Proceedings of the 11th Symposium on Naval Hydrodynamics, London, United Kingdom (summary)

C O N T E N T S

Preface

R. D. Cooper

Introduction

R. E. D. Bishop, A. G. Parkinson, W. G. Price

Welcoming Address

The Right Hon. Lord Annan

Welcoming Address

S. Koslov

Welcoming Address

R. J. Daniel

Corrigenda

SESSION I

M O D E R N E X P E R I M E N T A L TECHNIQUES (1)

Transicnl-manciivcr testing and the equations o f m.Tneuvcring. bv T . Frank, D . J. Loeser, C. A , Scragg, O. J. Sibul, W . C. Webster, and J. V . Wehausen

Advanced experimental techniques f o r testing ship models in transient water waves. Part 1 The transient test technique on ship motions In waves, by S. Takezawa and M . Takekawa Advanced experimental techniques f o r testing ship models In transient water waves. Part I I The

controlled transient water waves f o r using in ship m o l i o n tests, by S. Takezawa and T . Hirayama

Experimental techniques and methods o f analysis used at Hydronaulics f o r surface-ship manoeuvring predictions, by A . G o o d m a n , M . Gertler. and R. K o h l

C P M C — A novel facility I'or planar m o t i o n testing of ship models, by O. G r i m , P. O l i m a n n , S. D . Sharma, and K . WolIT

Discussions and A u t h o r s ' replies

SESSION I I

M O D E R N E X P E R I M E N T A L TECHNIQUES (2)

The 'Wavedozer': a travelling beam wavemaker, by N . Hogben

A n experimental investigation o f the three-dimensional turbulent boundary layer on a ship model, by L . Larsson

The ultimate half roll before capsize o n the analog computer, by K . K u r e , H . Ketclsen and V . Jensen

The roles o f flow transition, laminar separation, and turbulence stimulation in the analysis o f axisymmetric body drag, by J. H . M c C a r t h y , J. 1,. Power, and T . T . H u a n g

Random wave generation f o r research o n immersed marine vehicles, by J. H . van Oorschot and F. K o o p m a n s

Discussions and A u t h o r s ' replies

SESSION I I I

M A R I N E VEHICLES I N WAVES

.Some aspects o f ship motions and impulsive wave loads on an ore carrier model in two-directional cross waves, by H . Kitagawa

A p p l i c a t i o n o f the f u n c t i o n a l p o l v n o m i a l model to the ship added resistance p r o b l e m , by J. F. Dalzell

Numerical solution o f unsteady ship wave problems, by R. C - K . Chan and J. H . Stuhmillcr Two-dimensional and c o n d i t i o n a l d i s t r i b u l i o n laws o f sea wave components, by I . K . Boroday

and Y a . M . K u b l a n o v

Three-dimensional calculations o f wave forces hy a hybrid element method, by D . K . P, Yue, H . S. Chen and C. C. M e i

The second-order steady force a n d moment on a ship moving in an oblique seaway, by W e n - C h i n L i n and A . Reed

Discussions and A u t h o r s ' replies V

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SESSION IV

U N C O N V E N T I O N A L CRAFT

Some aspects o f sidehull hydrodynamics and maneuvering in the design o f surface effect ships,

by R. B. Wade and S. Wang 355 The effect o f air compressibihty on the nonlinear m o l i o n o f an air-cushion vehicle over waves,

by L . J. Doctors 373 Some aspects o f h y d r o f o i l motions and their implications f o r crew performance, by D .

Johnson, L . T . Messum, and K . Nicholson 389 Wave impacts on h y d r o f o i l ships and structural implications, by T. G . D r u m m o n d , M .

Mackay, and R. T. Schmltke 397 A n experimental study o f a supervcntilated finite aspect ratio h y d r o f o i l near a free surface, by

O. Furuya and A . J. Acosta 415 The results o f the experimental investigation on the skirt parameters influence on resistance and

stability characteristics o f a hovercraft, by E. Brzoska, L . K o b y l i n s k i , M . Krezelewski, and

K . Paul 441 The use o f oscillators to obtain hydrodynamic and structural load data f o r SES craft, by

P. Kaplan, S. Davis, and A . M a l a k h o f f 45I Discussions and A u t h o r s ' replies 47J

SESSION V

G E N E R A L H Y D R O D Y N A M I C S

The interaction o f stationary vessels w i t h regular waves, by J. N . N e w m a n 4 9 I A theory f o r wave power absorption by oscillating bodies, by D . V . Evans 503 Finite-amplitude unsteady slender-body fiovj theory, by T. Y . W u and G . T . Yates 517 On the virtual mass, at long wavelengths, o f a half-immersed circular cylinder heaving on water

o f finite depth, by P. Sayer and F, Urscll 529 Prediction o f free-surface effects o n ship manoeuvring, by R. B. Chapman 533

Velocity potentials o f submerged bodies near a free surface-application to wave-excited forces

and motions, by M , S. Chang and P. C. Pien 545

Discussions and A u t h o r s ' replies 555

S E S S I O N V I

STRUCTURAL D Y N A M I C S

Wave and structural load experiments f o r elastic ships, by R. Wereldsma and G . Moeycs 557 Theoretical prediction o f the vertical dynamic response of ships structures using f i n i t e elements

and correlation with ship m o b i l i t y , by D . Catlcy and C. N o r r i s 587 L o w frequency second order wave forces on vessels moored at sea, by J. A . Pinkster go3

Elastic structural response o f semisubmersibles in regular waves, by K . Yoshida and K .

Fshlkawa 6] 7

Discussion and A u t h o r s ' replies g ^ j

S E S S I O N VII

M A R I N E VEHICLES I N RESTRICTED WATERS

Ship-ship interaction in shallow water, by I . W . Dand 637 The effects o f the restricted waters on the added mass o f a rectangular cylinder, by M . F u j i n o 655

Interaction effects o f ships operating in p r o x i m i t y in deep and shallow water, by M . A .

A b k o w i i z , G . M . Ashe, and R, M . Fortson 671 Some characteristics o f flow around ships at different d r i f t angles in shallow water, by V. N .

Treshchevsky and A . I . K o r o t k i n 693 Discussion and A u t h o r s ' replies 705

S E S S I O N vra

UNSTEADY PROPULSION

L o w frequency variation o f the surface shape o f tip region cavitation on marine propeller blades

and corresponding disturbances on nearby solid boundaries, by T . Sontvedt and H . Frivold 717

Some ideas about the o p t i m i z a t i o n of unsteady propellers, by J. A . Sparcnberg 731 Steady and unsteady loadings and hydrodynamic forces on counterrotating propellers, by S.

Tsakonas, W . Jacobs, and M . A l i 745 V i b r a t i o n excitation forces f r o m a cavitating propeller. M o d e l and f u l l scale tests o n a high speed

container ship, by C - A . Johnsson, O, Rutgersson, S. Olsson, and O. B j ö r h e d e n 757 Experimental determination o f mean and unsteady loads on a model CP propeller blade f o r

various simulated modes o f ship operation, by R, J. Boswell, J. J. Nelka, and S. B. Denny 789

Discussion and A u t h o r s ' replies 825