Hybrid Computation of Low-Frequency Field Penetration Through Open Ended Metallic Cylinders
Morgan, Michael A.
MetadataShow full item record
Computation of low-frequency field penetration through conducting and magnetic materials is important for accessing interference within devices and facilities. Another use is the prediction of naval vessel vulnerability to detection caused by the field signatures of their internal electrical machinery. A hybrid procedure is used for predicting the penetration of low-frequency fields through a cylindrical structure. The structure is assumed to be rotationally symmetric but otherwise can be inhomogeneous, including layers or rings of differing material. The internal source is an axially oriented multi-turn coil. Field computation is formulated using a finite element solution within the interior region coupled to a spheroidal field expansion in the unbounded exterior. Comparisons are made to field measurements for a coil inside a steel pipe at frequencies of 1Hz and 50Hz.
Showing items related by title, author, creator and subject.
Song, G.; N. Buck; Agrawal, B.N. (1997);Minimizing vibrations of a exible spacecraft actuated by on-off thrusters is a challenging task. This paper presents the rst study of pulse-width pulse-frequency modulated thruster control using command input shaping. ...
Hollinger, Kenneth B. (Monterey, California. Naval Postgraduate School, 2009-12);This thesis investigates optimizing the speed of computation for computing the Choi-Williams distribution. The Choi-Williams distribution is a way of simultaneously representing a signal in both the time and frequency ...
Applied Computational Electromagnetics Society Journal. Special Issue on International Computational Electromagnetics / Volume 12, Number 1 Bastos, Joao P.; Konrad, Adalbert; Brauer, John; Naval Postgraduate School, Monterey CA (1997-01);Partial contents: 3B Splines In the Integral Equation Solution for Scattering from Bodies of Revolution; Electromagnetic Properties of a Chiral Plasma Medium; MTRT - A Modified Transverse Resonance Technique; Effect of the ...