中国新型极地考察船冰载荷预估研究

本文针对中国新型极地考察船所受冰载荷进行了研究,其中包含了平整冰阻力和浮冰碰撞力.对于船舶设计者和建造者来说,船舶冰载荷的预估非常重要.本文采用经验公式方法计算了该船在平整冰中航行的冰阻力,并且与模型试验结果进行了对比.结果显示,计算和试验结果中的冰阻力都随船舶航行速度的增大而增大,经验公式方法可以预测出合理的平整冰阻力.通过计算得到了该船的性能曲线,即该船在不同厚度平整冰中航行所能达到的速度.此外,本文还考虑了该船与圆形浮冰之间的三维斜向碰撞问题,采用解析方法评估了浮冰对船舶的撞击力,研究了撞击位置、法向框架角度以及浮冰尺寸对碰撞力的影响.基于计算结果,本文就冰载荷的预测进行了讨论并提出了一些建议.

Estimation of Ice Load for the New Chinese Polar Research Vessel

This paper is aimed to investigate ice load for a new Chinese polar research vessel, includ?ing level ice resistance and ice floe impact force. Estimation of ice load is most important for both ship designers and shipbuilders. Empirical methods are applied to calculate level ice resistance for the ves?sel. Ice model tests of the vessel are conducted, and the test data are compared with the empirical re?sults. It is found that both calculated and experimental level ice resistances increase with ship speed and that the empirical method can make a reasonable prediction of level ice resistance. The vessel per?formance curve, i.e. the speed the vessel may attain in different level ice thicknesses, is also present?ed. In addition, the 3D oblique-type collision between the vessel and a circular-shaped ice floe is con?sidered. An analytical method is applied to estimate ice floe impact forces for the vessel. The effects of the impact location, the normal frame angel and the ice floe size on the impact forces are also studied. Some discussions and suggestions are presented.