Skip to main content
SpringerLink
Log in

A direct coupling analysis method and its application to the Scientific Research and Demonstration Platform

  • Special Column on the Progress in the Verification of Key Technologies for Floating Structures Near Islands and Reefs-First Part (Guest Editors You-Sheng Wu, Jun Ding)
  • Published:
Journal of Hydrodynamics Aims and scope Submit manuscript

Abstract

Design of a very large floating structure (VLFS) deployed near islands and reefs, different from those in the open sea, inevitably faces new technical challenges including numerical analysis methods. In this paper, a direct coupling analysis method (DCAM) has been established based on the Boussinesq equations and the three-dimensional hydroelasisity theory with Rankine source method to analyze the responses of a VLFS in shallow sea with complicated geographical environment. Model tests have been carried out to validate the DCAM. To further verify the numerical methods and investigate the performance of such a VLFS, a “Scientific Research and Demonstration Platform (SRDP)” was built and deployed in 2019 at the site about 1 000 m off an island with water depth around 40m in South China Sea. It is a simplified small model of a two-module semi-submersible-type VLFS. The numerical simulation of its responses on severe waves with focus on motions and connector forces is conduct by DCAM, and compared with the on-site measurements. Good agreement has been achieved. This approves the DCAM as a feasible tool for design and safety assessment of a VLFS deployed near islands and reefs.

This is a preview of subscription content, log in via an institution to check access.

Access this article

Log in via an institution

Price excludes VAT (USA)
Tax calculation will be finalised during checkout.

Instant access to the full article PDF.

Institutional subscriptions

Similar content being viewed by others

References

  1. Wu Y. S., Gu X. K., Liu S. X. et al. Advances of basic research on the responses and safety of very large floating structures in complicated environment [J]. China Basic Science, 2017, 19(4): 28–44.

    Google Scholar 

  2. Bishop R. E. D., Price W. G. Hydroelasticity of ships [M]. Cambridge, UK: Cambridge University Press, 1979.

    Google Scholar 

  3. Wu Y. Hydroelasticity of floating bodies [D]. Doctoral Thesis, London, UK: Brunel University, 1984.

    Google Scholar 

  4. Price W. G., Temarel P., Wu Y. Structural responses of a SWATH of multi-hulled vessel traveling in waves [C]. International Conference on SWATH Ships and Advanced Multi-Hulled Vessels, RINA, London, UK, 1985.

    Google Scholar 

  5. Wu M., Moan T. Linear and nonlinear hydroelastic analysis of high-speed vessels [J]. Journal of Ship Research, 1996, 40(2): 149–163.

    Article  Google Scholar 

  6. Xia J., Wang Z., Jensen J. J. Non-linear wave loads and ship responses by a time-domain strip theory [J]. Marine Structures, 1998, 11(3): 101–123.

    Article  Google Scholar 

  7. Wu Y. S., Kinoshita T. The second order hydrodynamic actions on a flexible body [J]. Seisan-Kenkyu, Institute of Industrial Science of University of Tokyo, 1997, 49(4): 8–19.

    Google Scholar 

  8. Chen X., Wu Y., Cui W. et al. Non-linear hydroelastic analysis of a moored floating body [J]. Ocean Engineering, 2003, 30(8): 965–1003.

    Article  Google Scholar 

  9. Chen X., Moan T., Fu S. et al. Second-order hydroelastic analysis of a floating plate in multidirectional irregular waves [J]. International Journal of Non-Linear Mechanics, 2006, 41(10):1206–1218.

    Article  Google Scholar 

  10. Tian C. Study on the theory and applications of nonlinear hydroelasticity of ships with forward speed [D]. Doctoral Thesis, Shanghai, China: Shanghai Jiao Tong University, 2006 (in Chinese).

    Google Scholar 

  11. Hu J. J., Wu Y. S., Tian C. et al. Hydroelastic analysis and model tests on the structural responses and fatigue behaviors of an ultra-large ore carrier in waves [J]. Proceedings of the Institution of Mechanical Engineers Part M Journal of Engineering for the Maritime Environment, 2012, 226(2):135–155.

    Article  Google Scholar 

  12. Malenica S., Senjanovic I., Vladimir N. Hydro structural issues in the design of ultra large container ships [J]. Brodogradnja, 2013, 64(3): 323–345.

    Google Scholar 

  13. Lee K H., Lee P. S. Nonlinear hydrostatic analysis of flexible floating structures [J]. Applied Ocean Research, 2016, 59: 165–182.

    Article  Google Scholar 

  14. Yang P. 3D nonlinear hydroelastic responses study of ships in time domain [D]. Doctoral Thesis, Wuxi, China: China Ship Scientific Research Center, 2016 (in Chinese).

    Google Scholar 

  15. Loukogeorgaki E., Michailides C., Angelides D. Hydroelastic analysis of a flexible mat-shaped floating breakwater under oblique wave action [J]. Journal of Fluids and Structures, 2012, 31: 103–124.

    Article  Google Scholar 

  16. Michailides C., Loukogeorgaki E., Angelides D. C. Response analysis and optimum configuration of a modular floating structure with flexible connectors [J]. Applied Ocean Research, 2013, 43: 112–130.

    Article  Google Scholar 

  17. Belibassakis K. A., Athanassoulis G. A. A coupled-mode model for the hydroelastic analysis of large floating bodies over variable bathymetry regions [J]. Journal of Fluid Mechanics, 2015, 531: 221–249.

    Article  MathSciNet  Google Scholar 

  18. Wu Y. S., Zou M. S., Tian C. et al. Theory and applications of coupled fluid-structure interactions of ships in waves and ocean acoustic environment [J]. Journal of Hydrodynamics, 2016, 28(6): 923–936.

    Article  Google Scholar 

  19. Ding J., Tian C., Wu Y. S. et al. A simplified method to estimate the hydroelastic responses of VLFS in the inhomogeneous waves [J]. Ocean Engineering, 2019, 172: 434–445.

    Article  Google Scholar 

  20. Riggs H. R., Ertekin R. C., Mills T. R. J. A comparative study of RMFC and FEA models for the wave-induced response of a MOB [J]. Marine Structures, 2000, 13: 217–232.

    Article  Google Scholar 

  21. Senjanović I., Vladimir N., Tomić M. et al. Global hydroelastic analysis of ultra large container ships by improved beam structural model [J]. International Journal of Naval Architecture and Ocean Engineering, 2014, 6(4): 1041–1063.

    Article  Google Scholar 

  22. Wei W., Fu S., Torgeir M. et al. A time-domain method for hydroelasticity of very large floating structures in inhomogeneous sea conditions [J]. Marine Structures, 2018, 57: 180–192.

    Article  Google Scholar 

  23. Wu Y., Ding J., Li Z. et al. Hydroelastic responses of VLFS deployed near islands and reefs [C]. Proceeding of the 36th International Conference on Ocean, Offshore, and Arctic Engineering, Trondheim, Norway, 2017.

  24. Ding J., Tian C., Wu Y. S. et al. Hydroelastic analysis and model tests of a single module VLFS deployed near islands and reefs [J]. Ocean Engineering, 2017, 144: 224–234.

    Article  Google Scholar 

  25. Wu Y. S., Ding J., Tian C. et al. Numerical analysis and model tests of a three-module VLFS deployed near islands and reefs [J]. Journal of Ocean Engineering and Marine Energy, 2018, 4(2): 111–122.

    Article  Google Scholar 

  26. Ding J., Wu Y. S., Zhou Y. et al. A direct coupling analysis method of hydroelastic responses of VLFS in complicated ocean geographical environment [J]. Journal of Hydrodynamics, 2019, 31(2): 774–781.

    Google Scholar 

  27. Wu Y. S., Ding J., Gu X K. et al. The Progress in the verification of key technologies for floating structures near islands and reefs [C]. The 30th International Society of Offshore and Polar Engineering Conference, Shanghai, China, 2020.

  28. Wei G., Kirby J. Time-dependent numerical code for extended Boussinesq equations [J]. Journal of Waterway, Port, Coastal and Ocean Engineering, 1995, 121(5): 251–261.

    Article  Google Scholar 

  29. Wei G., Kirby J. T., Grilli S. T. et al. A fully nonlinear Boussinesq model for surface waves. Part I. Highly nonlinear unsteady waves [J]. Journal of Fluid Mechanics, 1995, 294: 71–92.

    Article  MathSciNet  Google Scholar 

  30. Wang D. Y., Wu Y. S. Three dimensional hydroelastic analysis in time domain with application to an elastic ship model [J]. Journal of Hydrodynamics, 1998, 10(4): 54–61.

    MATH  Google Scholar 

  31. Clement A. H. Coupling of two absorbing boundary conditions for 2D time-domain simulations of free surface gravity waves [J]. Journals of Computational Physics, 1996, 126(1):139–151.

    Article  Google Scholar 

  32. THAFTS Development Group. The software of three-dimensional hydroelastic analyses of floating traveling structures THAFTS and NTHAFTS-theories and user’s manual [R]. Wuxi, China: China Ship Scientific Research Center, 2011.

    Google Scholar 

  33. Ding J., Miao Y. J., Zhang Z. W. et al. Investigation of motions and connector forces for a new type of two-module semi-submersible [J]. Journal of Ship Mechanics, 2020, 24(8): 1036–1046 (in Chinese).

    Google Scholar 

Download references

Acknowledgments

This work was supported by the National Key Research and Development Program of China (Grant No. 2017YFB0202701), the Jiangsu Province Science Foundation for Youths (BK20190151). The authors gratefully acknowledge the contributions to this paper from Xue-kang Gu, Chao Tian, Xiao-ming Cheng, Ye Lu, Ming-gang Tang, Xiao-long Liu, Kai Zhang of CSSRC, and Dao-lin Xu of Hunan University.

Author information

Authors and Affiliations

  1. China Ship Scientific Research Center, Wuxi, 214082, China

    Jun Ding, You-sheng Wu, Xin-yun Ni, Qi-bin Wang, Yu-chao Chen, Yong-lin Ye, Xin-yu Zhang & Wei-nan Yang

  2. State Key Laboratory of Coastal and Offshore Engineering, Dalian University of Technology, Dalian, 116024, China

    Yu-xiang Ma

Authors
  1. Jun Ding
    View author publications

    You can also search for this author in PubMed Google Scholar

  2. You-sheng Wu
    View author publications

    You can also search for this author in PubMed Google Scholar

  3. Xin-yun Ni
    View author publications

    You can also search for this author in PubMed Google Scholar

  4. Qi-bin Wang
    View author publications

    You can also search for this author in PubMed Google Scholar

  5. Yu-chao Chen
    View author publications

    You can also search for this author in PubMed Google Scholar

  6. Yong-lin Ye
    View author publications

    You can also search for this author in PubMed Google Scholar

  7. Xin-yu Zhang
    View author publications

    You can also search for this author in PubMed Google Scholar

  8. Yu-xiang Ma
    View author publications

    You can also search for this author in PubMed Google Scholar

  9. Wei-nan Yang
    View author publications

    You can also search for this author in PubMed Google Scholar

Corresponding author

Correspondence to Jun Ding.

Additional information

Project supported by the Ministry of Industry and Information Technology (Grant Nos. [2016]22, [2019]357), the Ministry of Science and Technology (Grant No. 2013CB36102).

Biography

Jun Ding (1986-), Male, Ph. D., Senior Engineer

Rights and permissions

Reprints and permissions

About this article

Check for updates. Verify currency and authenticity via CrossMark

Cite this article

Ding, J., Wu, Ys., Ni, Xy. et al. A direct coupling analysis method and its application to the Scientific Research and Demonstration Platform. J Hydrodyn 33, 13–23 (2021). https://doi.org/10.1007/s42241-021-0009-9

Download citation

  • Received:

  • Revised:

  • Accepted:

  • Published:

  • Issue Date:

  • DOI: https://doi.org/10.1007/s42241-021-0009-9

Key words

Search

Navigation