글쓴사람과 댓글 쓴 사람중에 2함대에 작전해본 사람 손들어 봅시다. 아니 실제로 어뢰 보고 발사한거 본 사람 손 들어보세요.
해군 누구도 실제 어뢰로 배를 파괴해 본 사람 없습니다. 즉 모든게 자기 상상속 결과입니다. 가만히 서있는 배를 버블제트로 폭파한 호주영상보고 이게 원인이라고요? 당시 천안함은 움직이고 있었어요. 80년대 조선기술로 두조각을 이어붙인 배들은 버블젯으로 인한 두동강 위험이 항존했지만 움직이는데 그게 가능하다고? ㅋㅋㅋ 그 확률이 얼마나 작은지 모르면 가만계쇼. 진짜 웃기네. 천안함은 앞으로도 20년은 지나야 밝혀질 사항이니 입다물고 계쇼
Underwater Explosion Bubble Jetting Effects on Infrastructure:
Underwater explosions present a significant risk to structures because they were not designed for these types of loads and because water transmits explosive energy much more efficiently than air. The US Navy demonstrated that the effect of bubble jetting from an underwater explosion can result in significant late-time loading compared to the initial shock loading. However, neither the effects of bubble jetting on structures, where the explosion is likely to be lateral to the target rather than beneath it, nor the loading conditions required to produce bubble jetting effects on such structures (charge weight, submerged depth, and standoff distance to structure) are well understood. This investigation improves characterizations of bubble formation, collapse, and jetting near lateral targets. The research includes very small-scale tests to observe bubble jetting, slightly larger underwater blast experiments to determine bubble jetting loads on vertical structures, and larger-scale experiments to measure bubble jetting effects on the structural deformation to structures.
https://www.hindawi.com/journals/sv/2018/8456925/ Model Experimental Study of Damage Effects of Ship Structures under the Contact Jet Loads of Bubble in a Water Tank
The damage effects of ship structures under the contact jet loads of bubble are studied by using an electric spark bubble as well as high-speed photography. A series of model experiments of ship structures under contact explosion was carried out in a water tank. On the one hand, we monitored the displacement and period of the oscillation of a hull plate of a ship model with a large bending rigidity. On the other hand, we observed the overall motion of a box-beam model with a small bending rigidity. The results show that when the distance parameter is less than 0.6, the bubble jet will impact on the surface of the structure directly, which is defined as “contact bubble jet” herein. The contact bubble jet causes significant local loads on the ship and induces the “sagging moment” effect. This mainly results from the relatively negative bending moment caused by the bubble attached to the hull. With the increase of detonation distance, this negative bending moment decreases. As a result, the oscillation amplitude of the ship structure decreases sharply and the oscillation period reduces gradually.
작성일 : 21-06-15 00:17
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