弹性飞机机动载荷分析与减缓技术综述

Flight loads are the foundation of aircraft structural design. However, it is a challenge to accurately and rapidly obtain maneuver loads in aircraft development. The elastic correction is performed based on rigid maneuver flight loads in early aircraft design. With the continuous increase in the flight speed and structural flexibility of modern aircraft, structural elastic deformation leads to significant changes in the distribution of maneuver loads, and it requires a comprehensive consideration of the coupling between aerodynamics and structure. Several analysis methods of maneuver loads are rapidly developed to satisfy different accuracy and efficiency. The load alleviation technology helps reduce the weight while satisfying the same requirements of the maneuver characteristics, stiffness and strength, becoming a hot topic in this field. This paper first summarizes the overall requirements and technical framework for the analysis and alleviation of maneuver flight loads in modern flexible aircraft. Then the analysis methods of flight loads, involving aerodynamics, structural strength/stiffness, data mapping, flight mechanics, etc., are introduced. The domestic and foreign technologies of maneuver load alleviation and simulation and experimental cases of maneuver flight loads analysis and alleviation are reviewed. Finally, the key issues of future maneuver flight loads analysis and alleviation technology development are discussed to provide reference for researchers in this field.