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Time domain calculation of connector loads of a very large floating structure

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Abstract

Loads generated after an air crash, ship collision, and other accidents may destroy very large floating structures (VLFSs) and create additional connector loads. In this study, the combined effects of ship collision and wave loads are considered to establish motion differential equations for a multi-body VLFS. A time domain calculation method is proposed to calculate the connector load of the VLFS in waves. The Longuet–Higgins model is employed to simulate the stochastic wave load. Fluid force and hydrodynamic coefficient are obtained with DNV Sesam software. The motion differential equation is calculated by applying the time domain method when the frequency domain hydrodynamic coefficient is converted into the memory function of the motion differential equation of the time domain. As a result of the combined action of wave and impact loads, high-frequency oscillation is observed in the time history curve of the connector load. At wave directions of 0° and 75°, the regularities of the time history curves of the connector loads in different directions are similar and the connector loads of C1 and C2 in the X direction are the largest. The oscillation load is observed in the connector in the Y direction at a wave direction of 75° and not at 0°. This paper presents a time domain calculation method of connector load to provide a certain reference function for the future development of Chinese VLFS

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References

  • Ding W, Yu L, Li RP, Yao MW (2005). Experimental research on dynamic responses of mobile offshore base connector. The Ocean Engineering, 23 (2), 11–15. (in Chinese) DOI: 10.3969/j.issn.1005-9865.2005.02.002

    Google Scholar 

  • Du S, Ertekin RC (1991). Dynamic response analysis of a flexibly joined-multi-module very large floating structure. Proceedings of Oceans '91, IEEE, Honolulu, USA, 1286–1293.

    Google Scholar 

  • Edwards MJ, David R (1999). Non-linear time-domain response of connected mobile offshore base unit using linear frequency domain hydrodynamic forces. Proceedings of the Third International Workshop on Very Large Floating Structure. Honolulu, Hawaii, USA, 155–161.

    Google Scholar 

  • Endo H (2000). The behavior of a VLFS and an airplane during takeoff/landing run in wave condition. Marine Structures, 13(4-5), 477–491. DOI: 10.1016/S0951-8339(00)00020-4

    Article  Google Scholar 

  • Fujikubo M (2005). Structural analysis for the design of VLFS. Marine Structures, 18(2), 201–226. DOI: 10.1016/j.marstruc.2005.07.005

    Article  Google Scholar 

  • Guan YF, Yuan YB, Gu JY (2011). Influence of ship collision on connector loads of MOB. Shipbuilding of China, 52(4), 177–185. (in Chinese) DOI: 10.3969/j.issn.1000-4882.2011.04.020

    Google Scholar 

  • Hamamoto T, Fujita K (1995). Three-dimensional BEM-FEM coupled dynamic analysis of module-linked large floating structures. Proc 5th Int Offshore Polar Eng Conf, Hague, Netherlands, 3, 392.

    Google Scholar 

  • Hamamoto T, Hayashi T, Fujita K (1996). 3D BEM-FEM coupled hydroelastic analysis of irregular shaped module-linked large floating structures. Proc 6th Int Offshore Polar Eng, Conf, Los Angeles, USA, 1, 362–369.

    Google Scholar 

  • Kashiwagi M (2000). A time-domain mode-expansion method for calculating transient elastic responses of a pontoon-type VLFS. Journal of Marine Science and Technology, 5(2), 89–100. DOI: 10.1007/PL00010631

    Article  Google Scholar 

  • Kashiwagi M, Higashimachi N (2003). Numerical simulations of transient responses of VLFS during landing and take-off of an airplane. Proc Int Symp Ocean Space Utilisation Technol, National Maritime Research Institute, Tokyo, Japan, 83–91.

    Google Scholar 

  • Kim D, Chen L, Blaszkowshi Z, Ray J (1999). Linear frequency domain hydroelastic analysis for McDermon’s mobile offshore base using WAMIT. Proceedings of the Third International Workshop on Very Large Floating Structure. Honoluu, Hawaii, USA, 105–133.

    Google Scholar 

  • Riggs HR, Ertekin RC, Mills TRJ (1998a). Impact of connector stiffness on the response of a multi-module mobile offshore base. Proceeding the International Offshore and Polar Engineer Conference, Montréal, Canada, 1, ISOPE, 200–207.

    Google Scholar 

  • Riggs HR, Ertekin RC, Mills TRJ (1998b). Wave-induced response of a 5-module mobile offshore base. 17th International Conference on Offshore Mechanics and Arctic Engineering, Lisbon, Portugal, OMAE98-4440.

    Google Scholar 

  • Riggs HR, Ertekin RC, Mills TRJ (1999). Characteristics of the wave response of mobile offshore bases. Proceeding 18th International Conference on Offshore Mechanics and Arctic Engineering, Saint John’s, Canada, 1–9.

    Google Scholar 

  • Riggs HR, Ertekin RC (1999). Response characteristics of serially connected semisubmersibles. Journal of Ship Research, 43(4), 229–240.

    Google Scholar 

  • Riggs HR, Ertekin RC (1993). Approximate methods for dynamic response of multi-module floating structures. Marine Structures, 6(2-3), 117–141. DOI: 10.1016/0951-8339(93)90016-V

    Article  Google Scholar 

  • Riggs HR, Ertekin RC, Mills TRJ (2000). A comparative study of RMFC and FEA models for the wave-induced response of a MOB. Marine Structures, 13(4-5), 217–232. DOI: 10.1016/S0951-8339(00)00029-0

    Article  Google Scholar 

  • Shu Z, Li RP, Wang ZJ (2002). A study on the motion of very large floating structure in waves. China Offshore Platform, 17(3), 1–5. (in Chinese) DOI: 10.3969/j.issn.1001-4500.2002.03.001

    Google Scholar 

  • Wang DY, Riggs HR, Eriekin RC (1991). Three-dimensional hydroelastic response of a very large floating structure. Offshore and Polar Engrg., 1(4), 307–316.

    Google Scholar 

  • Watanabe E, Utsunomiya T (1996). Transient response analysis of a VLFS at airplane landing. Proc IntWorkshopon Very Large Floating Structures, Hayama, Kanagawa, Japan, 243–7.

    Google Scholar 

  • Watanabe E, Utsunomiya T, Tanigaki S (1998). A transient response analysis of a very large floating structure by finite element method. Structural Engrg/Earthquake Engrg, JSCE, 15(2), 155–163.

    Google Scholar 

  • Wu CF, Mills TRJ (1996). Wave induced connector loads and connector design for the mobile offshore base. Proceeding of the Second International Workshop on Very Large Floating Structure, Hayama, Japan, 387–392.

    Google Scholar 

  • Yu L, Ding W, Li RP (2004). Effect of the multiple modules interaction on MOB connector loads. The Ocean Engineering, 22(1), 25–31. (in Chinese) DOI: 10.3969/j.issn.1005-9865.2004.01.004

    MathSciNet  Google Scholar 

  • Yu L, Li RP, Shu Z (2003). Dynamic characteristics of mobile offshore base connectors. Journal of Shanghai Jiao Tong University, 37(8), 1159–1163. (in Chinese) DOI: 10.3321/j.issn:1006-2467.2003.08.005

    Google Scholar 

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Authors and Affiliations

  1. School of Naval Architecture and Marine Engineering, Jiangsu University of Science and Technology, Zhenjiang, 212003, China

    Jiayang Gu, Jie Wu, Yifeng Guan & Yubo Yuan

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

    Enrong Qi

Authors
  1. Jiayang Gu
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  2. Jie Wu
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  3. Enrong Qi
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  4. Yifeng Guan
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  5. Yubo Yuan
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Correspondence to Jiayang Gu.

Additional information

Foundation item: Supported by the National Natural Science Foundation of China (51309123), National Key Basic Research and Development Plan (973 Plan, 2013CB036104), Jiangsu Province Natural Science Research Projects in Colleges and Universities (13KJB570002), Open Foundation of State Key Laboratory of Ocean Engineering (1407), “Qing Lan Project” of Colleges and Universities in Jiangsu Province, Academic Program Development of Jiangsu Higher Education Institutions (PAPD).

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Gu, J., Wu, J., Qi, E. et al. Time domain calculation of connector loads of a very large floating structure. J. Marine. Sci. Appl. 14, 183–188 (2015). https://doi.org/10.1007/s11804-015-1307-9

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  • DOI: https://doi.org/10.1007/s11804-015-1307-9

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