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Book Cover
Author Holmes, John J., 1951-

Title Modeling a ship's ferromagnetic signatures / John J. Holmes
Edition First edition
Published [San Rafael, Calif.] : Morgan & Claypool Publishers, [2007]
Online access available from:
Synthesis Digital Library    View Resource Record  


Description 1 online resource (vii, 75 pages)
Series Synthesis lectures on computational electromagnetics ; #16
Synthesis lectures on computational electromagnetics (Online) ; #16
Contents 1. Introduction -- Reference -- 2. Basic equations -- 2.1 Basic equations of electromagnetics -- 2.2 Coordinate systems -- 2.3 Prolate spheroidal coordinate system -- 2.4 Solution to Laplace's and Poisson's equation in prolate spheroidal coordinates -- References -- 3. First-principal models -- 3.1 Spherical model of a vessel's hull -- 3.2 Prolate spheroidal model of a vessel's hull -- 3.3 Dipole moments and their units -- 3.4 Mathematical models of a degaussing coil -- 3.5 Numerical models -- 3.6 Ferromagnetic physical scale models -- References -- 4. Semiempirical models -- 4.1 Forward models -- 4.2 Inverse models -- References -- 5. Summary -- References -- Appendix I. References -- Appendix II. Author biography
Summary Ferromagnetic models of ships and submarines that predict or reproduce their magnetic signatures have found applications in the development of both offensive and defensive military systems from World War II to the present. The mathematical basis of generalized coordinate systems will be presented and demonstrated with example applications to analytic spherical and prolate spheroidal magnetic ship models. In addition, the advantages and pitfalls of using complex finite-element- and boundary-element numerical techniques to predict high-order near-field ship signatures will be discussed, followed by a short description of the design and testing of complementary physical scale models. Extrapolation of measured magnetic signatures from testing environments to threat areas using semi-empirical math models will be presented, along with an explanation of their inherent instabilities and methods for regularizing them. These magnetic ship signature modeling techniques are used today in designing optimized signature reduction systems that have a minimum impact on ships and their systems. The discussion will be closed with an important discussion of the verification and validation of magnetic models of surface ships and submarines
Notes Title from PDF title page (viewed June 13, 2007)
Bibliography Includes bibliographical references
Notes Print version record
Subject Boundary element methods.
Ferromagnetism -- Mathematical models.
Finite element method.
Magnetism of ships -- Mathematical models.
Form Electronic book
ISBN 159829251X (electronic bk.)
9781598292510 (electronic bk.)