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. Firstprincipal 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 finiteelement and boundaryelement numerical techniques to predict highorder nearfield 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 semiempirical 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.) 
