【作者】 孙斌； 胡志强； 王晋；

【Author】 SUN Bin;HU Zhi-qiang;WANG Jin;State Key Laboratory of Ocean Engineering, Shanghai Jiao Tong University;COTEC Offshore Engineering Solution;

【机构】 上海交通大学海洋工程国家重点实验室； COTEC海洋工程公司；

【摘要】 以船底肋板为研究对象,运用塑性力学理论及数值仿真技术,分析了船底肋板在尖锐礁石搁浅场景下的变形损伤机理。研究中首先应用LS_DYNA进行数值仿真模拟,得到船底肋板的变形模态,在此基础上建立起肋板塑性变形的几何数学模型。然后运用塑性力学理论,获得船底肋板在变形过程中变形阻力的解析计算公式,并通过数值仿真结果进行验证。研究得到的船底肋板变形损伤的解析计算公式,对船底耐撞性结构设计和耐撞性能评估具有较好的指导意义。更多还原

【Abstract】 The deformation mechanism of ship bottom floor when the ship runs aground over sharp rocks is analyzed in this paper based on the plastic mechanics theory and the numerical simulation technique. Numerical simulation using the code LS_DYNA is first conducted for understanding the behavior of bottom floors and establishing the analytical models. Then the analytical expressions of the resistance of bottom floor are derived and the accuracy is verified by numerical simulations. The proposed analytical method can be used to predict the ship bottom structure crashworthiness during the structural design phase.更多还原