航空装备缓冲气囊设计与缓冲特性研究OA

Aviation equipment cushioning airbag has become a research hotspot in aviation equipment cushioning systems due to their advantages such as small weight and low cost.To quickly solve the design problem of a certain type of buffer airbag,this paper uses numerical simulation software and takes the buffer airbag of a certain type of aviation equipment as the research object,a numerical simulation model of the annular buffer airbag was established based on the kinematics,engineering thermodynamics and flexible thin shell mechanics theories,and the steepest descent method was used to optimize the design of the model.By comparing the simulation results of the optimized parameters with the experimental results to verify the correctness of the model establishment,and analyze the impact of different parameters(opening area,opening pressure,and airbag height)on the buffering characteristics of the buffer airbag,the results show that when other parameters are constant,as the opening area increases,the buffering overload decreases and the landing speed increases with the increase of the opening area;the buffering overload increases and the landing speed decreases with the increase of the opening pressure;the buffering overload decreases,and the changes of landing speed are not significant with the increase of the airbag height.This simulation method can quickly determine the key design parameters(such as opening area,exhaust pressure,buffer height,etc.)and shape of the buffer airbag,which can improve the design efficiency of the cushion airbag,and provide a theoretical basis for studying the cushion characteristics of the airbag.