Hydroelasticity of Ships

by Richard E. D. Bishop , W. G. Price

• ISBN13: 9780521017800
• ISBN10: 0521017807
• Format: Paperback
• Copyright: 2005-09-29
• Publisher: Cambridge University Press

Summary

A ship is a flexible structure that moves bodily and distorts when it encounters waves. This behaviour is potentially dangerous and it must therefore be predicted as a necessary part of ship design. Hitherto the theory of ship structures has had to employ simplifying assumptions, and the dynamical theory has been founded largely on the assumption of rigidity. This book, however, shows how the wave responses of a ship can be calculated using linear dynamics. This general treatment adapts the techniques of structural theory, hydrodynamics, oceanography and statistical theory to the needs of naval architecture. In a radically new departure the authors unify these various techniques in their systematic use of dynamical theory. The principles are applicable to offshore structures in general as well as to ships.

Table of Contents

Preface	vii
Ship response	1	(11)
The effects of waves on ships	1	(5)
Response to wave excitation	6	(4)
Excitation by machinery	10	(2)
The dry hull	12	(30)
Types of deflection	12	(1)
Symmetric response of a ship	13	(11)
Antisymmetric response of a boxlike ship	24	(7)
Antisymmetric response of ships with large deck openings	31	(9)
The principle of orthogonality	40	(2)
More accurate analysis of hull dynamics	42	(18)
Allowances for shear and rotatory inertia	42	(1)
Equations of symmetric motion	42	(6)
Equations of antisymmetric motion	48	(10)
Antisymmetric motion of a boxlike ship	58	(1)
General conclusions	59	(1)
The characteristics of practical hulls	60	(28)
Hull data	60	(1)
Data relevant to symmetric response	60	(27)
Data relevant to antisymmetric response	87	(1)
Ship distortion in still water	88	(10)
Hydrostatic fluid actions	88	(2)
Modal analysis	90	(2)
Results for particular ships	92	(6)
Wave theory	98	(22)
Waves on the sea surface	98	(1)
Fundamentals of hydrodynamics	98	(4)
Application to gravity waves	102	(1)
Linearised theory of gravity waves	103	(5)
The presence of a ship in sinusoidal waves	108	(4)
Waves of finite amplitude	112	(8)
Symmetric generalised fluid forces	120	(47)
Strip theory	120	(36)
Generalised forces	156	(3)
Discussion of the generalised fluid forces	159	(8)
Symmetric response	167	(70)
Receptances and response functions	167	(11)
Computations	178	(3)
Typical results	181	(23)
Particular features of ship response	204	(11)
Polar plotting of ship response	215	(22)
Transient loading	237	(38)
Some comments on slamming	237	(3)
Response to a unit impulse	240	(15)
The occurrence of slamming in regular waves	255	(2)
The application of `impact slamming' theory	257	(4)
The application of `momentum slamming' theory	261	(7)
Concluding remarks	268	(7)
Antisymmetric response to wave excitation	275	(51)
Antisymmetric wave forces	275	(1)
Relative motions of water and ship in oblique waves	276	(3)
The fluid actions	279	(4)
Generalised fluid actions	283	(4)
Special cases	287	(6)
Hydrodynamic coefficients	293	(7)
Results for a container ship	300	(26)
Statistical analysis of ship response	326	(62)
Random processes	326	(4)
Representation of an irregular seaway	330	(6)
The wave spectrum	336	(16)
Wave data	352	(5)
Probability density and statistical properties	357	(13)
Short-term response	370	(9)
`Long-term' description of waves	379	(9)
Responses of other marine structures to waves	388	(20)
Resonance of marine structures	388	(2)
Equations of motion of a buoyant column	390	(3)
Principal modes	393	(7)
Forced oscillation	400	(6)
Concluding remarks	406	(2)
Bibliography	408	(11)
Index	419