Abstract
By focusing on the vulnerability of the structure of marine equipments, together with considering the randomness of meta-ocean load in statistics, a kind of analytical method of fatigue characteristics of marine structure based on full-scale and actual measurement of prototype is proposed. On the basis of short-term field measurement results of structural response, research is carried out on the fatigue analysis of hinge joints at the upper part of the Soft Yoke single point Mooring System (SYMS) by simultaneously monitoring the environmental load and considering the design criteria of offshore structure. Through analysis of finite element modeling, the time-histories of typical stress response are obtained, and then the assessment of fatigue damage at key hinge joints is conducted. The simulation results indicate that the proposed method can accurately analyze the fatigue damage of offshore engineering structure caused by the effect of wave load. The present analytical method of fatigue characteristics can be extended on other offshore engineering structures subjected to meta-ocean load.
Similar content being viewed by others
References
Fan, M., 1992. Analysis of SPM system with soft yoke, China Offshore Oil and Gas (Engineering), 4(1), 29–33. (in Chinese)
Fan, Z.L., Yue, Q.J., Wu, W.H., Sun, Q. and Sun, Y., 2014. Prototype measurement methods for horizontal mooring force of soft yoke mooring system, Journal of Shanghai Jiaotong University, 48(4), 475–487. (in Chinese)
Günther, F.C., Florian, S. and Daniel, T., 2009. Motion behavior of a new offshore LNG transfer system at harsh operational conditions, Proceedings of the 28th International Conference on Offshore Mechanics and Arctic Engineering (OMAE2009), Honolulu, Hawaii, USA.
Liu, Y.G., Wen, B.G. and Zhang, C.B., 1994. Dynamic analysis model for fixed type mooring system, China Offshore Oil and Gas (Engineering), 6(4), 7–11. (in Chinese)
Mamoun, N., Walter, M. and Jean-Pierre, Q., 2005. Passive disconnection of an SPM-moored LNG carrier in waves, Proceedings of the 24th International Conference on Offshore Mechanics and Arctic Engineering (OMAE2005), Halkidiki, Greece.
Subrata, K.C., 2005. Handbook of Offshore Engineering (I-II), Elsevier Science Ltd.
SIMULIA, 2013. Abaqus Analysis User’s Manual (6.13).
Wu, W.H., Wang, Y.L., Tang, D., Yue, Q.J., Du, Y., Fan, Z.L., Lin, Y. and Zhang, Y.T., 2016. Design, implementation and analysis of full coupled monitoring system of FPSO with soft yoke mooring system, Ocean Eng., 113, 255–263.
Xiao, L.F., Tao, L.B., Yang, J.M. and Li, X., 2014. An experimental investigation on wave runup along the broadside of a single point moored FPSO exposed to oblique waves, Ocean Eng., 88, 81–90.
Xiao, L.F., Yang, L.J. and Yang, J.M., 2008. Numerical prediction on horizontal restoring characteristics of soft yoke mooring system, Ocean Eng., 26(1), 24–30.
Author information
Authors and Affiliations
Corresponding author
Additional information
Foundation item: this work was financially supported by the National Natural Science Foundation of China (Grant No. 15572072), and the National Key Basic Research and Development Program (Grant Nos. 2014CB046803 and 2016ZX05028-002-005).
Rights and permissions
About this article
Cite this article
Wu, Wh., Lv, Bc., Yue, Qj. et al. Research on analytical method of fatigue characteristics of Soft Yoke Mooring System based on full-scale measurement. China Ocean Eng 31, 230–237 (2017). https://doi.org/10.1007/s13344-017-0027-0
Received:
Revised:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1007/s13344-017-0027-0