Crashworthiness of different types of bow structures in ship side structures collision

• Main Authors: Chia-Li Chang, 張嘉莉
• Other Authors: 洪振發
• Format: Others
• Language: zh-TW
• Published: 2011
• Online Access: http://ndltd.ncl.edu.tw/handle/26492413428975006814

碩士 === 國立臺灣大學 === 工程科學及海洋工程學研究所 === 99 === Collision and grounding may cause serious injury of ship structure and human beam, the oil may spill on the sea, nowadays in view of saving of the maritime environment and for crews security reasons. In order to prevent this kind of catastrophe and reduce the oil pollution, the double hull and mid-deck structures for tanker were requested, later 1990s 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 four different types of bow structures and bulk carrier of double hull structures in bow-side collision, and evaluated their crashworthiness, the effects of ship motion doing collision on the collision damaged was also taken into consideration. The phenomena of rupture and penetration of bow and bulk carrier 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.