基于模型试验的船-冰碰撞载荷空间分布演变历程研究

针对船-冰碰撞载荷空间分布的演变历程,通过一系列的冰水池模型试验,分别从整体与局部的角度,对船-冰碰撞载荷沿船体表面的空间移动轨迹,及局部冰压力空间分布形态随时间的变化过程进行了研究.结果表明:船-冰碰撞过程中的冰载荷沿船体外板的整体作用呈现出近抛物线的轨迹;同时,冰压力的局部空间分布也呈现出与冰载荷时程曲线中...

Evolution of spatial distribution of ship-ice collision load based on model tests

Aiming at evolution process of ship-ice collision load spatial distribution,based on a series of ice water pool model tests,the spatial movement trajectory of ship-ice collision load along hull surface and the change process of local ice pressure spatial distribution with time were studied from theglobalandlocalperspectives.The results showed that the ice load along the whole hull outer plate presents a parabola trajectory in process of ship-ice collision;at the same time,the local spatial distribution of ice pressure also presents a periodic dynamic evolution process ofsingle-doublehigh pressure zone corresponding to thepeak-valleycyclic fluctuation characteristics in the ice load time history curve,and the extreme ice load only exists under local spatial distribution morphology ofsingle high pressure zonetype;based on the concept of multi-load plate covering ship-ice contact trajectory,a method of constructing moving ice load is proposed;load time histories between adjacent load plates overlap to better simulate the spatialmovementof load,while the non-uniform ice pressure on each load plate is fitted with Gaussian function.