飞行器柔性起落架落震性能分析

Simulation Research of the Flexible Landing Gear’s Falling Vibration Performance on an Aircraft

以某型飞行器为原型,对该型飞行器进行了起落架缓冲器参数设计,并建立适用于ADAMS/Aircraft软件的起落架着陆性能仿真三维数字模型。进行了全刚性起落架全机落震仿真,验证起落架缓冲器初步设计结果基本满足落震缓冲性能要求。运用有限元软件对刚体起落架模型进行了柔性化处理,把起落架柔性因素考虑到缓冲性能分析中,建立简化数学模型对仿真结果加以分析验证。得出起落架柔性对缓冲器性能有一定影响的结论,并指出其影响的原因。对缓冲器参数设计具有指导意义。

By taking a certain type of aircraft as a prototype,it builds a three-dimensional digital simulation model.The model is based on ADAMS/Aircraft and focusing on the landing performance of landing gear.It carries falling vibration simulation of the rigid landing gear,and verifies that the designing results can meet the performance requirements of buffering the falling vibration.It also conducts flexible processing to the rigid landing gear by using finite element software.Furthermore,by taking flexibility into account in the analysis of cushioning performance of landing gear,it establishes a simplified mathematical model to verify the simulation results.It concludes that the flexible landing gear has an effect on the cushioning performance,and points out the effects of causes.It is of great guiding significance for the general parameter design of buffer.