An efficient and modular modeling for launch dynamics of tubed rockets on a moving launcher  

作　　者：Qin-bo Zhou Xiao-ting Rui Guo-ping Wang Jian-shu Zhang 

机构地区：[1]Institute of Launch Dynamics,Nanjing University of Science and Technology,Nanjing,Jiangsu Province,210094,PR China

出　　处：《Defence Technology（防务技术）》2021年第6期2011-2026,共16页Defence Technology

基　　金：The research is financially supported by the National Natural Science Foundation of China(No.11972193).

摘　　要：This paper develops a modular modeling and efficient formulation of launch dynamics with marching fire(LDMF)using a mixed formulation of the transfer matrix method for multibody systems(MSTMM)and Newton-Euler formulation.Taking a ground-borne multiple launch rocket systems(MLRS),the focus is on the launching subsystem comprising the rocket,flexible tube,and tube tail.The launching subsystem is treated as a coupled rigid-flexible multibody system,where the rocket and tube tail are treated as rigid bodies while the flexible tube as a beam with large motion.Firstly,the tube and tube tail can be elegantly handled by the MSTMM,a computationally efficient order-N formulation.Then,the equation of motion of the in-bore rocket with relative kinematics w.r.t.the tube using the Newton-Euler method is derived.Finally,the rocket,tube,and tube tail dynamics are coupled,yielding the equation of motion of the launching subsystem that can be regarded as a building block and further integrated with other subsystems.The deduced dynamics equation of the launching subsystem is not limited to ground-borne MLRS but also fits for tanks,self-propelled artilleries,and other air-borne and naval-borne weapons undergoing large motion.Numerical simulation results of LDMF are given and partially verified by the experiment.

关 键 词：Launch dynamics Marching fire Transfer matrix method for multibody systems Multiple launch rocket system 

分 类 号：V475.1[航空宇航科学与技术—飞行器设计]