二阶波浪漂移力的回归分析

Regression Analysis of Second Order Wave Forces on Ships

二阶波浪载荷的预报对动力定位能力评估具有重要意义。对二阶波浪载荷的预报,通常可采用模型试验和数值模拟的方法。模型试验费用昂贵,数值模拟时面元划分的合理性对计算结果的影响很大,且模型试验和数值模拟周期都相对较长。采用压力直接积分法进行系列船型的二阶波浪漂移力计算,在此基础上,采用模长界限控制的正交化方法的多元多项式回归分析,给出二阶波浪漂移力的回归公式,并进行了验证分析。验证分析表明回归公式置信区间为0.95。

Prediction of second order wave forces on ships has important meaning to the evaluation of dynamic positioning capacity.Model test and numerical calculation can be used in the prediction of second order wave forces.Model test is expensive and the logic of surface element in numerical calculation has great influence on calculation result,while both of them have relatively long term work.This paper uses the direct pressure integration method to calculate second order wave forces of series ships.On the basis of the calculation,using multiple regression analysis based on orthogonal method,the regression equation of second order wave forces is got.Proof analysis shows that believable region of the regression equation is 0.95.