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Protection of naval systems against electromagnetic effects due to lightning

This study investigates possible lightning threats to naval crafts, especially those sailing in the shallow waters of tropical oceans where thunderstorms prevail throughout the year and Far-East Asian region where dangerous positive lightning is a significant characteristic in winter thunderstorms....

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Main Authors: Gomes, Chandima, Ab Kadir, Mohd Zainal Abidin
Format: Article
Language:English
Published: EMW Publishing 2011
Online Access:http://psasir.upm.edu.my/id/eprint/16377/1/Protection%20of%20naval%20systems%20against%20electromagnetic%20effects%20due%20to%20lightning.pdf
http://psasir.upm.edu.my/id/eprint/16377/
http://www.jpier.org/PIER/pier.php?paper=10111302
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spelling my.upm.eprints.163772019-11-21T06:44:22Z http://psasir.upm.edu.my/id/eprint/16377/ Protection of naval systems against electromagnetic effects due to lightning Gomes, Chandima Ab Kadir, Mohd Zainal Abidin This study investigates possible lightning threats to naval crafts, especially those sailing in the shallow waters of tropical oceans where thunderstorms prevail throughout the year and Far-East Asian region where dangerous positive lightning is a significant characteristic in winter thunderstorms. It is empathized that sea water acts as nearly a perfect conductor thus lightning electromagnetic transients propagate over the sea with almost zero attenuation of amplitude and high frequency components intact. The ratio between the peak electric fields at 5 km from the lightning channel, after fields propagate over dry soil and over sea water is 0.75. The ratio between the peak electric field derivatives under the same conditions is 0.1. Such small ratios are observed in the magnetic fields and their time derivatives as well. Apart from the conductivity, the topological irregularities of the plane over which propagation takes place also contribute to further attenuation of fields and their time derivatives. This makes marine naval systems more vulnerable to lightning induced effects than their ground-based counterparts. The paper discusses in detail the lapses of existing naval standards in the defense of electrical and electronic systems against both direct lightning currents and induced effects of nearby lightning. Consequently we propose the development of a dedicated standard for the lightning protection of naval systems, with the inclusion of several significant recommendations specified in this paper. EMW Publishing 2011 Article PeerReviewed application/pdf en http://psasir.upm.edu.my/id/eprint/16377/1/Protection%20of%20naval%20systems%20against%20electromagnetic%20effects%20due%20to%20lightning.pdf Gomes, Chandima and Ab Kadir, Mohd Zainal Abidin (2011) Protection of naval systems against electromagnetic effects due to lightning. Progress In Electromagnetics Research, 113. pp. 333-349. ISSN 1070-4698; ESSN: 1559-8985 http://www.jpier.org/PIER/pier.php?paper=10111302 10.2528/PIER10111302
institution Universiti Putra Malaysia
building UPM Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Putra Malaysia
content_source UPM Institutional Repository
url_provider http://psasir.upm.edu.my/
language English
description This study investigates possible lightning threats to naval crafts, especially those sailing in the shallow waters of tropical oceans where thunderstorms prevail throughout the year and Far-East Asian region where dangerous positive lightning is a significant characteristic in winter thunderstorms. It is empathized that sea water acts as nearly a perfect conductor thus lightning electromagnetic transients propagate over the sea with almost zero attenuation of amplitude and high frequency components intact. The ratio between the peak electric fields at 5 km from the lightning channel, after fields propagate over dry soil and over sea water is 0.75. The ratio between the peak electric field derivatives under the same conditions is 0.1. Such small ratios are observed in the magnetic fields and their time derivatives as well. Apart from the conductivity, the topological irregularities of the plane over which propagation takes place also contribute to further attenuation of fields and their time derivatives. This makes marine naval systems more vulnerable to lightning induced effects than their ground-based counterparts. The paper discusses in detail the lapses of existing naval standards in the defense of electrical and electronic systems against both direct lightning currents and induced effects of nearby lightning. Consequently we propose the development of a dedicated standard for the lightning protection of naval systems, with the inclusion of several significant recommendations specified in this paper.
format Article
author Gomes, Chandima
Ab Kadir, Mohd Zainal Abidin
spellingShingle Gomes, Chandima
Ab Kadir, Mohd Zainal Abidin
Protection of naval systems against electromagnetic effects due to lightning
author_facet Gomes, Chandima
Ab Kadir, Mohd Zainal Abidin
author_sort Gomes, Chandima
title Protection of naval systems against electromagnetic effects due to lightning
title_short Protection of naval systems against electromagnetic effects due to lightning
title_full Protection of naval systems against electromagnetic effects due to lightning
title_fullStr Protection of naval systems against electromagnetic effects due to lightning
title_full_unstemmed Protection of naval systems against electromagnetic effects due to lightning
title_sort protection of naval systems against electromagnetic effects due to lightning
publisher EMW Publishing
publishDate 2011
url http://psasir.upm.edu.my/id/eprint/16377/1/Protection%20of%20naval%20systems%20against%20electromagnetic%20effects%20due%20to%20lightning.pdf
http://psasir.upm.edu.my/id/eprint/16377/
http://www.jpier.org/PIER/pier.php?paper=10111302
_version_ 1651869012114538496
score 13.222552

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