基于变形圆筒实验的扁平管组件能量输出效率研究  

Energy output efficiency of flat tube assembly based on deformable cylinder experiment

作　　者：冯丽娜 李东[2] 田建东 曲展龙 孙璟 FENG Lina;LI Dong;TIAN Jiandong;QU Zhanlong;SUN Jing(Beijing Institute of Astronautical Systems Engineering,Beijing 100076,China;China Academy of Launch Vehicle Technology,Beijing 100076,China)

机构地区：[1]北京宇航系统工程研究所,北京100076 [2]中国运载火箭技术研究院,北京100076

出　　处：《振动与冲击》2020年第23期176-181,共6页Journal of Vibration and Shock

基　　金：国家自然科学基金(11602030)。

摘　　要：膨胀管分离装置是航天运载器上一种常用的线式分离装置,其能量源为扁平管组件(炸药索、填充物和扁平管)。为研究扁平管组件的能量输出效率,通过实验的方法,将扁平管组件插入1060纯铝筒中,测量铝筒外壁特征点的速度和位移变化历程,并将实验后的实验件进行线切割,测量其内径的变化。对上述实验过程进行有限元仿真分析,仿真结果与实验结果对应得较好。通过仿真分析结果获得铝筒的塑性变形能,作为扁平管组件输出的有效能量,其占炸药总能量的比值为能量输出效率,得到扁平管组件的能量输出效率约为22.8%。在有限元分析中改变填充物的材料参数,发现在一定参数范围内,扁平管组件的能量输出效率随填充物的密度、弹性模量和泊松比的增加而增加。The expanding tube separation device is a commonly used linear separation device on space launch vehicle,whose energy source is a flat tube assembly including explosive cord,filler and a flat tube.Here,to study the energy output efficiency of the flat tube assembly,firstly it was inserted into a 1060 pure aluminum cylinder with the experiment method.Then velocity and displacement time histories of characteristic points on outer wall of the aluminum cylinder were measured.Wire cutting was done for specimens after experiment to measure their inner diameter’s variation.The above experimental process was simulated with the finite element method.The simulation results agreed well with experimental ones.The plastic strain energy of the aluminum tube was obtained by the finite element simulation,and taken as the effective energy output by the flat tube assembly,and its ratio to the total energy of explosive was the energy output efficiency of the flat tube assembly.Results showed that the energy output efficiency of the flat tube assembly is about 22.8%;within a certain filler’s material parameter range,the energy output efficiency of flat tube assembly increases with increase in filler’s density,modulus and Poisson’s ratio.

关 键 词：扁平管组件 变形圆筒实验 塑性变形能 能量输出效率 有限元分析 

分 类 号：V421.7[航空宇航科学与技术—飞行器设计] TP391.9[自动化与计算机技术—计算机应用技术]