Abstract
The real-time computer-controlled actuators are used to connect the truncated parts of moorings and risers in the active hybrid model testing system. This must be able to work in model-scale real time, based on feedback input from the floater motions. Thus, mooring line dynamics and damping effects are artificially simulated in real time, based on a computer-based model of the problem. In consideration of the nonlinear characteristics of the sea platform catenary mooring line, the equations of the mooring line motion are formulated by using the lumped-mass method and the dynamic response of several points on the mooring line is investigated by the time and frequency domain analysis method. The dynamic response of the representative point on the mooring line is analyzed under the condition of two different corresponding upper endpoint movements namely sine wave excitation and random wave excitation. The corresponding laws of the dynamic response between the equivalent water depth truncated points at different locations and the upper endpoint are obtained, which can provide technical support for further study of the active hybrid model test.
This is a preview of subscription content, log in via an institution to check access.
Similar content being viewed by others
References
Chai, Y.T., Varyani, K.S. and Barltrop, N.D.P., 2002. Three-dimensional lump-mass formulation of a catenary riser with bending, torsion and irregular seabed interaction effect, Ocean Eng., 29(12), 1503–1525.
Chen, X., Zhang, J. and Ma, W., 1999. Coupled time-domain analysis of the response of a spar and its mooring system, Proceedings of the 9th International Offshore and Polar Engineering Conference, International Society of Offshore and Polar Engineers, 293–300.
Cozijn, J.L. and Bunnik, T.H.J., 2004. Coupled mooring analysis for a deep water calm buoy, Proceedings of the 23rd International Conference on Offshore Mechanics and Arctic Engineering, Vancouver, Canada, 1–11.
Fan, T.H., Qiao, D.S. and Ou, J.P., 2015. Optimized design of deepwater catenary mooring system in equivalent truncated water depth, Journal of Ship Mechanics, (5), 518–525. (in Chinese)
Garrett, D.L., 1982. Dynamic analysis of slender rods, Journal of Energy Resources Technology, 104(4), 302–306.
Guo, C., 2012. Contrastive analysis on calculation theories of catenary and parabolic cable, Shanxi Architecture, 38(3), 173–176. (in Chinese)
Huang, X.L. and Lu, X.S., 1992. Marine Engineering Fluid Mechanics and Structure Dynamic Response, Shanghai Jiaotong University Press, Shanghai. (in Chinese)
Li, Q.P., 2006. The situation and challenges for deepwater oil and gas exploration and exploitation in China, China Offshore Oil and Gas, 18(2), 130–133. (in Chinese)
Miao, G.P., 1995. Introduction of Flexible Components Dynamics, Shanghai Jiaotong University Press, Shanghai. (in Chinese)
Nakajima, T., Motora, S. and Fujino, M., 1982. On the dynamic analysis of multi-component mooring lines, Annual Offshore Technology Conference, Houston, Texas.
Raman, N.W. and Baddour, R.E., 2003. Three-dimensional dynamics of a flexible marine riser undergoing large elastic deformations, Multibody System Dynamics, 10, 393–423.
Shen, Y., Guan, Y.F. and Pan, Y.P., 2015. Research on mooring cables’ dynamic analysis for LFS, Ship Science and Technology, 37(11), 49–53. (in Chinese)
Stansberg, C.T., Ormberg, H. and Oritsland, O., 2002. Challenges in deep water experiments: hybrid approach, Journal of Offshore Mechanics and Arctic Engineering, 124, 90–96.
Tang, Y.G., Zhang, R.Y. and Cheng, N., 2009. Analysis of snap tension of deep water mooring with lumped mass method, Journal of Tianjin University: Natural Science and Engineering Technology, 42(8), 695–701. (in Chinese)
Tang, Y.G., Zhang, R.Y. and Zhuang, Z., 2010. Modal analysis of mooring system in deep sea, Engineering Mechanics, 27(1), 233–239. (in Chinese)
Wang, B., Luo, Z. and Zhu, G.B., 2012. Method to calculate the length of the catenary for anchored vessel, Ship Science and Technology, 34(11), 52–54, 107. (in Chinese)
Wang, H.W., Luo, Y. and Ma, G., 2015. Dynamic characteristics of deepwater truncated taut mooring system with nonlinear springs, Journal of Huazhong University of Science and Technology: Natural Science Edition, (7), 124–128. (in Chinese)
Xiao, Y., 2006. Non-Linear Time-Domain Analysis and Calculation for Moored Systems, Ph. D. Thesis, Dalian University of Technology. (in Chinese)
Xiao, Y. and Wang, Y.Y., 2005. Time-domain analysis for 3-d mooring system, Journal of Ship Mechanics, 9(5), 8–16. (in Chinese)
Yang, J.M. and Xiao, L.F. and Sheng, Z. B., 2008. Ocean Engineering Hydrodynamics Testing Research, Shanghai Jiaotong University Press, Shanghai. (in Chinese)
Yu, Y.X., 2000. Random Wave and Its Applications to Engineering, Dalian University of Technology Press, Dalian. (in Chinese)
Zhang, X. and Wang, T.S., 2007. Computational Dynamics, Tsinghua University Press, Beijing. (in Chinese)
Acknowledgements
This research was supported by the State Key Laboratory of Satellite Ocean Environment Dynamics (Second Institute of Oceanography, SOA) (Grant No. SOED1706).
Author information
Authors and Affiliations
Corresponding author
Additional information
Foundation item: This work was financially supported by the Natural Science Foundation of Zhejiang Province (Grant Nos. Y14E090034 and Y13F020140), the Young Scientist Training Program in Zhejiang Province (Grant No. 2013R60G7160040), the State Key Laboratory of Ocean Engineering of Shanghai Jiao Tong University for the Open Fund Project (Grant No. 1516), and the Open Fund Project of Second Institute of Oceanography (Grant No. SOED1706).
Rights and permissions
About this article
Cite this article
Zhang, Hm., Kong, Lb., Guan, Wb. et al. Dynamic response analysis of the equivalent water depth truncated point of the catenary mooring line. China Ocean Eng 31, 37–47 (2017). https://doi.org/10.1007/s13344-017-0005-6
Received:
Revised:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1007/s13344-017-0005-6