摘要
楔形船艏是船舶最常见的设计之一,船舶的舷侧结构遭受楔形船艏撞击事故时有发生,因而船侧外板结构的抗撞性能应予以足够重视。以船舶舷侧外板为研究对象,运用塑性力学理论和数值仿真技术,分析了舷侧外板结构在受到楔形船艏的撞击时的变形损伤机理;研究中应用LS_DYNA仿真模拟得到舷侧外板的变形模态和能量耗散情况,在此基础上建立起舷侧外板塑性变形的几何数学模型。运用塑性力学理论得到舷侧外板在变形过程中变形阻力的解析计算公式,经数值仿真验证其准确性;研究成果对船舶舷侧抗撞性结构设计具有指导意义。
As a raked bow is a common design,it is of great importance to accurately analyze the crashworthiness of a ship＇s side structure subjected to raked bow collision.The deformation mechanism of a ship side plating was analyzed here based on the plastic deformation theory and numerical simulation technique.The deformation mode and energy dissipation of the side plating impacted by raked bow were obtained through numerical simulation and using code LS _DYNA,and the plastie deformation model of the side plating was established.The analytical calculation formula for the resistance of the side plating deformation was derived and verified with numerical simulations.The results showed that the proposed analytical calculation method can provide a guide for ship side structure＇s crashworthiness design.
出处
《振动与冲击》
EI
CSCD
北大核心
2016年第23期46-50,79,共6页
Journal of Vibration and Shock
基金
国家自然科学基金项目(51239007)
关键词
船舶碰撞
楔形船艏
舷侧外板
解析计算
数值仿真
ship collision
raked bow
side plating
analytical calculation
numerical simulation
