|Table of Contents|

Citation:
　Sharad Dhavalikar,Prasada N. Dabbi,Deepti Poojari,et al.Development of Empirical Formulation for Bow Flare Slamming and Deck Wetness for Displacement Vessels[J].Journal of Marine Science and Application,2018,(3):414-431.[doi:10.1007/s11804-018-0045-1]
Click and Copy

Development of Empirical Formulation for Bow Flare Slamming and Deck Wetness for Displacement Vessels

Info

Title:
Development of Empirical Formulation for Bow Flare Slamming and Deck Wetness for Displacement Vessels
Author(s):
Sharad Dhavalikar;  Prasada N. Dabbi;  Deepti Poojari;  Ramkumar Joga;  Sachin Awasare
Affilations:
Author(s):
Sharad Dhavalikar;  Prasada N. Dabbi;  Deepti Poojari;  Ramkumar Joga;  Sachin Awasare
Research and Innovation Centre, Indian Register of Shipping, Mumbai 400 072, India
Keywords:
Bow flare slamming; Deck wetness; Swell-up; Relative freeboard; Relative motion; Flare angle
分类号:
-
DOI:
10.1007/s11804-018-0045-1
Abstract:
The paper presents an empirical method to calculate bow flare slamming pressure and the green water load. Many empirical formulae for various types of vessels have been provided by rules of ship classification societies. In the present work, attempt is made to develop generalized formulations for all types of displacement vessels. Extreme sea conditions are considered. Bow flare pressure is derived in terms of flare and waterline angles. Specific condition for limiting waterline angle is derived based on 2D numerical simulations. Deck wetness is derived in terms of static and dynamic swell-up and the relative motion. Variation of static swell along the length is determined based on potential solution based analyses considering variation in vessels’ hull. 2D wedge simulations are carried out to validate the formulation of dynamic swell-up. Results of the calculated bow flare and deck pressures are compared with various ship classification society formulations and the trends are found to be in good agreement in general barring at bow flare where lower pressure is found in most of the presented cases. Also IACS UR S21A (2018) governing minimum pressure for deck scantlings is found to be conservative in few of the presented cases. Although scantlings assessment is not performed, the presented new formulations may help in realistic assessment of scantlings.

References:

ABS (2018a) Rules for building and classing steel vessels (part 5A & 5B Specific vessel types). American Bureau of Shipping, Houston
ABS (2018b) Rules for building and classing steel vessels (part 5C Specific vessel types). American Bureau of Shipping, Houston
ABS (2018c) Rules for building and classing high-speed naval craft. American Bureau of Shipping, Houston
Aly AM, Asai M, Sonoda Y (2011) Simulation of free falling rigid body into water by a stabilized incompressible SPH method. Ocean Systems Engineering 1(3):207-222. https://doi.org/10.12989/ose.2011.1.3.207
Baji? D, Prpi?-Or?i? J, Turk A (2010) Bow flare impact loads on containerships. Proceedings of the XIX Symposium Theory and Practice of Shipbuilding, in Memoriam Prof. Leopold Sorta, Lumbarda, Italy, 344-351
Bhattacharyya R (1978) Dynamics of marine vehicles. A Wiley Interscience Publication, Maryland, pp 153-155
BV (2017a) Rules for the classification of steel ships. Bureau Veritas, Neuilly-sur-Seine
Cedex BV (2017b) Rules for the classification of naval ships, part D. Bureau Veritas, Neuilly-sur-Seine
Cedex Carvalho e Silva DF, Rossi R (2014) Green water loads determination for FPSOs exposed to beam sea conditions, Proceedings of the 23rd OMAE. San Francisco, USA
Carvalho e Silva DF, Coutinho Alvaro LGA, Esperança Paulo TT (2017) Green water loads on FPSOs exposed to beam and quartering seas, part Ⅱ:CFD simulations. Ocean Eng 140:434-452. https://doi.org/10.1016/j.oceaneng.2016.11.008
CSR (2015) Common structural rules for bulk carriers and oil tankers. IACS
Dhavalikar S, Dabbi PN, Awasare S, Poojari D, Joga R, Kar AR (2018)Development of empirical formulations of slamming loads for displacement vessels. Ocean Eng 159:563-580. https://doi.org/10.1016/j.oceaneng.2018.02.042
DNV-GL (2015) Rules for classification:Naval vessels, Hovik
DNV-GL (2017) Rules for Classification:Ships, Hovik
Drummen I, Holtmann M (2014) Benchmark study of slamming and whipping. Ocean Eng 86:3-10. https://doi.org/10.1016/j.oceaneng.2013.12.012
Gingold RA, Monaghan JJ (1977) Smoothed particle hydrodynamics:theory and application to non-spherical stars. Royal Astronautical Society 181:375-389
Greenhow M, Lin W (1985) Numerical simulation of nonlinear free surface flows generated by wedge entry and wave maker motions. 4th international conference on numerical ship hydrodynamics, Washington, DC
Guo BD, Qu QL, Wu JL, Liu PQ (2013) Fluid-structure interaction modeling by ALE and SPH. Appl Mech Mater 275:393-397
Hermundstad OA, Moan T (2005) Numerical and experimental analysis of bow flare slamming on a Ro-Ro vessel in regular oblique waves.J Mar Sci Technol 10:105-122. https://doi.org/10.1007/s00773-005-0192-3
Hirata N (2015) A workshop on CFD in ship hydrodynamics:JBC test data in NMRI, Tokyo
IACS UR S21A (2018) Requirements concerning strength of ships. Req. 2011/rev.1 2015/Corr.1 2018,
ICLL (1966) International convention on load lines, Part-1
IRS (2017) Rules and regulations for the construction and classification of steel ships. Indian Register of Shipping, Mumbai
ISSC (2012) Impulsive pressure loading and response assessment. Proceedings of the 18th international ship and offshore structures congress, 2, Rostock, Germany 275-330
ISSC (2015) Loads. Proceedings of the 19th international ship and offshore structures congress, 1. Cascais, Portugal 73-140
Joga R, Saripilli J, Dhavalikar S, Kar AR (2014) Numerical simulations to compute rate of water ingress into open holds due to green waters, Proceedings of ISOPE2014, Busan, Korea, 739-745
Kapsenberg GK (2011) Slamming of ships:where are we now? Philosophical Transactions of the Royal Society of London A:Mathematical, Physical and Engineering Sciences 369:2892-2919
Kapsenberg GK, Thornhill ET (2010) A practical approach to ship slamming in waves. 28th Symposium on naval hydrodynamics, Pasadena, California USA
Kim S, Kim CY, Cronin D (2013) Green water impact loads on breakwaters of large container carriers. Proceedings of the PRADS2013, Changwon City Korea, 619-624
KRS (2017) Rules for the classification of steel ships.Korean Register of Shipping, Busan LRS (2017a) Rules and regulations for the classification of ships. Lloyd’s Register of Shipping, London
LRS (2017b) Rules and regulations for the classification of naval ships. Lloyd’s Register of Shipping, London
Luo H, Wang S, Guedes Soares C (2011) Numerical prediction of slamming loads on a rigid wedge subjected to water entry using an explicit finite element method. In:Guedes Soares C, Fricke W (eds) Advances in Marine Structures. Taylor &Francis, Didcot, pp 41-47. https://doi.org/10.1201/b10771-7
Luo H, Wang H, Guedes Soares C (2012) Numerical and experimental study of hydrodynamic impact and elastic response of one free-drop wedge with stiffened panels. Ocean Eng 40:1-14. https://doi.org/10.1016/j.oceaneng.2011.11.004
Ochi MK (1964) Extreme behavior of a ship in rough seas-slamming and shipping of green water, The SNAME annual meeting, New York, USA
Oger G, Doring M, Alessandrini B, Ferrant P (2006) Two-dimensional SPH simulations of wedge water entries. J Comput Phys 213(2):803-822. https://doi.org/10.1016/j.jcp.2005.09.004
Pakozdi C, Östman A, Stansberg C, Carvalho e Silva DF, (2014) Green water on FPSO analyzed by a coupled potential-flow-NS-VOF method, Proceedings of the 23rd OMAE. San Francisco, USA
Rahaman MM (2012) Analysis of the mechanism of slamming on the bow flare region of ship’s hull by using RaNS CFD method, PhD.Thesis, The University of Tokyo
Rajendran S, Vasquez G, Guedes Soares C (2016) Effect of bow flare on the vertical ship responses in abnormal waves and extreme seas.Ocean Eng 124:419-436. https://doi.org/10.1016/j.oceaneng.2016.07.020
Ruggeri F, Watai RA, Brisson H, Mello PA, Sampaio CMP, Carvalho e Silva DF, Vieira DP, (2013) Numerical prediction of green water events in beam seas, Proceedings of the PRADS 2013, Changwon City Korea, 892-897
Sames PC, Schellin TE (2001) Assessment of sloshing loads for tankers, Practical Design of Ships and Other Floating Structures, 1, 637-643
Sasson M, Chai S, Beck G, Jin Y, Rafieshahraki J (2016) A comparison between smoothed-particle hydrodynamics and RANS volume of fluid method in modelling slamming. J Ocean Eng Sci 1(2):119-128. https://doi.org/10.1016/j.joes.2016.03.004
Shao S (2009) Incompressible SPH simulation of water entry of a freefalling object. Int J Numer Methods Fluids 59(1):91-115. https://doi.org/10.1002/fld.1813
Stenius I, Rosn A, Kuttenkeuler J (2006) Explicit FE-modeling of fluidstructure interaction in hull-water impacts. Int Shipbuild Prog 53:1031-1121
Stenius I, Rosn A, Kuttenkeuler J (2007) Explicit FE-modelling of hydroelasticity in panel-water impacts. Int Shipbuild Prog 54(2/3):111-127
Sun H, Faltinsen OM (2006) Water impact of horizontal circular cylinders and cylindrical shells. Appl Ocean Res 28(5):299-311. https://doi.org/10.1016/j.apor.2007.02.002
Temarel P, Bai W, Bruns A, Derbanne Q, Dessi D, Dhavalikar S, Fonseca N, Fukasawa T, Gui X, Nestegård A, Papanikolaou A, Parunov J, Song K, Wang S (2016) Prediction of wave-induced loads on ships:progress and challenges. Ocean Eng 119:274-308. https://doi.org/10.1016/j.oceaneng.2016.03.030
Veen DJ, Gourlay TP (2012) A combined strip theory and smoothed particle hydrodynamics approach for estimating slamming loads on a ship in head seas. Ocean Eng 43:64-71. https://doi.org/10.1016/j.oceaneng.2012.01.026
Voogt A J, Buchner B (2004) Prediction of wave impact loads on ship type offshore structures in steep fronted waves. Proceedings of the ISOPE2004, paper no 2004 JSC-343. Toulon, France
Wang S, Guedes Soares C (2012) Analysis of the Water impact of symmetric wedges with a multi-material Eulerian formulation. Int J Marit Eng 154(A4). https://doi.org/10.3940/rina.ijme.2012.a4.249
Wang S, Guedes Soares C (2013) Slam induced loads on bow-flared sections with various roll angles. Ocean Eng 67:45-57. https://doi.org/10.1016/j.oceaneng.2013.04.009
Wang S, Guedes Soares C (2014a) Asymmetrical water impact of twodimensional wedges with roll angle. Int J Marit Eng 156(A2):115-130. https://doi.org/10.3940/rina.ijme.2014.a2.280
Wang S, Guedes Soares C (2014b) Numerical study on the water impact of 3D bodies by explicit finite element method. Ocean Eng 78:73-88. https://doi.org/10.1016/j.oceaneng.2013.12.008
Wang S, Guedes Soares C (2014c) Numerical study on hydroelastic water entry of a wedge. In:Guedes Soares C, López Peña F (eds)Developments in maritime transportation and exploitation of sea resources. Francis & Taylor Group, London, pp 199-208
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
Wang S, Guedes Soares C (2017) Review of ship slamming loads and responses. J Mar Sci Appl 16(4):427-445. https://doi.org/10.1007/s11804-017-1437-3
Wang S, Luo HB, Guedes Soares C (2014) Numerical prediction of slamming loads on a bow-flared section during water entry. Int J Marit Eng 156:A303-A314. https://doi.org/10.3940/rina.ijme.2014.a4.304
Wu G (2012) Numerical simulation for water entry of a wedge at varying speed by a high order boundary element method. J Mar Sci Appl 11(2):143-149. https://doi.org/10.1007/s11804-012-1116-3
Xiao J, Batra R (2016) Local water slamming of curved rigid hulls.Multiphysics 6(3):305-339
Xu GD, Duan WY, Wu GX (2008) Numerical simulation of oblique water entry of an asymmetrical wedge. Ocean Eng 35:1597-1603.https://doi.org/10.1016/j.oceaneng.2008.08.002
Yettou EM, Desrochers A, Champoux Y (2006) Experimental study on the water impact of a symmetrical wedge. Fluid Dyn Res 38:47-66.https://doi.org/10.1016/j.fluiddyn.2005.09.003
Zhao R, Faltinsen OM (1993) Water entry of two-dimensional bodies. J Fluid Mech 246:593-612. https://doi.org/10.1017/S002211209300028X
Zhao R, Faltinsen OM, Aarsnes JV (1996) Water entry of arbitrary twodimensional sections with and without flow separation. Proceedings of the 21st Symposium on Naval Hydrodynamics, Trondheim, 408-423

Memo

Memo:
Received date:2018-5-1;Accepted date:2018-7-27。
Corresponding author:Sharad Dhavalikar,ss.dhavalikar@irclass.org
Last Update: 2019-03-05