一种能考虑动升力影响的高速艇迎浪纵向运动的数学模型

Mathematical model on longitudinal motion of high speed craft in heading sea considering effect of hydrodynamic lift

根据高速艇在静水及波浪中运动的特点,提出了高速艇迎浪纵向运动的基本假设,建立了能考虑动升力影响的高速艇迎浪纵向运动基本方程,并提出了高速艇迎浪纵向运动预报的一种新方法(滑航法),编制了理论预报程序,进行了模型试验验证研究.结果表明,中高航速时,滑航法可用于高速艇迎浪纵向运动的预报.

According to the characteristics of motion of high speed craft in still water and waves, the fundamental hypotheses of longitudinal motion of the high speed craft in heading sea are presented; the longitudinal motion equation of the planning craft in heading sea is established, which includes the effects of the hydrodynamic lift and the hydrodynamic moment of the planning craft; a new theoretical method on longitudinal motion of the high speed craft in waves, i.e. planning method, is presented; and the theoretical prediction program is set up. The model experiments in waves are carried out. The calculated values of heave, pitch in different speeds, are compared with experimental values. The result shows that the planning method is suitable for the prediction of longitudinal motion of high speed craft in heading sea at the middle or high speed.