起落架前后柔度对民用飞机着陆载荷的影响研究  

Research on the influence of front and rear flexibility of landing gear on the landing load of civil aircraft

作　　者：马光远 Ma Guangyuan(Shanghai Aircraft Design and Research Institute,Shanghai,201210,China)

机构地区：[1]上海飞机设计研究院,上海201210

出　　处：《机械设计与制造工程》2024年第11期71-74,共4页Machine Design and Manufacturing Engineering

摘　　要：研究了民用飞机着陆起落架载荷计算模型,建立了全机结构动力学模型,选取不同的起落架前后柔度进行着陆载荷分析,研究机身不同位置的着陆载荷响应。结果表明,不同的起落架前后柔度引起着陆起落架载荷频率差异,飞机着陆起落架载荷频率可能与机身或垂尾弯曲模态耦合,导致飞机着陆载荷显著增大。此外,相同的起落架前后柔度对前后机身着陆载荷影响不同,因此起落架结构设计需要综合考虑全机着陆载荷响应。A load calculation model for landing gear of civil aircraft is studied,and a dynamic model of the entire aircraft structure is established.Different front and rear flexibility landing gears are selected for landing load analysis,and the landing load response at different positions of the fuselage is studied.The results indicate that different flexibility of the landing gear causes differences in the frequency of landing gear loads,and the frequency of aircraft landing gear loads may be coupled with the bending mode of the fuselage or vertical tail,which results in a significant increase in aircraft landing loads.In addition,the same flexibility of the landing gear has different effects on the landing load of the front and rear fuselage,so the structural design of the landing gear needs to comprehensively consider the landing load response of the entire aircraft.

关 键 词：起落架 前后柔度 着陆载荷 模态 

分 类 号：V226[航空宇航科学与技术—飞行器设计]