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Investigation of wedge water-entry under symmetric impact loads by experimental tests

One of the main challenges for engineers in designing high-speed crafts is the evaluation of hydrodynamic loads during the impact of hull to wave’s surface. This paper presents an experimental investigation on the pressure distribution on three wedge-sections with 15°, 20° and 30° deadrise during wa...

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Main Authors: Nikfarjam, M., Yaakob, O. B., Seif, M. S., Koto, J.
Format: Article
Language:English
Published: Brazilian Association of Computational Mechanics 2017
Subjects:
TJ Mechanical engineering and machinery
Online Access:http://eprints.utm.my/id/eprint/76784/1/OBYaakob2017_InvestigationofWedgeWaterEntryUnderSymmetric.pdf
http://eprints.utm.my/id/eprint/76784/
https://www.scopus.com/inward/record.uri?eid=2-s2.0-85019909804&doi=10.1590%2f1679-78253315&partnerID=40&md5=2791f1d19e8d3ec567761fb02d6fd677
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spelling my.utm.767842018-04-30T14:04:52Z http://eprints.utm.my/id/eprint/76784/ Investigation of wedge water-entry under symmetric impact loads by experimental tests Nikfarjam, M. Yaakob, O. B. Seif, M. S. Koto, J. TJ Mechanical engineering and machinery One of the main challenges for engineers in designing high-speed crafts is the evaluation of hydrodynamic loads during the impact of hull to wave’s surface. This paper presents an experimental investigation on the pressure distribution on three wedge-sections with 15°, 20° and 30° deadrise during water-entry. Assessment of pressure distribution on the effects of parameters such as drop heights, deadrise angles and the weights of the models had done. Time histories of impact pressure were recorded. It was showed that, the maximum pressure for 20° wedge had increased 2.4 times in comparison with 30° wedge while this number is 1.23 time for the 15° wedge. But the effects of weight and drop height were not as much as deadrise angle. The results give an appropriate approximation of the maximum pressures by the model resembling high-speed craft’s hull sections, which can be used to estimate impact loads in different operational condition. The condition of water level during the impact process has also been observed in each test. The nature of impact test with non-constant speed can clarify the real behavior of falling objects, which can be assumed as the significance of current study. Brazilian Association of Computational Mechanics 2017 Article PeerReviewed application/pdf en http://eprints.utm.my/id/eprint/76784/1/OBYaakob2017_InvestigationofWedgeWaterEntryUnderSymmetric.pdf Nikfarjam, M. and Yaakob, O. B. and Seif, M. S. and Koto, J. (2017) Investigation of wedge water-entry under symmetric impact loads by experimental tests. Latin American Journal of Solids and Structures, 14 (5). pp. 861-873. ISSN 1679-7817 https://www.scopus.com/inward/record.uri?eid=2-s2.0-85019909804&doi=10.1590%2f1679-78253315&partnerID=40&md5=2791f1d19e8d3ec567761fb02d6fd677 DOI:10.1590/1679-78253315
institution Universiti Teknologi Malaysia
building UTM Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Teknologi Malaysia
content_source UTM Institutional Repository
url_provider http://eprints.utm.my/
language English
topic TJ Mechanical engineering and machinery
spellingShingle TJ Mechanical engineering and machinery
Nikfarjam, M.
Yaakob, O. B.
Seif, M. S.
Koto, J.
Investigation of wedge water-entry under symmetric impact loads by experimental tests
description One of the main challenges for engineers in designing high-speed crafts is the evaluation of hydrodynamic loads during the impact of hull to wave’s surface. This paper presents an experimental investigation on the pressure distribution on three wedge-sections with 15°, 20° and 30° deadrise during water-entry. Assessment of pressure distribution on the effects of parameters such as drop heights, deadrise angles and the weights of the models had done. Time histories of impact pressure were recorded. It was showed that, the maximum pressure for 20° wedge had increased 2.4 times in comparison with 30° wedge while this number is 1.23 time for the 15° wedge. But the effects of weight and drop height were not as much as deadrise angle. The results give an appropriate approximation of the maximum pressures by the model resembling high-speed craft’s hull sections, which can be used to estimate impact loads in different operational condition. The condition of water level during the impact process has also been observed in each test. The nature of impact test with non-constant speed can clarify the real behavior of falling objects, which can be assumed as the significance of current study.
format Article
author Nikfarjam, M.
Yaakob, O. B.
Seif, M. S.
Koto, J.
author_facet Nikfarjam, M.
Yaakob, O. B.
Seif, M. S.
Koto, J.
author_sort Nikfarjam, M.
title Investigation of wedge water-entry under symmetric impact loads by experimental tests
title_short Investigation of wedge water-entry under symmetric impact loads by experimental tests
title_full Investigation of wedge water-entry under symmetric impact loads by experimental tests
title_fullStr Investigation of wedge water-entry under symmetric impact loads by experimental tests
title_full_unstemmed Investigation of wedge water-entry under symmetric impact loads by experimental tests
title_sort investigation of wedge water-entry under symmetric impact loads by experimental tests
publisher Brazilian Association of Computational Mechanics
publishDate 2017
url http://eprints.utm.my/id/eprint/76784/1/OBYaakob2017_InvestigationofWedgeWaterEntryUnderSymmetric.pdf
http://eprints.utm.my/id/eprint/76784/
https://www.scopus.com/inward/record.uri?eid=2-s2.0-85019909804&doi=10.1590%2f1679-78253315&partnerID=40&md5=2791f1d19e8d3ec567761fb02d6fd677
_version_ 1643657407865290752
score 13.23648

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