不同地面条件重装空投气囊着陆缓冲过程数值分析  

Numerical Analyses of Heavy Equipment Airdrop with Cushion Airbag Landing Process Impacting the Rigid and Soil Ground

作　　者：连伟欣 侯斌 孙建红[1,2] 王从磊[2,3] 张彤 LIAN Weixin;HOU Bin;SUN Jianhong;WANG Conglei;ZHANG Tong(Key Laboratory of Aircraft Environment Control and Life Support Ministry of Industry and Information Technology,Nanjing University of Aeronautics and Astronautics,Nanjing 210016,China;Hongguang Airdrop United Technology Center,Nanjing University of Aeronautics and Astronautics,Nanjing 210016,China;AVIC Hongguang Airborne Equipment Company,Nanjing 210022,China)

机构地区：[1]南京航空航天大学飞行器环境控制与生命保障工业和信息化部实验室,南京210016 [2]南京航空航天大学宏光空降空投联合技术中心,南京210016 [3]航空工业宏光空降装备有限公司,南京210022

出　　处：《航空工程进展》2022年第1期68-75,共8页Advances in Aeronautical Science and Engineering

基　　金：江苏高校优势学科建设工程资助项目。

摘　　要：刚性地面假设的重型装备空投的数值结果无法准确模拟空投的着陆姿态,需使用土壤地面对空投的缓冲性能进行研究。使用LS-DYNA有限元仿真软件对土壤地面和刚性地面下空投的着陆缓冲性能进行对比,研究刚性地面的适用条件;并研究土壤地面下不同横向风速对空投着陆缓冲性能的影响。结果表明:空投竖直冲击地面时,两种地面下货物的最大过载差异很小,而在横风条件下前倾冲击时过载差异很大,故在横风条件下需采用土壤地面进行数值分析;土壤地面下横向风速、初始竖向速度越大,竖向峰值过载越大。The numerical results of heavy equipment airdrop based on rigid ground assumption cannot accurately simulate the landing attitude of airdrop,so it is necessary to study the cushioning performance of airdrop under soil ground.In order to study the suitable condition of rigid ground,the LS-SDYNA software is used to simulate the landing process,and to compare the performance of the airdrop system under the rigid and soil ground.Meanwhile,the effect of different lateral wind velocities on the airdrop impact performance is analyzed.The results show that the difference of the maximum overload of the cargo is very small between the case of the rigid and the soil ground when the airdrop system only strikes the ground perpendicularly.The difference is much greater and the deformation effect of soil ground is significant under lateral wind conditions.Therefore,soil ground should be used for simulation with lateral wind.Under soil ground the larger of the lateral wind velocity and the initial vertical velocity,the larger of the vertical peak overload.

关 键 词：空投系统 土壤模型 缓冲气囊 有限元 土壤变形 

分 类 号：V244.[航空宇航科学与技术—飞行器设计]