船舶运动和加速度计算公式在集装箱船疲劳强度评估中的适用性研究

Study on the Formulas of Motion and Acceleration in the Fatigue Strength Assessment of Container Ships

围绕国际船级社协会波浪载荷会议(AHG_WD-SL)制定的船舶重心处运动和加速度公式能否适用于集装箱船疲劳强度评估这一关键问题开展研究。通过对15艘集装箱船实船的水动力数值解和AHG_WD-SL公式计算的比较表明,AHG_WD-SL公式除横摇角和横摇加速度之外都与数值计算结果相差较大,不能用于集装箱船的疲劳强度评估。在此基础上,对不适用的公式进行了修正,得到了与数值解吻合度较好的新公式。论文提出的公式实用,研究结果可应用于集装箱船疲劳强度评估,对于提高集装箱船的结构设计水平具有一定指导意义。

Whether the AHG_WD-SL formulas of motion and acceleration of ship’s gravity center can be applied to container ship’s fatigue evaluation is studied.By comparison of the hydrodynamic numerical results of 15container ships and the AHG_WD-SL formula,it show that the AHG_WD-SL formula varies greatly from the numerical calculation results except for the roll angle and roll acceleration,and can not be used for the fatigue strength evaluation of container ships.Based on this,the inapplicable formulas are modified to obtain new formulas with good agreement with the numerical results.The formulas determined in this paper are practical,and the research results can be used for container ships’fatigue strength evaluation,which has some guiding significance for improving the structural design level of container ships.