必赢nn699net

必赢nn699net学报 ?? 2022, Vol. 40 ?? Issue (2): 36-41.

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必赢nn699net: 基于应变的柔性飞机刚弹耦合建模方法研究

杨建忠,卢 勇,杨士斌    

  1. (必赢nn699net适航学院,天津 300300) 
  • 收稿日期:2021-03-17 修回日期:2021-03-17 接受日期:2021-01-22 出版日期:2022-06-05 发布日期:2022-06-05
  • 作者简介:杨建忠(1974—),男,宁夏固原人,教授,硕士,研究方向为航空器适航审定技术.
  • 基金资助:
    中央高校基本科研业务费专项(3122020081)

必赢nn699net: Approach of strain based rigid-elastic coupling modeling for flexible aircraft 

YANG Jianzhong, LU Yong, YANG Shibin    

  1. (College of Airworthiness, CAUC, Tianjin, 300300) 
  • Received:2021-03-17 Revised:2021-03-17 Accepted:2021-01-22 Online:2022-06-05 Published:2022-06-05

摘要: 由于先进的民用运输类飞机结构重量占比越来越。苫硐殖龈叩娜嵝,采用传统刚体模型假设研究 飞机的飞行控制将会产生较大的误差。 考虑机翼的大变形运动,采用基于应变的非线性梁模型建立结构动 力学与传统刚体飞行动力学耦合模型,利用等效方法获得与刚体模型等效的刚弹耦合飞机气动参数,通过 仿真对比了传统刚体模型和刚弹耦合模型在飞机副翼上的响应和垂直阵风响应上的差异。 结果表明:副翼 偏转时刚弹耦合模型副翼舵效率比刚体模型低 18.77%,在垂直阵风的作用下基于刚弹耦合模型预测的翼 根弯矩比传统刚体模型低 8.35%,机翼的弹性运动也会对刚体运动产生一定影响。

关键词: 刚弹耦合, 非线性梁, 气动参数, 飞行仿真 

Abstract: As the proportion of structural weight of advanced civil transport aircraft gets smaller and smaller, the aircraft shows higher flexibility, traditional rigid model assumption may lead to large errors in the study of aircraft flight control. Considering the large deformation movement of the wing, strain based nonlinear beam model is used to establish a coupling model of structural dynamics and traditional rigid flight dynamics. The aerodynamic parameters of the rigid-elastic coupling aircraft equivalent to the rigid model are obtained by the equivalent method, and the differences between the traditional rigid model and the rigid-elastic coupling model on aileron and vertical gust response are compared through simulation. The results show that the elasticity of the wing will reduce the aileron efficiency by 18.77% during the roll maneuver. Under the action of vertical gust, the wing root bending moment predicted by the rigid-elastic coupling model is 8.35% lower than that by rigid model, and elastic motion of the wing also has an impact on rigid motion.

Key words: rigid-elastic coupling, nonlinear beam, aerodynamic parameters, flight simulation

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