扁平管膨胀性能仿真及实验研究  

Simulation and tests for expansion performance of a flat tube

作　　者：冯丽娜 李东[2] 田建东 孙璟 吴晗玲 陈荣 FENG Lina;LI Dong;TIAN Jiandong;SUN Jing;WU Hanling;CHEN Rong(Beijing Institute of Astronautical Systems Engineering,Beijing100076,China;China Academy of Launch Vehicle Technology, Beijing100076,China;College of Liberal Arts and of Sciences,National University of Defense Technology,Changsha410073,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 [3]国防科技大学文理学院,长沙410073

出　　处：《振动与冲击》2018年第23期149-156,共8页Journal of Vibration and Shock

基　　金：国家自然科学基金项目(11602030)

摘　　要：分离结构是航天运载器上十分关键的部位,膨胀管分离装置作为一种清洁的分离结构,被广泛应用于航天运载器的分离部位。使用LS-DYNA中的流固耦合算法对扁平管组件(扁平管、填充物、炸药索)进行了有限元仿真分析,并进行了实验验证,仿真与实验结果吻合较好。在此基础上,分别改变扁平管的壁厚,填充物的密度、弹性模量,通过有限元仿真分析了扁平管上两个特征点的膨胀速度、膨胀位移及扁平管动能的变化规律,获得各参数对于扁平管膨胀变形的影响,对于设计扁平管组件具有很大的指导意义。Separation structure is a key part of a space launch vehicle.The expanding tube separation device is widely used at the separating position of space launch vehicle.as a clean separation structure.Here,the finite element simulation analyses were performed for a flat tube assembly including flat tube,filler and explosive rope using the fluid-solid coupled algorithm in the software LS-DYNA and test verifications were conducted.The simulation results agreed well with those of tests.Furthermore,changing wall thickness of the flat tube,mass density and elastic modulus of filler,respectively,the variation laws of expanding velocity and expanding displacement of two feature points on the flat tube and the tube’s kinetic energy were analyzed through the finite element simulation to obtain the effects of these parameters on the flat tube’s deformation.The results provided a guide for the design of flat tube assemblies.

关 键 词：扁平管 膨胀速度 膨胀位移 填充物 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]