Crashworthiness of different types of double hull and bow structures in ship collision
Date Issued
2010
Date
2010
Author(s)
Huang, Yun-Tzu
Abstract
To reduce the damages of structures, injure of crews and loss of cargoes in ship collision, and also to avoid the consequent environment catastrophe, the double hull and mid-deck structures for tanker were requested, and the conventional single hull structures consisted of stiffened plates with deep girders were replace by different types of double hull in some cases; in last decade, the soft bow concept was also proposed to reduce the stiffness of bow structures and improve the capacity of total energy dissipation of ship collision. This study investigated the deformation and damage process of bow and double hull structures in bow-side collision, and evaluated their crashworthiness. The phenomena of rupture and penetration of bow and double hulls during ship collision were analyzed using LS-DYNA code. For outside shell and inside web plates, web frame and deck of bow structures, the damage mode and damage status were observed. In addition, their impact force and energy dissipation were compared. Four different types of hull structures were examined in this study, which are (a) the X-type core, (b) the Y-type core, (c) the flat core double hull and (d) the traditional stiffened plate.
The crashworthiness in ship collision of struck X-type core double hull and four types of bow structures were also inspected, and their reaction force and energy dissipation were compared.
Subjects
ship collision
double hull
bow
crash resistance
crashworthiness
Type
thesis
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