P2007-2
Proceedings
22"^
International Workshop
on Water Waves
Delft University of Technology
Ship Hydromechanics Laboratory
Library
Mekelweg 2, 2628 CD Delft The Netherlands
Phone: +31 15 2786873 - Fax: +3115 2781836
and Floating Bodies
nder the auspices of the Croatia Academy of Sciences and Arts
Scientific Council for Maritime Affairs
1 5 - 1 8 April 2007, Plitvlce, CROATIA
B U R E A U V E R I T A S
Editors:
22"^^ International Workshop
on Water Waves
and Floating Bodies
Proceedings
ISBN: 978-953-95746-0-2
Published by: VIDICI d.o.o., Velika Rakovica, Samobor, Croatia
Foreword
The International Workshop on Water Waves and Floating Bodies is an annual meeting of engineers and scientists with special interests in water waves and the effects of waves on floating or submerged bodies. The workshop was initiated over twenty years ago by Professor Nick Newman from MIT and Professor David Evans from Bristol University. Since its inception, the workshop has grown from strength to strength and annually brings together marine hydrodynamicists, naval architects, offshore and arctic engineers and other scientists and mathematicians, from both industry and academia, to discuss current research and practical problems in a focused week of activity. Attendance is restricted to the authors of submitted extended abstracts that are reviewed for acceptance by a small committee. These proceedings include the extended abstract for every presentation made at the 22"'' workshop. The proceedings of previous workshops are available online at ww\v.i'ina.ora:.uk thanks to the cooperation of the Royal Institution of Naval Architects. The list of the previous Workshops is shovm in the table below.
1st 16/02/1986 19/02/1986 M.I.T (MA) USA 2nd 16/03/1987 19/03/1987 Bristol U.K. 3rd 10/04/1988 13/04/1988 M.I.T (MA) USA 4th 07/05/1989 10/05/1989 Oystese Norway 5th 25/03/1990 28/03/1990 Manchester U.K. 6th 14/04/1991 17/04/1991 Woods Hole (MA) USA 7th 24/05/1992 27/05/1992 Val de Reuil France 8th 23/05/1993 26/05/1993 ; St John's Newfoundland Canada 9th 17/04/1994 20/04/199 Kuju J a p a n
10th 02/04/1995 05/04/1995 Oxford U.K. 11th 17/03/1996 20/03/1996 Hamburg G e r m a n y
12th 16/03/1997 19/03/1997 : Carry le Rouet ] France 13th 29/03/1998 01/04/1998 Alphen aan den Rijn Netherland 14th 11/04/1999 14/04/1999 Port Huron (MI) USA
15th 27/02/2000 01/03/2000 Caesarea I s r a e l 16th 22/04/2001 25/04/2001 Hiroshima J a p a n 17th 14/04/2002 17/04/2002 Cambridge U.K. 18th 06/04/2003 09/04/2003 Le Croisic F r a n c e 19th 28/03/2004 31/03/2004 Cortona I t a l y 20th 29/05/2005 01/06/2005 Longyearbyen Norway 2 1 s t 01/05/2006 05/05/2006 Loughborough UK
The 22" International Workshop on Water Waves and Floating Bodies was jointly organized by Bureau Veritas - Research Department and Faculty of Mechanical Engineering and Naval Architecture of Zagreb University. The workshop took place in Hotel Jezero at Plitvice Lakes in Croatia.
Makoto Ohkusu
The 22" IWWWFB is dedicated to Professor Makoto Ohkusu who left us suddenly last year. Professor Ohkusu was a regular contributor to the Workshop, indeed he hosted the 9"^ IWWWFB in Kyushu. He travelled extensively, often with his family, lecturing and collaborating with colleagues around the world.
After studying with Takao Inui at the University of Tokyo, Makoto began his prolific career at Kyushu University, working initially in association with the late Professor Fukuzo Tasai. Ohkusu performed seminal research on the hydrodynamic interactions among multiple floating bodies, which greatly contributed to the development of multi-hull ships and offshore platforms. Later he developed the unsteady wave-pattern analysis method, which provided a new technique for studying ships running with forward speed in waves. He also published many other noteworthy papers, concerning such topics as the nonlinear behaviour o f a long flexible cable; a new evaluation method for the oscillating and translating Green fiinction; and its application to the boundary-value problem for the flow around ships. He performed extensive studies of the hydroelastic problems associated with very large floating structures such as floating airports.
In 1981 Ohkusu was promoted as a Full Professor at Kyushu University. He served from 1997 to 1999 as the Director of the University's Research Institute of Applied Mechanics. Many students benefited from his tutelage and support. When he retired in 2001, an International Conference on 'Hydrodynamics in Ship and Ocean Engineering' was held in his honor. From 2004 to 2006 he served as the Director of the Marine Technology Center at the Japan Agency for Marine-Earth Science and Technology.
We all remember Makoto Ohkusu, both for his kindness and the high quality o f his work. His research and generous spirit have inspired us, and his absence is mourned by our community.
22"** International Workshop on Water Waves and Floating Bodies
CONTENTS
Bennetts L . G . , Biggs N.R.T. and Porter D.
Wave scattering by a circular ice floe of variable thickness
Bhattacharjee J . , Karmakar D., and Sahoo T. 5
On transformation of flexural gravity waves
Bingham H.B., Engsig-Karup A . P. and Lindberg O. 9
A high-order finite difference method for nonlinear wave-stmcture interaction
Blenkinsopp C E . and ChapHn J.R. 13
Validity of small-scale physical models involving breaking waves
Bredmose H., Peregrine D.H. and Hunt A. 17
Wave height ? A study of the impact of wave groups on a coastal structure
Breslin J.P. 21
Prediction of planing forces on prismatic hulls far exceeding expectations by inconsistent theory
Casetta L . and Pesce C P . 25
Hamilton's principle for dissipative systems and Wagner's problem
Chaplin J.R., Farley F.J.M. and Rainey R . C T . 29
Power conversion in the Anaconda WEC
Chatjigeorgiou I.K. and Mavrakos S.A. 33
A semi-analytical formulation for the wave-current interaction problem with a vertical bottom-seated cylinder including square velocity terms
Chen X.B. and Duan W.Y. 37
Formulations of low-frequency QTF by 0(Aa)) approximation
Chung J.Y., Nahm J . C , Kang H.D. and Kwon S.H. 41
A novel experimental technique in Slamming
Colicchio G., Greco M. and Faltinsen C M . 45
Influence of gaseous cavities in ship-hydrodynamic problems : a simplified study
Delhommeau G., Noblesse F. and Guilbaud M. 49
Simple analytical approximation to a ship bow wave
22"' IVMWF-B, Plitvice. Croatia 2007
De S., and Mandal B.N. 53
Water wave scattering by two partially immersed barriers - an altemative method of solution
Diebold L . 57
Study of the Neumann-Kelvin problem for one hemisphere
Doctors L . J . 61
A test of linearity in the generation of ship waves
Duan W.Y. and Dai Y.S. 65
Integration of the Time-Domain green fiinction
Ducrozet G., Bonnefoy F . , Le Touzé D. and Ferrant P. 69
Investigation of freak waves in large scale 3D Higher-Order spectral simulations
Eatock Taylor R. and Meylan M.H. 73
Theory of scattering frequencies applied to near-frapping by cylinders
Elkin J.D. and Yeung R.W. 77
Sway and roll hydrodynamics of twin rectangular cylinders
Evans D.V. and Porter R . 81
Examples of motion trapped modes in two and three dimensions
Fitzgerald C . J . and Mclver P. 85
Approximaring near-resonant wave motion using a mechanical oscillator model
Forestier J.M. 89
Evolution equation of a potential flow with a free surface and moving solid boundaries
Gazzola T. 93
A shape optimisation technique for the Wagner problem
Gilloteaux J . C , Ducrozet G., Babarit A. and Clément A.H. 97
Non-linear model to simulate large amplitude motions : application to wave energy conversion
Greaves D. 101
Numerical simulation of breaking waves and wave loading on a submerged cylinder
Grue J . 105
Nonlinear wave-body interaction by a formulation in spectral space
Harter R., Abrahams I.D. and Simon M.J. 109
The effect of surface tension on trapped modes in water wave problems
22"^ IWymFB, Plitvice. Croatia 2007
lafrati A. and Korobkin A.A. 113
Numerical analysis of initial stage of plate impact on water surface
KashiwagiM. 117
Reciprocity relations of waves generated by an antisymmetric floating body
Khabakhpasheva T.L and Wu G.X. 121
Coupled compressible and incompressible approach for jet impact onto elastic plate
Klopman G., Dingemans M. W. and van Groesen B. 125
Propagation of wave groups over bathymetry using a variational Boussinesq model
Korobkin A. and Malenica S 129
Steep wave impact onto elastic wall
Malenica S., Senjanovic I., Tomasevic S. and Stumpf E . 133
Some aspects of hydroelastic issues in the design of ultra large container ships
Malleron N., Scolan Y.-M. and Korobkin A.A. 137
Some aspects of a generalized Wagner model
Miloh T. 141
Strucmral acoustics of a floating circular elastic plate
Molin B., Kimmoun O. and Remy F. 145
Non-linear standing wave effects on the weather side of a wall with a narrow gap
Nabergoj R. and Prpié-OrSic J . 149
A comparison of different methods for added resist£mce prediction
Nam B-W. and Kim Y . 153
Effects of sloshing on the motion response of LNG-FPSO in waves
Newman J.N. 157
Trapping structures with linear mooring forces
Noblesse F., Yang C. and Espinosa R. 161
Nearfield and farfield boundary-integral representations of free-surface flows
Pinkster J.A. and Hermans A.J. 165
A rotating wing for the generation of energy from waves
Pistani F. and Thiagarajan K . 169
Experimental campaign on a moored FPSO in complex bi-directional sea states
Qiu W. and Peng H. 173
Numerical solution of body-exact problem in the Time Domain with a panel-free method
2Z-^ IWWWFB, Plitvice, Croatia 2007
Scolan Y.M., Kimmoun O., Branger H. and Remy F . 177
Nonlinear free surface motions close to a verrical wall Influence of a local varying bathymetry
Sturova I.V. 181
Time-dependent hydroelastic response of an elastic plate floating on shallow water of variable depth
Sun H . and Faltinsen O.M. 185
Hydrodynamic forces on a planing hull in forced heave or pitch motions in calm water
Taylor P.H., Zang J., Walker A.G. and Eatock Taylor R. 189
Second order near-trapping for multi-column stmctures and near-flat QTFS
Thompson L , Linton C. M. and Porter R. 193
A new approximation method for scattering by large arrays
Tuitman J . and van Aanhold H. 197
Using generalized modes for time domain seakeeping calculations
Vanden-Broeck J.-M., Parau E . and Cooker M. 201
Three-dimensional capillary-gravity waves generated by moving distinbances
Zang J . , Ning D., Liang Q., Taylor P.H., Borthwick A.G.L. and Eatock Taylor R. 203
Modelling wave-coastal structm-e interactions using a Cartesian cut cell method
