Failure analysis of double hull structure in ship collision
Date Issued
2006
Date
2006
Author(s)
Chen, Jian-Bang
DOI
zh-TW
Abstract
Collision and grounding may cause serious injury of ship structure and oil pollutions on the sea. In order to prevent this kind of disaster and reduce the loss, the US Coast Guard introduced the design of double-hull tankers to avoid the leakage of oil from the struck ship fifteen years ago. The mechanics of ship collision and grounding are very complex topics because the complexity of ship structure, and multiple failure modes may occurred for damaged parts. In the past decades, the damage modes have been categorized into different fundamental modes, and the approximated methods have also been developed based on the combinations of suitable fundamental modes. The structures of double-hull tanker includes side plate, inner plate, stiffeners, web frame, decks and girder, it is necessary to understand the failure mechanism of each component and the interaction of each part. In this paper the formulae to approximate the energy dissipation and the impact resistance of a stuck double-hull structure based on Stretching mode and folding mode have been derived. The denting mode of girder and crushing mode of the crossing girder also been discussed. In this paper FEM analysis were compared with the simplified estimate formulae. The double-hull models from Wang(2000) was selected as care study. The damage process of double-hull structures was analyzed by FEM, the result of experiment, FEM analysis and simplified estimate formulae are compared. The results show that the proposed approximate method have acceptable accuracies.
Subjects
船舶碰撞
拉伸破壞
穿透破壞
摺皺破壞
壓潰破壞
雙層殼
ship collision
stretching mode
perforating mode
denting mode
double hull
Type
thesis