基于模型试验的船-冰碰撞载荷空间分布演变历程研究

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振动与冲击 ›› 2021, Vol. 40 ›› Issue (5) : 16-23.

论文

孙剑桥1,2，黄焱1,3

作者信息 +

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

SUN Jianqiao1,2, HUANG Yan1,3

Author information +

文章历史 +

摘要

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“峰-谷”循环波动特征相对应的“单-双”高压力区周期性的动态演变过程，极端冰载荷只存在于“单高压力区”型的局部空间分布形态下。基于多个载荷板对船-冰接触轨迹进行覆盖的理念，提出一种移动冰载荷的构建方法。相邻载荷板之间的载荷时程存在重叠以更好地模拟载荷的空间“移动”，而各载荷板上的非均布冰压力则通过高斯函数进行拟合。

Abstract

A series of model-scale ship-ice glancing impact tests was conducted in ice tank to investigate the global spatial migration and local spatial distribution of ship-ice impact loads. According to the test results, the ice loading trail on the ship hull during ship-ice impact was found to be parabolic, and there was a dynamic “single to double” high-pressure zone transformation during a “peak to trough” cycle in the load fluctuations. Larger ice loads were found existed only under “single high-pressure zone” pattern. Based on the concept of using several load patches to cover the ice loading trail, an approach to generalized migrating ice load was proposed. The load histories on adjacent patches were set to be overlapped to achieve a better simulation on the load migration, and the non-uniform ice pressures on each patch were fitted with Gaussian function.

导出引用

孙剑桥1,2，黄焱1,3. 基于模型试验的船-冰碰撞载荷空间分布演变历程研究[J]. 振动与冲击, 2021, 40(5): 16-23

SUN Jianqiao1,2, HUANG Yan1,3. Evolution of spatial distribution of ship-ice collision load based on model tests[J]. Journal of Vibration and Shock, 2021, 40(5): 16-23

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