基于半经验公式方法的破冰船破冰阻力计算

Calculation of Ice Resistance for Icebreaker Based on Semi-empirical Formula Method

传统Lindqvist半经验公式存在将不同船型阻力的计算结果均一化的缺点,文章基于船首不同区域的海冰破坏模式,采用船体纵向切片法对传统Lindqvist半经验公式进行了改进。通过将传统及改进后的半经验公式计算结果与模型试验结果进行比较,验证了改进的Lindqvist半经验公式计算结果的有效性和正确性。进而通过半经验公式计算方法,研究船速和船舶吃水对船体所受破冰阻力的影响。结果表明,改进的Lindqvist半经验公式计算结果明显高于传统Lindqvist半经验公式,与试验值更为接近;船舶破冰阻力随船速呈近似线性增长的趋势,随船舶吃水的增加呈现减小的趋势。

The traditional Lindqvist semi-empirical formula has the disadvantage of homogenizing the calculation results of the ice resistance for different types of ship.Based on the sea ice failure modes in different areas of the bow,the traditional Lindqvist semi-empirical formula is refined by the longitudinal slice method of the hull.The validity and correctness of the refined Lindqvist semi-empirical formula are verified by comparing the results of traditional and refined semi-empirical formula with those of model tests.Furthermore,the effects of ship speed and ship draft on the ice resistance of ship are studied by semi-empirical formula calculation method.The results show that the calculated results of the refined Lindqvist semi-empirical formula are significantly higher than those of the traditional Lindqvist semi-empirical formula,and are closer to the experimental values.The ship’s ice resistance increases approximately linearly with the ship speed and decreases with the increase of the ship draught.