Experimental investigations on small-and full-scale ship models with polyurea coatings subjected to underwater explosion
Experimental investigations on small-and full-scale ship models with polyurea coatings subjected to underwater explosion作者机构：State Key Laboratory Explosion Science and TechnologyBeijing Institute of TechnologyBeijing100081China
出 版 物：《Defence Technology（防务技术）》 (Defence Technology)
年 卷 期：2022年第18卷第7期
页 面：1257-1268页
核心收录：
学科分类：082601[工学-武器系统与运用工程] 08[工学] 0826[工学-兵器科学与技术] 0824[工学-船舶与海洋工程] 082401[工学-船舶与海洋结构物设计制造]
主 题：Polyurea coatings Small-scale model Full-scale ship Underwater explosion Blast resistance
摘 要：Nowadays, the mitigation of damage to a ship caused by the underwater explosion attracts more and more attention from the modern ship designers. In this study, two kinds of scale tests were conducted to investigate the effects of polyurea coatings on the blast resistance of hulls subjected to underwater explosion. Firstly, small-scale model tests with different polyurea coatings were carried out. Results indicate that polyurea has a better blast resistance performance when coated on the front face, which can effectively reduce the maximum deflection of the steel plate by more than 20% and reduce the deformation energy by 35.7%-45.4%. Next, a full-scale ship(approximately 50 m × 9 m) under loadings produced by the detonation of 33 kg of spherical TNT charges was tested, where a part of the ship was coated with polyurea on the front face(8 mm + 24 mm) and not on the contrast area. Damage characteristics on the bottom were statistically analyzed based on a 3D scanning technology, indicating that polyurea contributes to enhancing the blast protection of the ship. However, damage results of this test were different from those of the small-scale tests. Moreover, the deformation area of the bottom with polyurea was greatly increased by 40.1% to disperse explosion energy, a conclusion that cannot be drown from the small-scale tests.
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