基于降落区概念的飞机起落架着陆动力学分析  

Analysis of Landing Impact Force of Aircraft Landing Gears Based on the Conception of Landing Aera

作　　者：魏小辉[1] 聂宏[1] 

机构地区：[1]南京航空航天大学102教研室,江苏南京210016

出　　处：《航空学报》2005年第1期8-12,共5页Acta Aeronautica et Astronautica Sinica

基　　金：国家自然科学基金(10072025);航空基础科学基金(00B52028);教育部优秀青年教师资助计划(1825)资助项目

摘　　要：在飞机跑道上引入降落区的概念,建立了飞机在该降落区上降落时的简化分析模型;推导出了基于该分析模型的运动微分方程及相关参数的表达式,采用数值分析方法解出飞机分别以正常着陆速度2 70m/s和非正常着陆速度3 545m/s垂直撞击地面这一过程的动态响应,给出机身载荷-时间历程曲线和地面垂支反力-时间历程曲线等。与原模型分析结果相比,正常着陆时机身受载和地面垂支反力最大值减小45%,非正常着陆时机身受载和地面垂直反力最大值减小49%,有效减小了冲击载荷。The new conception of landing area is introduced, and a simplified model of the conventional oleopneumatic landing gear during the process of landing impact on the landing area is established. The mathematic model is also derived. The dynamic responses of the landing gear landing vertically with initial velocities of 2.70m/s and 3. 545m/s are calculated respectively via Runge-Kutta procedure. Simulation results for both original model and this new model are presented to illustrate the effectiveness of this new model. The result shows that, in the two cases, the maximum of the impact loads on airframe is reduced 45% and 49% respectively.

关 键 词：振动与波 降落区 数学模型 起落架 飞机跑道 

分 类 号：V214.13[航空宇航科学与技术—航空宇航推进理论与工程]