International Journal of Naval Architecture and Ocean Engineering

The Society of Naval Architects of Korea (대한조선학회)
권호 표지
DOI QR코드

DOI QR Code

Experimental study on the asymmetric impact loads and hydroelastic responses of a very large container ship

  • Lin, Yuan (State Key Laboratory of Ocean Engineering, Shanghai Jiao Tong University) ;
  • Ma, Ning (State Key Laboratory of Ocean Engineering, Shanghai Jiao Tong University) ;
  • Gu, Xiechong (State Key Laboratory of Ocean Engineering, Shanghai Jiao Tong University) ;
  • Wang, Deyu (State Key Laboratory of Ocean Engineering, Shanghai Jiao Tong University)
  • Received : 2019.04.14
  • Accepted : 2019.09.30
  • Published : 2020.12.31
Download PDF
⟨ Previous Next ⟩

Abstract

This paper presents an experimental investigation of asymmetric impact effects on hydroelastic responses. A 1:64 scaled segmented ship model with U-shape open cross-section backbone was newly designed to meet elastic similarity conditions of vertical, horizontal and torsional stiffness simultaneously. Different wave heading angles and wavelengths were adopted in regular wave test. In head wave condition, parametric rolling phenomena happened along with asymmetric slamming forces, the relationship between them was disclosed at first time. The impact forces on starboard and port sides showed alternating asymmetric periodic changes. In oblique wave condition, nonlinear springing and whipping responses were found. Since slamming phenomena occurred, high-frequency bending moments became an important part in total bending moments and whipping responses were found in small wavelength. The wavelength and head angle are varied to elucidate the relationship of springing/whipping loads and asymmetric impact. The distributions of peaks of horizontal and torsional loads show highly asymmetric property.

Keywords

Acknowledgement

This study is supported by the China Ministry of Education Key Research Project "KSHIP-II Project" (Knowledge-based Ship Design Hyper Integrated Platform) No. GKZY010004. Authors are also grateful to Mr. Jiajun Hu, Mr. Nan Zhao, Mr. Yanchao Geng and Mr. Hailong Si of China Ship Scientific Research Center (CSSRC) for their help in the model tests.

References

  1. Alagan Chella, M., Torum, A., Myrhaug, D., 2012. An overview of wave impact forces on offshore wind turbine substructures. Energy Procedia 20, 217-226. https://doi.org/10.1016/j.egypro.2012.03.022
  2. Chen, Z., Jiao, J., Li, H., 2017. Time-domain numerical and segmented ship model experimental analyses of hydroelastic responses of a large container ship in oblique regular waves. Appl. Ocean Res. 67, 78-93. https://doi.org/10.1016/j.apor.2017.07.005
  3. Ding, J., Wang, X.L., Hu, J.J., Liu, R.M., 2015. Experimental investigations of springing and slamming responses of an ultra-VLCC. J. Ship Mech. 19 (1-2), 144-151.
  4. Drummen, I., Wu, M.K., Moan, T., 2009. Experimental and numerical study of containership responses in severe head seas. Mar. Struct. 22 (2), 172-193. https://doi.org/10.1016/j.marstruc.2008.08.003
  5. Faltinsen, O.M., 1993. Sea Loads on Ships and Offshore Structures. Cambridge University Press.
  6. Faltinsen, O.M., 2005. Hydrodynamics of High-Speed Marine Vehicles. Cambridge University Press.
  7. Hong, S.Y., Kim, B.W., 2014. Experimental investigations of higher-order springing and whipping-WILS project. Int. J. Naval Architect. Ocean Eng. 6 (4), 1160-1181. https://doi.org/10.2478/IJNAOE-2013-0237
  8. Hong, S.Y., Kim, B.W., Nam, B.W., 2012. Experimental study on torsion springing and whipping of a large container ship. Int. J. Offshore Polar Eng. 22 (2), 97-107.
  9. Hong, S.Y., Kim, K.H., Kim, B.W., 2015. An experimental investigation on bow slamming loads on an ultra-large container ship. In: 7th International Conference on Hydroelasticity in Marine Technology, Split, Croatia, pp. 229-244.
  10. Houtani, H., Komoriyama, Y., Matsui, S., Oka, M., Sawada, H., Tanaka, Y., Tanizawa, K., 2018. Designing a hydro-structural model ship to experimentally measure its vertical-bending and torsional vibrations. In: 8th International Conference on Hydroelasticity in Marine Technology, Seoul, Korea, pp. 53-62.
  11. Iijima, K., Hermundstad, O.A., Zhu, S., Moan, T., 2009. Symmetric and antisymmetric vibrations of hydroelastically scaled model. In: The 5th International Conference on Hydroelasticity in Marine Technology, Southampton, UK, pp. 173-182.
  12. ITTC, 2017. Report of the seakeeping committee. In: The 28th International Towing Tank Conference, Wuxi, China.
  13. Jiao, J., Ren, H., Sun, S., Liu, N., Li, H., Adenya, C.A., 2016. A state of the art large scale model testing technique for ship hydrodynamics at sea. Ocean Eng. 123, 174-190. https://doi.org/10.1016/j.oceaneng.2016.06.028
  14. Jiao, J., Ren, H., Adenya, C.A., Chen, C., 2017. Development of a shipboard remote control and telemetry experimental system for large-scale model's motions and loads measurement in realistic sea waves. Sensors 17 (11), 1-26, 2485. https://doi.org/10.1109/JSEN.2016.2633501
  15. Jiao, J., Sun, S., Li, J., Adenya, C.A., Ren, H., Chen, C., Wang, D., 2018. A comprehensive study on the seakeeping performance of high speed hybrid ships by 2.5d theoretical calculation and different scaled model experiments. Ocean Eng. 160, 197-223. https://doi.org/10.1016/j.oceaneng.2018.04.051
  16. Jiao, J., Chen, Z., Chen, C., Ren, H., 2019a. Time-domain hydroelastic analysis of nonlinear motions and loads on a large bow flare ship in high irregular seas. J. Mar. Sci. Technol. 1-29. https://doi.org/10.1007/s00773-019-00652-1.
  17. Jiao, J., Chen, C., Ren, H., 2019b. A comprehensive study on ship motion and load responses in short-crested irregular waves. Int. J. Naval Architect. Ocean Eng. 11(1), 364-379. https://doi.org/10.1016/j.ijnaoe.2018.07.003
  18. Jiao, J., Yu, H., Chen, C., Ren, H., 2019c. Time-domain numerical and segmented model experimental study on ship hydroelastic responses and whipping loads in harsh irregular seaways. Ocean Eng. 185, 59-81. https://doi.org/10.1016/j.oceaneng.2019.05.039
  19. Kim, J.H., Kim, Y., 2015. Parametric study of numerical prediction of slamming and whipping and an experimental validation for a 10,000-TEU containership. In: Proceedings of the Twenty-Fifth International Ocean and Polar Engineering Conference, Hawaii, USA, pp. 96-103.
  20. Li, H., 2009. 3-D Hydroelasticity Analysis Method for Wave Loads of Ship. Ph.D. thesis. Harbin Engineering University, China.
  21. Liu, J., 2005. Structural Dynamics. China Marine Press, pp. 46-48.
  22. Maron, A., Kapsenberg, G., 2014. Design of a ship model for hydroelastic experiments in waves. Int. J. Naval Architect. Ocean Eng. 6, 1130-1147. https://doi.org/10.2478/IJNAOE-2013-0235
  23. Rajendran, S., Guedes Soares, C., 2016. Numerical investigation of the vertical response of a containership in large amplitude waves. Ocean Eng. 123, 440-451. https://doi.org/10.1016/j.oceaneng.2016.06.039
  24. Remy, F., Molin, B., Ledoux, A., 2006. Experimental and numerical study of wave response of a flexible barge. In: The 4th International Conference on Hydroelasticity in Marine Technology, Wuxi, China, pp. 255-264.
  25. Semenov, Y.A., Iafrati, A., 2006. On the nonlinear water entry problem of asymmetric wedges. J. Fluid Mech. 547 (547), 231-256. https://doi.org/10.1017/S0022112005007329
  26. Senjanoviꠑc, I., Vladimir, N., Cho, D.S., 2012. Application of 1D FEM & 3D BEM hydroelastic model for stress concentration assessment in large container ships. Brodogradnja 63 (4), 307-317.
  27. Wang, S., Guedes Soares, C., 2014. Asymmetrical water impact of two-dimensional wedges with roll angle with multi-material eulerian formulation. Int. J. Maritime Eng. 156 (A2), 115-130.
  28. Wang, S., Guedes Soares, C., 2016. Experimental and numerical study of the slamming load on the bow of a chemical tanker in irregular waves. Ocean Eng. 111, 369-383. https://doi.org/10.1016/j.oceaneng.2015.11.012
  29. Xu, G.D., Duan, W.Y., Wu, G.X., 2008. Numerical simulation of oblique water entry of an asymmetrical wedge. Ocean Eng. 35 (16), 1597-1603. https://doi.org/10.1016/j.oceaneng.2008.08.002
  30. Zhao, N., Hu, J., Li, Z., Wang, X., 2017. Design of open backbone of segmented model for wave load experiment. Ship Ocean Eng. 46 (4), 7-11.
  31. Zhu, S., Wu, M.K., Moan, T., 2011. Experimental investigation of hull girder vibrations of a flexible backbone model in bending and torsion. Appl. Ocean Res. 33(4), 252-274. https://doi.org/10.1016/j.apor.2011.08.001

Cited by

  1. Slamming and green water loads on a ship sailing in regular waves predicted by a coupled CFD-FEA approach vol.241, 2020, https://doi.org/10.1016/j.oceaneng.2021.110107
  2. Nonlinear bending moments of an ultra large container ship in extreme waves based on a segmented model test vol.243, 2022, https://doi.org/10.1016/j.oceaneng.2021.110335