Tuesday, November 17, 2009

Ship Stability for Masters and Mates

Hydrostatics and Stability of ships are important subjects that are studied not only by naval architects but also by deck and engineering officers who are working aboard ships. The topics in this book are similar to the volume 1 of Basic Ship Theory and another ship theory book written by Russian naval scientists entitled Statics and Dynamics of the Ships.
I like this book very much because it provides a lot of worked examples ranging from simple up to complicated ones. The concept of mathematical integration using Simpsons' rules is introduced in page 68. These rules are used in most of the hydrostatics and volume calculations of ship forms.
Hydrostatic components such as form coefficients, ship displacement, center of buoyancy, center of gravity, metacenter height are discussed in the first few chapters of the book while more complicated subjects related to transverse stability, and effect of free surface of liquids on stability of ships are presented in later chapters of the book.


Although most of the ship form calculations are now executed using naval architecture and ship design software such as Maxsurf, Delftship and Fasthip, the author of the book deliberately provides samples of manual calculations to help students and practicing naval architects understand the philosophy and the theoretical foundation involved in ship theory and design.
The followings are the table of contents of the book
Preface vii
Introduction ix
Ship types and general characteristics xi
1 Forces and moments 1
2 Centroids and the centre of gravity 9
3 Density and speci®c gravity 19
4 Laws of ¯otation 22
5 Effect of density on draft and displacement 33
6 Transverse statical stability 43
7 Effect of free surface of liquids on stability 50
8 TPC and displacement curves 55
9 Form coef®cients 61
10 Simpson's Rules for areas and centroids 68
11 Final KG 94
12 Calculating KB, BM and metacentric diagrams 99
13 List 114
14 Moments of statical stability 124
15 Trim 133
16 Stability and hydrostatic curves 162
17 Increase in draft due to list 179
18 Water pressure 184
19 Combined list and trim 188
20 Calculating the effect of free surface of liquids (FSE) 192
21 Bilging and permeability 204
22 Dynamical stability 218
23 Effect of beam and freeboard on stability 224
24 Angle of loll 227
25 True mean draft 233
26 The inclining experiment 238
27 Effect of trim on tank soundings 243
28 Drydocking and grounding 246
29 Second moments of areas 256
30 Liquid pressure and thrust. Centres of pressure 266
31 Ship squat 278
32 Heel due to turning 287
33 Unresisted rolling in still water 290
34 List due to bilging side compartments 296
35 The Deadweight Scale 302
36 Interaction 305
37 Effect of change of density on draft and trim 315
38 List with zero metacentric height 319
39 The Trim and Stability book 322
40 Bending of beams 325
41 Bending of ships 340
42 Strength curves for ships 346
43 Bending and shear stresses 356
44 Simpli®ed stability information 372
Appendix I Standard abbreviations and symbols 378
Appendix II Summary of stability formulae 380
Appendix III Conversion tables 387
Appendix IV Extracts from the M.S. (Load Lines) Rules, 1968 388
Appendix V Department of Transport Syllabuses (Revised April 1995) 395
Appendix VI Specimen examination papers 401
Appendix VII Revision one-liners 429
Appendix VIII How to pass exams in Maritime Studies 432
Appendix IX Draft Surveys 434
Answers to exercises 437
Index 443