摘要
船舶和浮冰之间的碰撞往往会导致高压力,这使得在弹性设计准则下,船体需要过度的结构加强来确保安全。虽然目前其他领域中已经有一些根据载荷变形曲线获得极限载荷的准则,但造船行业中尚无公认的极限载荷准则。文章通过冰载作用下某极区船舶舷侧结构的非线性有限元分析,对比了不同的极限载荷准则下获得的极限冰载大小,确定了两倍弹性斜率法为其中最佳的极区船舶极限载荷准则。此外,结合冰级规范相关的安全性要求,文中对两倍弹性斜率法的合理性进行了验证。研究成果可为极限载荷准则的选取提供参考,有助于目前冰区规范的完善。
Impacts between ships and ice floes often result in high pressures, which require exces-sive structure reinforcement under elastic design. Although several limit load criteria to obtain limit load from load/deflection curve were proposed in other fields, there is no unanimously adopted limit load criterion in the shipbuilding industry. By using nonlinear FE analysis results of the side struc-ture of an Arctic ship, different limit load criteria were compared and twice-elastic-slope method was determined to be the optimal limit load criterion for polar ships. Furthermore, the rationality of the twice-elastic-slope method was verified by the requirements of the ice class rules. This work can provide a reference for the selection of limit load criterion on strength assessment of polar ships and the findings are expected to contribute to the modification of the current ice class rules.
出处
《船舶力学》
EI
CSCD
北大核心
2014年第3期280-290,共11页
Journal of Ship Mechanics
