极地冰区运输船冰激振动及抗振结构研究

Research on ice induced vibration and anti-vibration structure of transport ship in polar ice region

本文使用有限元软件Ls-dyna,建立有限元船体模型和冰体模型,模拟冰区运输船在层冰区进行破冰航行的过程,计算出船体船肩局部结构冰激振动响应。随后为抗冰激振动,在船体船肩使用了I型、V型、X型和四边蜂窝型4种夹层板结构进行局部结构加强。分别计算出由4种夹层板结构强化后船体局部结构的振动加速度时程曲线,处理数据后,进行数据对比,计算出3个方向上的减幅,并分析对比这4种夹层板结构在3个方向上的减振减幅效果,为极地冰区运输船的抗冰激振动局部结构强化提供量化的减振参数,再结合经济性选出最合适的抗冰激振动减振方案。

This paper used the finite element software Ls-dyna to build the finite element model of ice body and hull,to simulate the process of ice-breaking navigation of the ice transport ship in the ice zone,and to calculate the ice-induced vibration response of the local structure of hull shoulder.Then,in order to resist ice induced vibration,four sandwich structures,I type,V type,X type and four honeycomb type,are used to reinforce the hull.Respectively calculated by four kinds of sandwich plate structure strengthened after the local structure of hull vibration acceleration time history curve,after processing the data,compared with the data of the first quarter,calculate the damping on the three directions,and analyzed the four kinds of sandwich plate structure in three directions of vibration damping effect,as the polar ice carrier of ice induced vibration damping parameters of local structure reinforcement provides a quantitative,combined with economy,the most appropriate anti-ice-induced vibration reduction scheme is selected.