基于应变的柔性飞机刚弹耦合建模方法研究  

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

作　　者：杨建忠 卢勇 杨士斌 YANG Jianzhong;LU Yong;YANG Shibin(College of Airworthiness,CAUC,Tianjin,300300)

机构地区：[1]中国民航大学适航学院,天津300300

出　　处：《中国民航大学学报》2022年第2期36-41,共6页Journal of Civil Aviation University of China

基　　金：中央高校基本科研业务费专项(3122020081)

摘　　要：由于先进的民用运输类飞机结构重量占比越来越小,飞机表现出更高的柔性,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。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.

关 键 词：刚弹耦合 非线性梁 气动参数 飞行仿真 

分 类 号：V212.1[航空宇航科学与技术—航空宇航推进理论与工程]