Proceedings of the International Union of Theoretical and Applied Mechanics, Memorial Symposium on the Dynamics of Marine Vehicles and Structures in Waves held at the Brunel University, Developments in Marine Technology 7 (summary)

P1991-5

D e v e l o p m e n t s in M a r i n e T e c h n o l o g y , ?

Dynamics of

IVIarine Vehicles and

DEVELOPMENTS IN MARINETECHNOLOGY

Vol. 1 Marine and Offshore Safety (P.A. Frieze, R.C. McGregor and I.E.

Winkle, Editors)

Vol.2 BehaviourofOffshoreStructures(J.A.Battjes,Editor)

Vol. 3 Steel in Marine Structures (C. Noordhoek and J. de Back, Editors)

Vol. 4 Floating Structures and Offshore Operations (G. van Oortmerssen,

Editor)

Vol. 5 Nonlinear Methods in Offshore Engineering (S.K. Chakrabarti,

Editor)

Vol.6 CFD and CAD in Ship Design (G. van Oortmerssen, Editor)

Vol.7 Dynamics of Marine Vehiclesand Structures in Waves (W.G. Price,

RTemarel and A. J . Keane, Editors)

TECHNISCHE UNIVERSITEIT

Laboratorium voor

Scheepshydromechanica

Developments in IVlarineTechnology, 7 Archief

Mekelweg 2, 2628 CD DeHt

Dynamics of

Marine Vehicles and

Structures in Waves

Proceedingsofan International Union ofTheoretical and AppliedMechanics

Memorial Symposium on the Dynamics of Marine Vehicles and Structures in Waves

held at Brunei University, Uxbridge, U.K., 24-27 June, 1990

Edited by

W. G. Price

Department of Ship Science, University of Southampton

P. Temarel

Department of Mechanical Engineering, Brunei University

A. J . Keane

Department of Engineering Science, University of Oxford

Sponsored by

Office of Naval Research (London and Washington D.C.)

The Royal Institution of Naval Architects

ELSEVIER

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L i b r a r y of Congress C a t a l o g l n g - t n - P u b l I c a t i o n Data I n t e r n a t i o n a l Synposluri on the Dynaslcs of Marine V e h i c l e s and

S t r u c t u r e s In Waves (2nd : 1990 : Brunei U n i v e r s i t y )

Dynaslcs of marine v e h i c l e s and s t r u c t u r e s In Haves : proceedings of an I n t e r n a t i o n a l Union of T h e o r e t i c a l and Applied Mechanics Memorial Symposium on the Dynamics of Marine V e h i c l e s and S t r u c t u r e s

in Haves, held at Brunei U n i v e r s i t y . Uxbridge, U . K . , 24-27 June. 1990 / edited by H.G. P r i c e , P. Temarel, A . J . Keane ; sponsored by O f f i c e of Naval Research (London and Washington, D . C . ) [and] the Royal I n s t i t u t i o n of Naval A r c h i t e c t s .

p. cm. — (Developments In marine technology : v o l . 7 ) I n c l u d e s Index.

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1. Ships—Hydrodynamics—Congresses. 2 . Offshore s t r u c t u r e s --Kydrodynamlcs—Congresses. 3 . Wave r e s i s t a n c e (Hydrodynamles)-- C o n g r e s s e s . I. P r i c e , H. C. I I . Temarel, P. I I I . Keane. A. J . I V . I n t e r n a t i o n a l Union of T h e o r e t i c a l and Applied Mechanics. V United S t a t e s . O f f i c e of Naval R e s e a r c h . V I . Royal I n s t i t u t i o n of Naval A r c h i t e c t s . V I I . T i t l e . V I I I . S e r i e s : Developments In marine technology ; 7 .

VM156.I57 1990

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D. W. Cumming on page 81. ® Canadian Government (Department of National Defence), 1991. I S B N : 0-444-89020-3

e E L S E V I E R S C I E N C E P U B L I S H E R S B.V., 1991

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To

the Memory of

Dick

Professor Richard Evelyn Donohue Bishop, Vice Chancellor and Principal of Brunei University, died after a short illness at the Queen Alexandra Hospital, Portsmouth on Tuesday 12 September 1989. Although he had suffered a mild heart attack some 14 months earlier, his death was caused by the combined effects of an hepatic abscess and septicaemia.

To some of us present today he may be known by his distinctive name, R E D Bishop, on the top of a paper, on the cover of a book or as an editor of a learned journal; to others as Professor Bishop and to the majority of us attending this Symposium, simply as 'Dick', a colleague and friend.

Dick had a fine, clear mind which brought him significant achievements and honours in the scientific world. He was a Commander of the British Empire, a Fellow and Vice-President of The Royal Society, A Fellow of the Fellowship of Engineering, a Fellow of the Institution of Mechanical Engineers and a Fellow of the Royal Institution of Naval Architects. Without doubt, he was a distinguished member of our community with an international reputation, both in mechanical engineering and naval architecture.

Many of us have our different memories of Dick but I am sure we all agree that in technical matters he was a man of vision blessed with the rare ability to discuss the principles of engineering and mathematics. He sought academic excellence and scholarship in the tasks he set himself and he had the ability to take a complex dynamics problem and reduce it to a discussion or analysis of the fundamental principles involved. When asked what he was, the usual reply was " a dynamicist and a sort of engineer'. There is no doubting his love for dynamics. He enjoyed change - even change for change's sake - and quickly became bored with statics and even the steady state.

Dick thrived on discussion and debate - not argument - though at times this fine distinction depended on the sensitivity of the listener! This characteristic was much appreciated by me during our close technical collaboration for nearly twenty years. His loss is greatly felt though I was extremely pleased to be informed by the Secretariat of the International Union of Theoretical and Applied Mechanics that it had been decided to dedicate this meeting to the memory of Dick. A richly deserved tribute to an individual who gave much, had much more to contnbute but regrettably was unable to do so.

As I look around, it is a fitting tribute to Dick and a measure of your esteem for him, to see so many of his friends gathered here this morning, especially the large number of visitors from overseas, making this a truly International meeting. Since his death, Dick's widow Liz, my colleagues and I have been greatly appreciative of the large number of messages of condolence and support received from friends and acquaintances throughout the world, many of whom are present. We thank you all. ^. ,

Therefore, before declaring this International Union of Theoretical and Applied Mechanics Memorial Symposium to Professor R.E.D. Bishop open, I ask you lo stand and in the moments of silence pay tribute to the memory of my fellow chairman, close friend and colleague, the late Dick Bishop.

W.G. Pnce 25 June 1990

P R E F A C E

In 1974, Professor R.E.D. Bishop and I organised the first International Symposium on the Dynamics of Marine Vehicles and Structures in Waves. This meeting was held in the Department of Mechanical Engineering, University College London and the internationally renowned, invited audience comprised of engineers and scientists who were specialists in fluid dynamics or structures associated with marine vehicles, but seldom in both. The gathering of these experts proved very successful and rewarding since we were able to appreciate one another's problems, thus creating a conducive atmosphere to discuss the motions and strength of marine vehicles rather than the motions of marine vehicles or the strength of marine vehicles. That is, the meeting provided a forum which broke down this traditional man-made division and produced an exchange of ideas accompanied by a lively and fruitful discussion relating to the dynamics of ships and offshore structures.

In the intervening years much of the material presented in the first meeting has filtered into our everyday literature on naval architecture. As a direct outcome of this success and the research activities of naval architects worldwide, we decided it timely and appropriate to organise a second International Symposium on the Dynamics of Marine Vehicles and Structures in Waves.

This Symposium was sponsored by the International Union of Theoretical and Applied Mechanics in conjunction with the Office of Naval Research and the Royal Institution of Naval Architects. It was held in the Department of Mechanical Engineering at Brunei University on 24th-27th June 1990. Delegates to the meeting came from 21 countries and the connoisseur will perceive in the list of those present that many of the established authorities in the field of marine vehicle dynamics attended.

It was decided to retain the successful formula of the first meeting and to invite distinguished speakers who would produce scholarly papers which would greatly stimulate the invited participants. The chosen general theme of the meeting was Continuum Mechanics and the volume contains contributions relating to the environment, the mechanics associated with the interface, hydroelasticity, linear and non-linear dynamics problems with reference to chaos theory, experimental techniques and other methods of validation of software. It was a remarkable experience to organise a gathering in which each speaker spoke for the allotted time and all papers attracted an over abundance of discussion. Regrettably this cannot be reflected in this volume neither can the very friendly atmosphere which pervaded all the technical sessions and social functions.

This symposium was first discussed with an International Scientific Committee consisting of:

Dr. J.C. Dern (France)

Professor O. Faltinsen (Norway) Professor J . Gerritsma (Netherlands) Professor A.A. Kaminer (USSR) Professor Sir James Lighthill (U.K.) Professor H. Maeda (Japan)

Professor O. Mahrenholtz (Germany) Dr. W.B. Morgan (U.S.A.)

The general outline of the meeting Committee:

Mr. J.G. Beaumont

Professor W.R. Eatock Taylor Professor J.M.T. Thompson Professor F. Ursell

Professor J.N. Newman (U.S.A.) Dr. E.P. Nikolaev (USSR)

Professor R. Paulling (U.S.A.) Professor W.R. Eatock Taylor (U.K.) Professor E.O. Tuck (Australia) Professor Wu Yousheng (China) Professor R.E.D. Bishop (U.K.) Professor W.G. Price (U.K.)

was agreed by a Local Organising

Professor R.E.D. Bishop (Chairman) Professor W.G. Price (Chairman) Dr. P. Temarel (Treasurer) Dr. A.J. Keane (Secretary)

The 27 papers presented in the five technical sessions were chaired by:

Professor J.M.T. Thompson (U.K.) Professor Dr. S.D. Sharma (Germany) Ing. W. Beukelman (Netherlands) Professor C C . Mei (U.S.A.)

Professor P. Terndrup Pedersen (Denmark) Professor K. Yoshida (Japan)

Professor J.L. Armand (France) Professor W.R. Eatock Taylor (U.K.) Professor W.C. Webster (U.S.A.) Professor M. Schmiechen (Germany),

all of whom greatly contributed to the success of the meeting by their sympathetic though firm handling of the speakers and their encouragement of participation from the audience.

A Symposium dinner was held at Brunei University at which the principal guests were Mrs. Liz Bishop (Professor Bishop's widow) and Professor Sir James and Lady Lighthill. The after dinner address was given by Professor Lighthill, the retiring President and current Vice -President of the International Union of Theoretical and Applied Mechanics.

The technical sessions were complemented by a practical study of ship dynamics with a boat trip down the Thames from Putney to Greenwich, through the heart of the City of London, for a visit to the Greenwich Maritime Museum and The Observatory.

To organise an international symposium requires a hardworking and enthusiastic team. This I had the privilege to lead and I am very grateful to Dr. Pendeli Temarel and Dr. Andrew Keane for sharing the responsibilities; to Margaret Baguley for her secretarial help; to my daughters Sian and Rhiannon who assisted in hosting the social programme and to staff and colleagues in Brunei University for all their support. I am deeply indebted to Mrs Jean Ingram for her continued assistance and patience during all phases of the organisation. I thank you all.

CONTENTS

Tribute to Professor R.E.D. Bishop, CBE, F.Eng., FRS. Preface

Influence of wave climate modelling on the long-term prediction of wave induced responses of ship structures

C. Guedes Soares and M.F.S. Trovao Ocean wave data analysis and ship dynamics A E . Myneti and JA. Keuning

Some mathematical contributions to waves and ships

F. Ursell

Short-wave excitation of long waves in a basin

Chiang 0. Mei

Time-domain analysis for predicting ship motions

Robert F. Beck and Allan R. Magee

First and second order forces on SWATH ships in waves

H.H. Chun and R.C. McGregor

Load, motion and structural response trials of the SWATH vessel •FREDERICK G. CREED'

W.G. Pegg. LE. Gilroy and D.W. Cumming

The hull roughness problem

A.J. Musker

Applications of high-level, Green-Naghdi theory to fluid flow problems

William C. Webster and Jonathan J. Shields

The evaluation of steady fluid forces of single and multiple bodies in low speed flows using viscous boundary elements

W.G. Price and Ming-yi Tan

Coupled bending and twisting vibrations of beam like structures S. Miao and W.G. Price

Hydroelastic responses of a membrane stmcture in waves

Toichi Fukasawa

Two engineering approaches to hydroelastic analysis of slender ships

Yousheng Wu. Jinzhu Xia and Shuangxing Du

Currents and wave forces on ships and marine stmctures

Fourier-Koching representation of the flow due to a ship advancing in regular waves

Francis Noblesse and Dane Hendrix

Drift forces, moment and wave drift damping in multidirectional seas. A theoretical and experimental study

Jorgen R. Krokstad

Second order forces on a floating body: the effect of second order potential

R. Cazzulo, M. Dogliani and L Sebastiani

Statistical properties of slow drift motion of a vessel moored in random seas

Takeshi Kinoshita, Satoru Takase and Shunji Kato

Low frequency damping: the development of its theoretical prediction

Grant E. Hearn

Assessment of the validity of computer models for the prediction of dynamics of floating stmctures

G. van Oortmerssen

The verification and validation of numerical models, with examples taken from wave diffraction theory, wave loading and response

R.G. Standing

Prediction of non-linear wave-induced loads on ships

J. Juncher Jensen, J. Buus Petersen and P. Terndrup Pedersen 'On the nonlinear motions of ships and structures in narrow band sea

Alberto Francescutto

Distribution of maxima of nonlinear ship rolling

Jean-Louis Armand and Christophe Duthoit

Nonlinear oscillations and chaos at a SDOF-system under a regular wave packet

Sava Kisliakov

Transient basins: a new tool for designing ships against capsize

J.M.T. Thompson