搁浅台型礁石场的船舶双层底肋板骨材变形机理研究

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振动与冲击 ›› 2014, Vol. 33 ›› Issue (14) : 188-194.

论文

搁浅台型礁石场的船舶双层底肋板骨材变形机理研究

于兆龙1，胡志强1,2，刘毅1，王革3

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Collapse mechanism analysis of stiffeners on transverse floors in a shoal grounding course of a double bottom tanker

YU Zhao-long 1, HU Zhi-qiang 1, 2, LIU Yi 1, WANG Ge 3

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文章历史 +

摘要

以典型船舶双层底结构中肋板骨材为研究对象，用塑性力学理论及数值仿真讨论肋板骨材在船舶搁浅台型礁石场时的变形过程与破坏机理。用LS_DYNA仿真技术模拟获得结构变形模式及能量耗散结果。在研究变形模式基础上建立肋板骨材塑性变形数学模型。用上限定理及MATLAB编程数值方法求解纵桁骨材变形吸收的结构变形能及平均变形阻力；用数值仿真结果进行验证。研究获得纵桁骨材变形阻力及变形能解析计算公式，对船舶双层底耐撞性结构设计及性能评估具有一定指导意义。

Abstract

Plastic theory and numerical simulations are used to discuss the deformation patterns and the collapse mechanism of stiffeners on the transverse floors in a shoal grounding scenario of a double bottom tanker. In the study, numerical simulation code LS_DYNA is used to calculatethe deformation patterns and energy dissipation, and a mathematical model of the deformed stiffener is built. Using the upper bound theory, a MATLAB program is developed to solve the governing equations and to obtain the distortion energy and mean grounding resistances. The results are verified against the numerical results at last. The proposed theoretical model could be a reference toassessments ofship crashworthiness during its design phase.

导出引用

于兆龙;胡志强;刘毅;王革. 搁浅台型礁石场的船舶双层底肋板骨材变形机理研究[J]. 振动与冲击, 2014, 33(14): 188-194

YU Zhao-long;HU Zhi-qiang;;LIU Yi;WANG Ge . Collapse mechanism analysis of stiffeners on transverse floors in a shoal grounding course of a double bottom tanker[J]. Journal of Vibration and Shock, 2014, 33(14): 188-194