小车式起落架地面载荷与漂浮性分析  

Ground load and float-ability analysis of trolley type landing gear

作　　者：杨钰 张明[1,2] 阮爽 史夏正 YANG Yu;ZHANG Ming;RUAN Shuang;SHI Xiazheng(State Key Laboratory of Mechanics and Control for Aerospace Structures,Nanjing University of Aeronautics and Astronautics,Nanjing 210016,China;Key Laboratory of Fundamental Science for National Defense-Advanced Design Technology of Flight Vehicle,Nanjing University of Aeronautics and Astronautics,Nanjing 210016,China)

机构地区：[1]南京航空航天大学航空航天结构力学及控制全国重点实验室,南京210016 [2]南京航空航天大学飞行器先进设计技术国防重点学科实验室,南京210016

出　　处：《航空工程进展》2024年第4期82-92,共11页Advances in Aeronautical Science and Engineering

基　　金：航空科学基金(2022Z029052001);中央高校基本科研业务费专项资金资助项目(56XBC22026)。

摘　　要：飞机起落架与道面的相容性对飞机的地面运动能力具有重要影响。针对某大型飞机计算不同工况下其起落架载荷及轮胎载荷分配,采用基于韦斯特加德层板理论的波特兰水泥协会法和基于加利福尼亚承载比的美国陆军工程兵团方法,计算不同着陆工况、地面机动工况、轮胎数量、轮胎泄气工况、轮胎间距对飞机等级数的影响,分析刚性道面和柔性道面下的飞机漂浮性。结果表明:垂直过载和机轮泄气带来的轮胎载荷增大与载荷分配不均,都会在不同程度上减弱飞机的漂浮性,尤其是转弯和机尾下沉着陆工况需要予以限制;轮胎数量和轮胎间距的增加可以改善漂浮性,需同时考虑结构设计、强度裕度等来优化设计小车式起落架构造。The compatibility of aircraft landing gear and pavement is of great significance to the ground motion ability of aircraft.In this paper,the landing gear load and tire load distribution under different working conditions for a large aircraft are calculated by using the Portland Cement Association method based on Westgard laminate theory and the United States Army Corps of Engineers method based on California bearing ratio(CBR).The influence of the landing conditions,ground mobility,tire number,tire deflation and track widths on the aircraft classification number(ACN) is analyzed.The aircraft float-ability under rigid and flexible pavement is analyzed.Results show that the increased tire load and uneven load distribution caused by vertical overload and tire deflation can weaken the float-ability of aircraft to varying degrees,especially during turning and landing conditions with tail sinking,therefore,which need to be limited.Increasing the number of tires and the distance between them can improve the floatability,but the structural design,strength margin and other factors should also be taken into consideration to optimize the design of trolley type landing gear.

关 键 词：地面载荷 漂浮性 起落架 道面 加利福尼亚承载比 飞机等级数 

分 类 号：V226[航空宇航科学与技术—飞行器设计]