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http://dx.doi.org/10.1016/j.ijnaoe.2020.03.006

Experimental study on the effects of stern bulb arrangement on the slamming load  

Park, Jongyeol (Department of Naval Architecture and Ocean Engineering, Seoul National University)
Choi, Ju Hyuck (Hyundai Maritime Research Institute, Hyundai Heavy Industries Co., Ltd.)
Lee, Hyun-ho (Fundamental Technology Research Institute, Korea Shipbuilding & Offshore Engineering Co., Ltd.)
Rhee, Shin Hyung (Department of Naval Architecture and Ocean Engineering, Seoul National University)
Publication Information
International Journal of Naval Architecture and Ocean Engineering / v.12, no.1, 2020 , pp. 518-530 More about this Journal
Abstract
The present study concerns the stern slamming load of container carriers, with stern bulb arrangement variation. First, a series of wedge drop tests were conducted using simple wedge models with fixed deadrise angles, and tests with the cross-section models of practical container carrier sterns were followed. The deadrise angle of the simple wedge ranged from 0° to 10°. The pressure measurement results of the simple wedge drop tests were distributed between empirical formula and analytic solution, so the experimental setup was validated. In the cases of practical hull cross-sections, the water entry of the bulb prior to that of the transom resulted in characteristic water film generation and delayed pressure peak appearance. The trapped air between the bulbs damped the pressure in the twin skeg hull case, reducing the pressure peak and causing the pressure oscillation during water entry.
Keywords
Wedge drop; Stern slamming; Model test; Water entry impact;
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1 Kapsenberg, G.K., 2011. Slamming of ships: where are we now? Phil. Trans. Roy. Soc. Lond. Math. Phys. Eng. Sci. 369 (1947), 2892-2919.
2 Kawakami, M., Michimoto, J., Kobayashi, K., 1977. Prediction of long term whipping vibration stress due to slamming of large full ships in rough seas. Int. Shipbuild. Prog. 24, 83-110.   DOI
3 Kleefsman, K.M.T., Fekken, G., Veldman, A.E.P., Iwanowski, B., Buchner, B., 2005. A volume-of-fluid based simulation method for wave impact problems. J. Comput. Phys. 206 (1), 363-393.   DOI
4 Luo, H., Wang, H., Guedes Soares, G., 2012. Numerical and experimental study of hydrodynamic impact and elastic response of one free-drop wedge with stiffened panels. Ocean Eng. 40, 1-14.   DOI
5 Maki, K.J., Lee, D., Troesch, A.W., Vlahopoulos, N., 2011. Hydroelastic impact of a wedge-shaped body. Ocean Eng. 38 (4), 621-629.   DOI
6 Michimoto, J., Imayoshi, N., 1982. On the stern flare impact pressure of RORO ship (in Japanese). J. Soc. Nav. Archit. Jpn. 151, 208-214.   DOI
7 Oberhagemann, J., et al., 2010. Hydro-elastic simulation of stern slamming and whipping. Int. J. Ocean Clim. Syst. 1 (3-4), 179-188.   DOI
8 Ochi, M.K., Motter, L.E., 1973. Prediction of slamming characteristics and hull responses for ship design. Trans. - Soc. Nav. Archit. Mar. Eng. 81, 144-176.
9 Stavovy, A.B., Chuang, S.L., 1976. Analytical determination of slamming pressures for high-speed vehicles in waves. J. Ship Res. 20 (4), 190-198.   DOI
10 Panciroli, R., Shams, A., Porfiri, M., 2015. Experiments on the water entry of curved wedges: high speed imaging and particle image velocimetry. Ocean Eng. 94, 213-222.   DOI
11 Storhaug, Gaute, 2014. The measured contribution of whipping and springing on the fatigue and extreme loading of container vessels. Int. J. Naval Arch. Ocean Eng. 6 (4), 1096-1110.   DOI
12 Sun, H., Faltinsen, O.M., 2009. Water entry of a bow-flare ship section with roll angle. J. Mar. Sci. Technol. 14 (1), 69-79.   DOI
13 Tveitnes, T., Fairlie-Clarke, A.C., Varyani, K., 2008. An experimental investigation into the constant velocity water entry of wedge-shaped sections. Ocean Eng. 35 (14-15), 1463-1478.   DOI
14 Von Karman, Th., 1929. The impact on seaplane floats during landing.
15 Wagner, H., 1932. Uber StoB- und Gleitvergange an der Oberflache von FlUssig-keiten. Z. Angew. Math. Mech. 12 (4), 193-215.   DOI
16 Yang, S.H., Lee, H.H., Park, T.H., Lee, L.H., Lee, Y.W., 2007. Experimental and numerical study on the water entry of symmetric wedges and a stern section of modern containership. In: 10th International Symposium on Practical Design of Ships and Other Floating Structures. Houston, Tx., PRADS2007-20107.
17 Dessi, D., de Luca, M., Mariani, R., Carapellotti, D., 2007. Analysis of the ship response to stern slamming loads. In: 10th International Symposium on Practical Design of Ships and Other Floating Structures. Houston, TX., PRADS2007-20152.
18 Yettou, E.M., Desrochers, A., Champoux, Y., 2006. Experimental study on the water impact of a symmetrical wedge. Fluid Dynam. Res. 38 (1), 47-66.   DOI
19 Chuang, S.L., 1967. Experimental on slamming of wedge-shaped bodies. J. Ship Res. 11 (3), 190-198.   DOI
20 Cusano, G., Sebastiani, L., Bacicchi, G., 2007. Assessment of whipping effects induced by stern/bow-flare slamming. In: 10th International Symposium on Practical Design of Ships and Other Floating Structures. Houston, TX., PRADS2007-20189.
21 Engle, A., Lewis, R., 2003. A comparison of hydrodynamic impacts prediction methods with two dimensional drop test data. Mar. Struct. 16 (2), 175-182.   DOI
22 Faltinsen, O.M., Chezhian, M., 2005. A generalized wagner method for threedimensional slamming. J. Ship Res. 49 (4), 279-287.   DOI
23 Howison, S.D., Ockendon, J.R., Wilson, S.K., 1991. Incompressible water-entry problems at small deadrise angles. J. Fluid Mech. 222, 215-230.   DOI