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lewis e principles naval architecture vol ii resistance vibration 1988

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Textbook in PDF format The aim of this second revision (third edition) of the Society’s successful Principles of Naval Architecture was to bring the subject matter up-to-date through revising or rewriting areas of greatest recent technical advances, which meant that some chapters would require many more changes than others. The basic objective of the book, however, remained unchanged: to provide a timely survey of the basic principles in the ﬁeld of naval architecture for the use of both students and active professionals, making clear that research and engineering are continuing in almost all branches of the subject. References are to be included to available sources of additional details and to ongoing work to be followed in the future. The preparation of this third edition was simpliﬁed by an earlier decision to incorporate a number of sections into the companion SNAME publication, Ship Design and Construction, which was revised in 1980. The topics of Load Lines, Tonnage Admeasurement and Launching seemed to be more appropriate for the latter book, and so Chapters V, VI, and XI became IV, V and XVII respectively, in Ship Design and Construction. This left eight chapters, instead of 11, for the revised Principles of Naval Architecture, which has since become nine in three volumes. At the outset of work on the revision, the Control Committee decided that the increasing importance of high-speed computers demanded that their use be discussed in the individual chapters instead of in a separate appendix as before. It was also decided that throughout the book more attention should be given to the rapidly developing advanced marine vehicles. In regard to units of measure, it was decided that the basic policy would be to use the International System of Units (8.1.). Since this is a transition period, conventional US. (or "English”) units would be given in parentheses, where practical, throughout the book. This follows the practice adopted for the Society’s companion volume, Ship Design and Construction. The US. Metric Conversion Act of 1975 (PL. 94-168) declared a national policy of increasing the use of metric systems of measurement and established the US. Metric Board to coordinate voluntary conversion to 8.1. The Maritime Administration, assmted by.a SNAME ad hoc task group, developed a Metric Practice Guide to “help obtain umforrn metric practice in the marine industry,” and this guide was used here as a basic reference. Following this guide, ship displacement in metric tons (1000 kg) represents mass rather than weight, (In this book the familiar symbol, A, is reserved for the displacement mass). When forces are considered, the corresponding unit is the kilonewton (kN), which applies, for example, to resistance and to displacement weight (symbol W, where W = pAg) or to buoyancy forces. When conventional or English units are used, displacement weight is in the famlhar long ton unit (2240 lb), which numerically is 1.015 x metric ton. Power is usually in kilowatts (1 kW = 1.34 hp). A conversion table also is included in the N omenclature at the end of each volume The ﬁrst volume of the third edition of Principles of Naval Architecture, comprising Chapters I through IV, covers almost the same subject matter as the ﬁrst four chapters of the preceding edition. Thus, it deals with the essentially static principles of naval architecture, leaving dynamic aspects to the remaining volumes. Chapter I deals with the graphical and numerical description of hull forms and the calculations needed to deal with problems of ﬂotation and stability that follow. Chapter II considers stability in normal intact conditions, while Chapter III discusses ﬂotation and stability in damaged conditions. Finally, Chapter IV deals with principles of hull structural design, ﬁrst under static calm water conditions, and then introducing the effect of waves which also are covered more fully in Volume III Chapter VIII, Motions in Waves. For Volume II it seemed desirable, on the basis of subject matter and space requirements, to include Chapter V, Resistance, Chapter VI, Propulsion and Chapter VII, Vibration. The ﬁrst two of these were covered in a single chapter in the preceding edition. The new chapters have been extensively revised, with considerable new material, particularly dealing with high performance craft and new propulsion devices. Chapter VII, Vibration, which is the third in Volume II, has been almost completely rewritten to take advantage of new developments in the ﬁeld. Preface. Acknowledgments. Resistance. Propulsion. Vibration. Nomenclature. Index

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lewis e principles naval architecture vol ii resistance vibration 1988

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