Crashworthiness and Anti-Shock Performance of Water Filled Double Hull Structure
Date Issued
2012
Date
2012
Author(s)
Peng, Chun-Kai
Abstract
The conventional ship structure is single hull in general, except of specified purpose, eq. water tank, oil tank etc. In recent years, the double hulls are taken into consideration in Bulk carriers and Tanker due to the protection of sea pollution after accident. Because of the development of laser welding technology, the metal sandwich structures have been proposed, and the traditional single hull structure can be replaced by smaller depth and lighter weight double hull. In recent years, people pay more attention to the anti-shock ability of ship. Accordingly, the anti-explosion performance in double hulls ship was concerned. In this research, the anti-shock property and the performance of reducing shock for double hulls with different fluid filled were studied, and the transfer mobility and anti-shock property of shock wave in fluid were discussed.
In this study, firstly, the simulation for high speed under water explosion and low speed impact in ship collision were analyzed in order to understand the fundamental dynamic property of fluid and structure coupling in simplified tank structure. Secondly, the function of absorption, impedance and energy resetting provided by fluid in different fluid filling cases were understood. Finally, the dynamic property in different fluid filling case was employed in different double hulls ship.
The underwater shock analysis of double hulls filled with water shows that the water filling case has better effect on anti-shock than no water case. Moreover, the impact analysis of double hulls with water filling shows that the filling water in double hulls can provide a buffer to the damage at the impact moment which could be utilized in the layout of oil and water tank structure in the cabin.
Subjects
Water filled double hull
underwater explosion
anti-shock
ship collision
Fluid-structure interaction
Type
thesis
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