运动突风中的飞机动响应建模及仿真

Dynamic response modeling and simulation of aircraft in the travelling gust

与传统突风相比,运动突风具有传播速度高、扰动能量强的特点,是一种特殊的突风。当飞机遭遇运动突风时,飞机受到的气动力变化复杂,飞机的动响应呈现出一些特别的现象。基于运动突风的特点,采用时间推进方法,提出了运动突风环境中的飞机准定常气动力计算技术,给出了运动突风作用下的飞机动响应求解方法与流程,最后开展了仿真验证。仿真结果表明:所提出的方法可以满足飞机在运动突风中的动响应求解需要;结果规律良好、量级合理,能够反映飞机在运动突风中的运动动态特性。

Compared with the traditional gust,the travelling gust is a special gust,which often propagates at a higher speed and contains stronger disturbing energy.The dynamic response of the aircraft encountering the travelling gust will demonstrate some particular phenomena due to the complex air loads,and the aerodynamic changes of the aircraft are complex.Based on the characteristics of the travelling gust,the quasi-steady aerodynamics modeling technique of the aircraft in the travelling gust was proposed by employing the time axis of the travelling gust as the time advancement.The dynamic simulation method and process of the aircraft in the travelling gust were presented.Finally,the simulation verification was carried out.The simulation results show that the proposed approach can satisfy the dynamic response solving requirement of the aircraft in the travelling gust.The results illustrate a good change trend and reasonable magnitude,which could represent the dynamic characteristics of the aircraft in the travelling gust.