Research On The Kinematics Model And Numerical Simulation Of Flying Net Projectile's Flight Attitude

Ultra-short range active interception technology is a new concept which is developed according to the characteristics of modern war weapon system.Compared with point-to-point hard interception and fragmentation cloud killing interception with millisecond time window,the interception time window of Flying-Web-Projectile can be up to a few seconds,which is beneficial to the engineering application of ultra-short range active interception system.In this thesis,the kinematics model of rope-web is systematically studied,and a simplified ballistic kinematics model suitable for describing the flight process of Flying-Web-Projectile is established,which provides basic support for system simulation and interception efficiency evaluation of Flying-Web-Projectile interception system.Firstly,the motion simulation model of a single rope in a two-dimensional plane is studied,and the classical "Semi-Linear Spring Dampers" model is introduced in detail.On this basis,a new improved simplified model,"Particle Semi-Rigid-Body" model,is proposed by using the method of momentum exchange.Then,the simulation calculation of the two models was carried out through the free fall experiment of the single-ended fixed rope.The simulation results of the two groups of simulations on the experimental results were analyzed and compared,and the reliability of the new model was verified.According to the experimental results,the simulation model is modified to consider the air resistance.On this basis,the motion simulation model of the Flying-Web-Projectile was established in three dimensional space,and the simulation calculation was carried out in three groups of working conditions.According to the needs of performance evaluation of Flying-Web-Projectile,the performance evaluation indexes are put forward.The simulation results are compared with the experimental results of simulated FlyingWeb-Projectile launch,which further verifies the reliability of the model.Compared with the actual launch experiments,it is shown that the simplified kinematics simulation model proposed in this thesis has a good simulation effect on the web pattern change process of the whole system,and can be used for the system simulation modeling and the evaluation of interception efficiency of the whole system.