考虑俯仰时鸭式布局飞机突风载荷系数计算

采用离散突风模型，通过解飞机运动微分方程，分析计算了飞机在考虑纵向转动时的突风过载系数，与ＮＡＣＡＲ１２０６的计算模型相比，本文的模型考虑了因俯仰而产生的升为增量和因俯仰使飞机迎角变化而产生的升力增量，并以ＡＤ２００双座鸭式布局轻型飞机为例，分析和计算了飞机俯仰对突风过载系数的影响。尽管轻型飞机穿过一个突风的时间相对较长，但对具有静稳定性的飞机，特别是对于通常具有前翼先失速特点的鸭式布局飞机．飞机的俯仰对飞机的最大过载影响不大。ＡＤ２００飞机突风过载计算结果表明：飞机的纵向转动对鸭式布局飞机的突风过载系数的影响很小，可忽略不计，即ＮＡＣＡＲ１２０６给出的突风载荷系数计算公式对鸭式布局轻型飞机是足够精确的。

Gust Load Calculation of Canard Airplanes with Pitching

Gust load of airplanes,especially of canard airplanes, is analysed and calculated when the airplane pitch is taken into account.The differential equations of the airplane motion in a gust are deduced based on the assumptions that the airplane can pitch with the life increment of the horizontal tail considered. The life increment caused by the airplane pitching is considered. These are different from the assumptions of NACA R1206.It is found that for static stability airplanes especially for canard airplanes which usually have the first stalling characteristics of the canard surface,the airplane pitching causes a little effect on the maximum gust load factor,although the airplane takes rather more time for penetrating a gust wave. The two-seat canard airplane AD200 is taken as an example. The result shows that the airplane pitching in a gust has a negligible effect on the gust-load for light canard airplanes.