Hybrid Computation of Low-Frequency Field Penetration Through Open Ended Metallic Cylinders
Loading...
Authors
Morgan, Michael A.
Subjects
Advisors
Date of Issue
2007
Date
Publisher
Language
Abstract
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.
Type
Article
Description
Series/Report No
Department
Electrical and Computer Engineering
Organization
Identifiers
NPS Report Number
Sponsors
This research was funded by the Office of Naval Research under grant N00001407WR20052. Measurements were provided by Dr. Kimball T. Watts.
Funder
Format
Citation
Distribution Statement
Rights
This publication is a work of the U.S. Government as defined in Title 17, United States Code, Section 101. Copyright protection is not available for this work in the United States.