Analysis and Design of Mooring Systems. Assessment and comparison of different methods (Master's thesis, NTNU).
12. Jonkman, J. M. (2007). Dynamics modeling and loads analysis of an offshore floating wind turbine. University of Colorado at Boulder (Book). [DOI:10.2172/921803] [PMID]
13. Eslahi, M. J., Ezam, M., & Ghodsi Hassanabad, M. (2023). Numerical Study on Heave Plate Effects on Hydrodynamic Responses of Floating Offshore Wind Turbines. Journal Of Marine Engineering, 19(41), 119-133.
14. Zerwer, A., Cascante, G., & Hutchinson, J. (2002). Parameter estimation in finite element simulations of Rayleigh waves. Journal of geotechnical and geoenvironmental engineering, 128(3), 250-261. [DOI:10.1061/(ASCE)1090-0241(2002)128:3(250)]
15. Sarpkaya, T., Experimental Determination of the Critical Reynolds Number for Pulsating Poiseuille Flow, Trans. ASMED, J. Basic Engng, Vol. 88 (1966). [DOI:10.1115/1.3645920]
16. Schulz, K. W., & Kallinderis, Y. (2000). Three-dimensional numerical prediction of the hydrodynamic loads and motions of offshore structures. J. Offshore Mech. Arct. Eng., 122(4), 294-300. [DOI:10.1115/1.1320440]
17. Johansson, P. I. (1976). A finite element model for dynamic analysis of mooring cables (Doctoral dissertation, Massachusetts Institute of Technology).
18. Palomo, M. (2017). Describing Reality: Bernoulli's Challenge of the Catenary Curve and its Mathematical Description by Leibniz and Huygens. The Dialogue Between Sciences, Philosophy and Engineering: New Historical and Epistemological Insights. Homage to Gottfried W. Leibniz and 1646-2016, 334.
19. Faltinsen, O. (1993). Sea loads on ships and offshore structures (Vol. 1). Cambridge university press. [DOI:10.4043/7142-MS] [PMID] []
20. Wu, Y., Wang, T., Eide, Ø., & Haverty, K. (2015). Governing factors and locations of fatigue damage on mooring lines of floating structures. Ocean Engineering, 96, 109-124. [DOI:10.1016/j.oceaneng.2014.12.036]
21. Krolikowski, L. P., & Gay, T. A. (1980, May). An improved linearization technique for frequency domain riser analysis. In Offshore Technology Conference (pp. OTC-3777). OTC. [DOI:10.4043/3777-MS] [PMID]
22. Vander Velde, W. E. (1968). Multiple-input describing functions and nonlinear system design. McGraw-hill Book Company.
23. Sabziyan, H., Ghassemi, H., Azarsina, F., & Kazemi, S. (2015). Appropriate model for mooring pattern of a semi-submersible platform. Journal of Subsea and Offshore-Science and Engineering, 1(1), 18-25.
24. Rashidi, J.,Ahmadi ,A.,Seif, M., & Azarsina, F. (2015, May). The effect of different bracing patterns on the behavior of semi-submersible platform. The 6th International Conference of Offshore Industries, Sharif University of Technology. (In Persian)
25. Mohseni, A. S., & Mostafa, G. B. A. (2012). The effect of heave plates on hydrodynamic behavior of Amir Kabir semi-submesible platform. The 10th international conference of coasts, ports and marine structures in Tehran. (In Persian)
26. Dardel, M., & Ghafari, H. (2018). Effects of Buoy size on the frequency and time response in catenary mooring system of the semi-submersible platform. Modares Mechanical Engineering, 18(2), 209-218.23
27. Aamo, O. M., & Fossen, T. I. (2000). Finite element modelling of mooring lines. Mathematics and computers in simulation, 53(4-6), 415-422. [DOI:10.1016/S0378-4754(00)00235-4]
28. DNV GL. (2017). SESAM Theory Manual-DeepC Deep Water Coupled Floater Motion Analysis, Version 5.2-02.
29. Ormberg, H., Fylling, I. J., Larsen, K., & Soedahl, N. (1997, April). Coupled analysis of vessel motions and mooring and riser system dynamics. In proceedings of the international conference on offshore mechanics and arctic (pp. 91-100). American Society of Mechanical Engineers.
30. API RP 2SK, Recommended Practice for Design and Analysis of Stationkeeping Systems for Floating Structures, third ed., American
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