Hydrodynamic interactions between side-by-side offloading FLNG and LNGC under different wave directions

被引：0
|
作者：
Zhou K. [1 ,2 ]
Hu Z. [3 ]
Zhao D. [1 ,2 ]
机构：
[1] State Key Laboratory of Ocean Engineering (Shanghai Jiao Tong University), Shanghai
[2] Collaborative Innovation Center for Advanced Ship and Deep-Sea Exploration, Shanghai
[3] School of Engineering, Newcastle University, Newcastle upon Tyne
来源：
Harbin Gongye Daxue Xuebao/Journal of Harbin Institute of Technology | 2018年 / 50卷 / 08期
关键词：
Damping-lid method; FLNG; Model test; Shielding effect; Side-by-side;
D O I：
10.11918/j.issn.0367-6234.201707024
中图分类号：
学科分类号：
摘要：
When the side-by-side offloading operation is carried out between FLNG and LNGC, strong hydrodynamic interactions will be induced by the two hulls. The weather vane effect of single point mooring system has attracted most focuses on the analysis of side-by-side configuration in head waves. Nevertheless, the influence of oblique waves on the motion responses of the side-by-side system cannot be ignored. This article investigates the hydrodynamic responses of the side-by-side system through theoretical analysis method and model testing method. Based on the 3-D potential theory and artificial damping-lid method applied on the gap surface between two vessels, the gap water resonance and linear hydrodynamic performances of side-by-side FLNG and LNGC are studied under oblique and head waves. Middle-field method is adopted to calculate the second-order hydrodynamic parameters, and reveal the influence of wave directions on the mean drift forces of both vessels. Investigation shows that the change of wave directions within a certain range does not influence the value selection of the free surface damping, while imposes influence on the mode and amplitude of gap water resonance. The variation of wave directions affects the shielding effect between FLNG and LNGC, and the motion responses of LNGC are greatly suppressed by FLNG under oblique waves. Besides, the main components of mean drift forces on the two vessels change accordingly under different wave directions. © 2018, Editorial Board of Journal of Harbin Institute of Technology. All right reserved.
引用
收藏
页码：114 / 123
页数：9
相关论文
共 18 条
  • [1] Ohkusu M., On the heaving motion of two circular cylinders on the surface of a fluid, Reports of Research Institute for Applied Mechanics, 17, 58, pp. 167-185, (1969)
  • [2] Van Oortmerssen G., Hydrodynamic interaction between two structures floating in waves, Proceedings of the 2nd International Conference on Behavior of Offshore Structures (BOSS'79), pp. 339-356, (1979)
  • [3] Choi Y.R., Hong S.Y., An analysis of hydrodynamic interaction of floating multi-body using higher-order boundary element method, Proceedings of the 12th International Offshore and Polar Engineering Conference, pp. 303-308, (2002)
  • [4] Hong S.Y., Kim J.H., Cho S.K., Et al., Numerical and experimental study on hydrodynamic interaction of side-by-side moored multiple vessels, Ocean Engineering, 32, 7, pp. 783-801, (2005)
  • [5] Xu X., Li X., Yang J.M., Hydrodynamic interactions of three barges in close proximity in a floatover installation, China Ocean Engineering, 30, 3, pp. 343-358, (2016)
  • [6] Pessoa J., Fonseca N., Guedes Soares C., Numerical study of the coupled motion responses in waves of side-by-side LNG floating systems, Applied Ocean Research, 51, pp. 350-366, (2015)
  • [7] Huijsmans R., Pinkster J.A., De Wilde J., Diffraction and radiation of waves around side-by-side moored vessels, Proceedings of the 11th International Offshore and Polar Engineering Conference, pp. 406-412, (2001)
  • [8] Newman J.N., Progress in wave load computations on offshore structures, Proceedings of the 23rd International Conference Offshore Mechanics & Arctic Engineering, pp. 20-25, (2004)
  • [9] Chen X.B., Offshore hydrodynamics and applications, Ies Journal Part a Civil & Structural Engineering, 4, 3, pp. 124-142, (2011)
  • [10] Fang M.C., Chen G.R., The relative motion and wave elevation between two ships advancing in waves, International Shipbuilding Progress, 49, 3, pp. 177-194, (2002)
12