两种不同形式前起落架缓冲与前轮转弯性能对比研究

缓冲与前轮转弯纠偏性能对起落架设计具有重要影响。采用ADAMS软件分别建立支柱式和摇臂式前起落架的飞机刚柔耦合动力学模型,并分别对前起落架的着陆缓冲和转弯纠偏过程进行动力学仿真及对比分析。结果表明:在同种着陆工况下,支柱式比摇臂式前起落架样机在前起落架航向所受合力更大,前轮接地后的俯仰角速度和机头下沉量相差不大;支柱式比摇臂式前起落架样机在更小的操纵力矩、转弯角度和侧向加速度下就会发生飞机侧滑。研究结果可为前起落架的设计和选取提供有益参考。

Contrastive Analysis of Buffering and Steering Performance for Two Different Types of Nose Landing Gear

Nose gear buffering and steering rectification have significant influence on landing gear design. Rigid-flexible coupling dynamic models for both articulated and post nose landing gears have been constructed respectively based on the same aircraft by in this paper. Contrastive analysis and dynamic simulations have been performed by applying previous models, traits of these two types of nose gear on landing buffering and steering performance have been deduced from the analysis. During the same landing case, tangential force is bigger for post nose gear, yet pitching angular velocity after touching ground and nose sinkage remain similar. Articulated nose gear is more likely to sideslip under smaller operating torque, steer angle and lateral acceleration compared with post nose gear. The results of this paper offer a meaningful share of reference materials for nose gear design and selections.