航空航天返回过程的轻质能量吸收器  

Light energy absorber in aeronautic and astronautic recovery

作　　者：秦福德[1] 童明波[1] 何思渊[2] 张勇明[2] 何德坪[2] 

机构地区：[1]南京航空航天大学航空宇航学院,南京210016 [2]东南大学材料科学与工程学院,南京210096

出　　处：《东南大学学报（自然科学版）》2009年第4期790-794,共5页Journal of Southeast University：Natural Science Edition

基　　金：国家重点基础研究发展计划(973计划)资助项目(2006CB601201);南京航空航天大学博士学位论文创新与培优基金资助项目(BCXJ07-02)

摘　　要：采用精确控制的多种高孔隙率泡沫铝作为轻质能量吸收器,解决航空航天器返回地面及空降、空投着陆瞬间人员和装备的冲击过载问题.研究了轻质能量吸收器在航空航天返回和空降、空投应用中的阻尼减振和能量吸收性能.建立了带轻质能量吸收器的着陆系统与地面撞击的有限元模型,采用非线性动态仿真软件M SC.Dytran进行了仿真计算.在试验台上进行了试件的冲击试验,并将理论计算与试验结果进行了对比分析,两者基本吻合.结果表明:利用高孔隙率泡沫铝作为轻质能量吸收器可以一次降低返回载荷着陆动载超过30g,并可获得较长的塑性变形延时时间以平稳吸收返回载荷冲击能量,从而有效保护人员和设备的安全.To solve the problem of impact overloads on crew and equipments at the moment when aerospace recovery, airborne and airdrop land on the ground, this paper proposes that the A1 foams with precisely controlled high porosities can be used as the material of light energy absorber. Its vibration reduction and energy absorption performance in aerospace recovery or airborne and airdrop are discussed. The finite element model （FEM） of landing system with the light energy absorber impacting the ground was established and the nonlinear dynamic FEM code MSC. Dytran was adopted for simulation calculation. Meanwhile, the impact test was performed at the test platform. The results of the test and the simulation are basically identical. The high porosity A1 foam used as light energy absorber can reduce the overload over 30g at one time, and obtain longer delay time of plastic deformation to absorb impact energy of recovery mass smoothly. So it can protect crew and equipment effectively.

关 键 词：高孔隙率泡沫铝 航空航天 返回着陆 减振 能量吸收器 

分 类 号：V1[航空宇航科学与技术—人机与环境工程] O347[理学—固体力学]