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The Study of the Failure Behavir of Ship Structure on Collision and Grounding.

船舶结构碰撞与搁浅失效行为研究。

基本信息

批准号：
06555296
负责人：
OHTSUBO Hideomi
金额：
$ 9.41万
依托单位：
THE UNIVERSITY OF TOKYO
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (A)
财政年份：
1994
资助国家：
日本
起止时间：
1994 至 1996
项目状态：
已结题

项目摘要

When the collision or grounding of tanker occur in the stormy sea, the spill of cargo oil can cause serious damage to the environment and called much attention worldwide recently. This study investigate the tanker structure that will reduce the possibility of oil spill when the tanker accidents occurs, and propose new standard for the regulations on tanker structure.First step is the clarification of the failure behavior. In the first year the crushing behavior of the bow structure in the case of collision was investigated based on the rigid body-plasticity hinge theory. The comparison with the experimental data is carried out to investigate the effect of the size of the welds and the dynamic effect and the speed dependency. A good agreement was observed for the experiments and analysis. The bow structure was divided into several simpler parts, namely L type, T type, and + type structure. The analysis of the energy absorption capability for each type of structure is made, and the comparison with the finite element analysis is made. This analysis for simple structure was extended to more complex structure by dividing the structure into several simple structures. The effect of the inclination of the bow structure was also investigated, and the method of deriving the crushing force for such structure is also considered, and simplified equations that can be used in early design stage are proposed.Also the failure behavior of the side structure that will occur when the ship is struck by other ship is investigated. The finite element analysis and comparison with experimental data is carried out to derive the equation of simplified method by rigid body-plastic hinge theory. Finally the risk analysis of double hull structure and middeck structure of tanker is made.

当油轮在风浪较大的海域发生碰撞或搁浅时，其所产生的溢油会对环境造成严重的危害，近年来引起了世界各国的广泛关注。本文研究了油轮事故发生时减少漏油可能性的油轮结构，并提出了油轮结构法规的新标准。第一步是明确失效行为。在第一年中，基于刚体塑性铰理论研究了船首结构在碰撞情况下的破碎行为。与实验数据的比较进行调查的焊缝的尺寸和动态效应和速度依赖性的效果。实验和分析观察到良好的一致性。船头结构分为几个简单的部分，即L型，T型和+型结构。对每种结构的吸能能力进行了分析，并与有限元分析结果进行了比较。将简单结构的分析扩展到更复杂的结构，将结构分解为多个简单结构。研究了艏部结构倾斜对船体结构的影响，并考虑了艏部结构破碎力的计算方法，提出了可用于早期设计的简化计算公式，还研究了船侧结构在与他船碰撞时的破坏行为。通过有限元分析，并与试验数据进行比较，推导出了用刚塑性铰理论简化的计算公式。最后对油船双层船体结构和中甲板结构进行了风险分析。