Structural Engineering and Mechanics

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Hydrodynamic analysis of floating structures with baffled ARTs

  • Kim, San (Department of Mechanical Engineering, Korean Advanced Institute for Science and Technology) ;
  • Lee, Kang-Heon (Korea Atomic Energy Research Institute)
  • Received : 2018.07.16
  • Accepted : 2018.09.06
  • Published : 2018.10.10
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Abstract

In ocean industry, free surface type ART (Anti Roll tank) system has been widely used to suppress the roll motion of floating structures. In those, various obstacles have been devised to obtain the sufficient damping and to enhance the controllability of freely rushing water inside the tank. Most of previous researches have paid on the development of simple mathematical formula for coupled ship-ARTs analysis although other numerical and experimental approaches exist. Little attention has been focused on the use of 3D panel method for preliminary design of free surface type ART despite its advantages in computational time and general capacity for hydrodynamic damping estimation. This study aims at developing a potential theory based hydrodynamic code for the analysis of floating structure with baffled ARTs. The sloshing in baffled tanks is modeled through the linear potential theory with FE discretization and it coupled with hydrodynamic equations of floating structures discretized by BEM and FEM, resulting in direct coupled FE-BE formulation. The general capacity of proposed formulation is emphasized through the coupled hydrodynamic analysis of floating structure and sloshing inside baffled ARTs. In addition, the numerical methods for natural sloshing frequency tuning and estimation of hydrodynamic damping ratio of liquid sloshing in baffled tanks undergoing wave exiting loads are developed through the proposed formulation. In numerical examples, effects of natural frequency tuning and baffle ratios on the maximum and significant roll motions are investigated.

Keywords

Acknowledgement

Supported by : Disaster and Safety Management Institute, Korea Institute of Energy Technology Evaluation and Planning (KETEP)

References

  1. Bhosale, A.D. and Murudi, M.M. (2017), "Seismic control of structures using sloped bottom tuned liquid dampers", Struct. Eng. Mech., 64(2), 233-241. https://doi.org/10.12989/sem.2017.64.2.233
  2. Bureau Veritas (2007), Hydrostar for Experts User Manual, Research Department Bureau Veritas Press, Paris, France.
  3. Cho, J.R., Han, K.C., Hwang, S.W., Cho, C.S. and Lim, O.K. (2012), "Mobile harbor: structural dynamic response of RORI crane to wave-induced rolling excitation", Struct. Eng. Mech., 43(5), 679-690. https://doi.org/10.12989/sem.2012.43.5.679
  4. Faltinsen, O.M. and Timokha, A.N. (2009), Sloshing, Cambridge University Press.
  5. Firouz‐Abadi, R.D., Haddadpour, H., Noorian, M.A. and Ghasemi, M. (2008), "A 3D BEM model for liquid sloshing in baffled tanks", Int. J. Numer. Meth. Eng., 76(9), 1419-1433. https://doi.org/10.1002/nme.2363
  6. Francescutto, A. and Contento, G. (1999), "An investigation on the applicability of simplified mathematical models to the rollsloshing problem", Int. J. Offsh. Pol. Eng., 9(2), 97-104.
  7. Froude, W. (1861), "On the rolling of ships", Trans. Inst. Nav. Archit., 2, 180-227.
  8. Goodrich, G.J. (1969), "Development and design of passive roll stabilisers", Trans. Inst. Nav. Archit., 111, 81-95.
  9. Goudarzi, M.A. and Sabbagh-Yazdi, S.R. (2012), "Analytical and experimental evaluation on the effectiveness of upper mounted baffles with respect to commonly used baffles", Ocean Eng., 42, 205-217.
  10. Iglesias, A.S., Rojas, L.P. and Rodríguez, R.Z. (2004), "Simulation of anti-roll tanks and sloshing type problems with smoothed particle hydrodynamics", Ocean Eng., 31(8-9), 1169-1192. https://doi.org/10.1016/j.oceaneng.2003.09.002
  11. Isaacson, M. and Premasiri, S. (2001), "Hydrodynamic damping due to baffles in a rectangular tank", Can. J. Civil Eng., 28(4), 608-616. https://doi.org/10.1139/l01-022
  12. Jeon, S.H., Seo, M.W., Cho, Y.U., Park, W.G. and Jeong, W.B. (2013), "Sloshing characteristics of an annular cylindrical tuned liquid damper for spar-type floating offshore wind turbine", Struct. Eng. Mech., 47(3), 331-343. https://doi.org/10.12989/sem.2013.47.3.331
  13. Journee, J.M. and Massie, W.W. (2001), Offshore Hydrodynamics, Delft University of Technology, Delft, the Netherlands.
  14. Khabakhpasheva, T.I. and Korobkin, A.A. (2002), "Hydroelastic behaviour of compound floating plate in waves", J. Eng. Math., 44(1), 21-40. https://doi.org/10.1023/A:1020592414338
  15. Kim, K.T., Lee, P.S. and Park, K.C. (2013), "A direct coupling method for 3D hydroelastic analysis of floating structures", Int. J. Numer. Meth. Eng., 96(13), 842-866. https://doi.org/10.1002/nme.4564
  16. Kim, Y. (2002), "A numerical study on sloshing flows coupled with ship motion-the anti-rolling tank problem", J. Ship Res., 46(1), 52-62.
  17. Lee, B.S. and Vassaols, D. (1996), "An investigation into the stabilisation effects of anti-roll tanks with flow obstructions", Int. Shipbuil. Prog., 43(433), 70-88.
  18. Lee, C.H. and Newman, J.N. (2006), WAMIT User Manual, Department of Ocean Engineering, MIT, Cambridge, MA, U.S.A.
  19. Lee, K.H. and Lee, P.S. (2016), "Nonlinear hydrostatic analysis of flexible floating structures", Appl. Ocean Res., 59, 165-182. https://doi.org/10.1016/j.apor.2016.05.016
  20. Lee, K.H., Cho, S., Kim, K.T., Kim, J.G. and Lee, P.S. (2015), "Hydroelastic analysis of floating structures with liquid tanks and comparison with experimental tests", Appl. Ocean Res., 52, 167-187. https://doi.org/10.1016/j.apor.2015.06.002
  21. Lewison, G.R.G. (1976), "Optimum design of passive roll stabilizer tanks", Trans. Inst. Nav. Archit., 31-45.
  22. Maleki, A. and Ziyaeifar, M. (2008), "Sloshing damping in cylindrical liquid storage tanks with baffles", J. Sound Vibr., 311(1-2), 372-385. https://doi.org/10.1016/j.jsv.2007.09.031
  23. Miles, J.W. (1958), "Ring damping of free surface oscillations in a circular tank", J. Appl. Mech., 25(2), 274-276.
  24. Moaleji, R. and Greig, A.R. (2007), "On the development of ship anti-roll tanks", Ocean Eng., 34(1), 103-121. https://doi.org/10.1016/j.oceaneng.2005.12.013
  25. Price, W.G. and Bishop, R.E.D. (1974), Probabilistic Theory of Ship Dynamics, Chapman and Hall, London, U.K.
  26. Rahman, M.S., Islam, M.S., Do, J. and Kim, D. (2017), "Response surface methodology based multi-objective optimization of tuned mass damper for jacket supported offshore wind turbine", Struct. Eng. Mech., 63(3), 303-315. https://doi.org/10.12989/SEM.2017.63.3.303
  27. Sellars, F.H. and Martin, J.P. (1992), "Selection and evaluation of ship roll stabilization systems", Mar. Technol., SNAME, 29(2), 84-101.
  28. Souto, A. and Gonzalez, V. (2001), "Passive stabilizer tanks simulation using SPH models", Proceedings of the Fluid Structure Interaction, Halkidiki, Greece.
  29. Taylor, R.E. (2007), "Hydroelastic analysis of plates and some approximations", J. Eng. Math., 58(1-4), 267-278. https://doi.org/10.1007/s10665-006-9121-7
  30. Van Den Bosch, J.J. and Vugts, J.H. (1966), "On roll damping by free-surface tanks", Trans. Inst. Nav. Archit.
  31. Wang, C.D. and Meylan, M.H. (2004), "A higher-order-coupled boundary element and finite element method for the wave forcing of a floating elastic plate", J. Flu. Struct., 19(4), 557-572. https://doi.org/10.1016/j.jfluidstructs.2004.02.006
  32. Watts, P. (1883), "On a method of reducing the rolling of ships at sea", Trans. Inst. Nav. Archit., 24, 165-190.
  33. Watts, P. (1885), "The use of water chambers for reducing the rolling of ships at sea", Trans. Inst. Nav. Archit., 26.
  34. Yoon, J.S. and Lee, P.S. (2017), "Towards hydro-elastoplastic analysis of floating plate structures", J. Flu. Struct., 71, 164-182. https://doi.org/10.1016/j.jfluidstructs.2017.03.008

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