水上飞机单船身试验的水动力回归分析

摘要

For establishing hydrodynamic mathematical model of seaplane taking off .Take the method of variable substitution,and transform multivariate polynomial regression formulas to multivariate linear re -gression formulas .Fixed navigate state tests of seaplane single hull are conducted .Stepwise regression a-nalysis of test results ,hydrodynamic resistance and hydrodynamic lift ,are founded .regression analysis for-mula is trinary polynomail about model velocity ,stepped draft and trim angle ,and regression forecast re-gion at 95%confidence level is estimated .the result shows that forecast region covers very well measured value,calculating precision of regression formulas is high .%为了建立水上飞机起飞过程水动力数学模型。采用变量替换的方法，将三元多项式回归公式转换为多元线性回归表达式，通过对水上飞机单船身固定航态试验的水动阻力、水动升力关于模型速度、断级吃水、纵倾角的逐步回归分析，建立了水动力三元多项式回归分析模型，估算了95％置信水平的多元回归预测区间，结果表明区间预测很好地涵盖了实测结果，回归公式计算精度比较高。