The Sloshing Effects of Partially Filled Liquid Tanks on the Crashworthiness in Ship Collision
Date Issued
2014
Date
2014
Author(s)
Wu, Sheng-Yang
Abstract
The sloshing phenomenon is a flow impact inside a fluid tank with a free surface and is a very complicated fluid dynamics problem. Partial filled fluid tank in ship will induce sloshing effect to impact the tank periodically when the ship is in time varied motion. In order to protect the ocean environment and to promote the crew''s safety, as well as to minimize and damage after accident, some designs for anti-collision has been taken into consideration. In this paper, the sloshing effect of the partially filled fluid tank in container ships on the crashworthiness in ship collision was investigated. The sloshing impact in the rectangular tank was analyzed. And an equivalent mass-spring-damper system model to simulate the periodic sloshing impact induced by specified has been derived. The 8000 TEU container ship with partially filled fluid tank was selected as case .The structural damage and the crashworthiness of structures for container ship''s bow striking the engine room section of the 8000TEU container ship have been investigated. The structural damage among five partially filled conditions after striking were compared. The LS-DYNA nonlinear finite element analysis program was used to analyze the ship collision in the paper. The results show that the partial filled fluid in side tank can improve the crashworthiness of struck the ship structures. On the contrary, the partial filled fluid in bow tank can not improve the crashworthiness of struck the ship structures.
Subjects
自由液面
沖激現象
等效質量-彈簧-阻尼模型
船舶碰撞
抗撞能力
Type
thesis
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