机体弹性对某型民机起落架着陆载荷影响分析  

Effects analysis of airframe flexibility on airliner landing impact loads

作　　者：徐尧 周文博[1] Xu Yao;Zhou Wenbo(Shanghai Aircraft Design and Research Institute, Shanghai, 200232, China)

机构地区：[1]上海飞机设计研究院,上海200232

出　　处：《机械设计与制造工程》2020年第12期73-76,共4页Machine Design and Manufacturing Engineering

摘　　要：研究了多柔体动力学计算原理并给出了运动方程,建立了起落架多体动力学与弹性机体一体化的多柔体全机模型,分析了弹性机体条件下起落架着陆响应载荷,对比弹性机体起落架响应载荷与刚性机体起落架响应载荷,研究了机体主要弹性模态对着陆响应载荷的影响,表明机身垂向一阶弯曲模态对起落架着陆载荷影响最为显著。The theory of flexible multibody analysis is presented and the flexible multibody equations of motion is derived.The integrated model including multibody landing gear and flexible airframe is built.The landing simulation is realized with the integrated model,and the landing gear loads with consider the airframe flexibility is calculated.The deviation of landing loads is shown between the simulation with flexible airframe and simulation with rigid airframe.The effects of each flexible mode of airframe to landing loads is been studied,shows that the first fuselage bending mode effect the landing gear loads most.

关 键 词：机体弹性 模态 起落架 ADAMS 着陆载荷 

分 类 号：V226[航空宇航科学与技术—飞行器设计]