Impact Performance Simulation And Configuration Optimization Of Satellite Debris Protection Structure

The space environment has deteriorating sharply,and the dangerous situation of satellite debris is becoming increasingly serious.The protective structure is an effective means to protect safe operation of orbiting aircraft.At present,with the development of China’s aerospace industry,research on HIV has gradually underway.However,research specifically on the impact resistance of protective structures is still in its infancy.The main content of this article is to carry out a series of researches on the material model parameters and configuration optimization of the hypervelocity impact process.Based on the idea of smooth particle hydrodynamics and AUTODYN-2D axisymmetric modeling method.A dynamic model of single-layer shield and multi-layered shield are established to simulate the projectile’s HIV process.First of all,Taking Shock equation of state and Johnson-Cook strength model as input conditions.The influence of the single-layer shield material’s constitutive model parameters on the impact simulation results were discussed.First,through the control variable method,the effects of the parameters of the same projectile material model on the velocity,energy,debris cloud damage characteristics are studied.The results show that there are insensitive parameters in the material model.Second,change the speed while ensuring that the kinetic energy of the impact is consistent.To study the effects of model parameters of different projectile materials on the energy,velocity,perforation and debris cloud damage characteristics of the projectile.It was found that when the speed is higher than 3 km/s,the influence of material model parameters is less obvious.Finally,the validity of the insensitive parameters of the material model is verified by comparing the ballistic limit curves of the Whipple shield.In addition,multi-layered protective structures obtain the optimal pattern of the configuration and spacing of the structural plies using numerical optimization.Then the accuracy of the numerical simulation results was verified by the HIV experiment.According to the simulation and experimental results,the specific steps of multi-layer structure configuration optimization are given,and the limit working conditions under fixed spacing are obtained.This work focuses on the impact resistance of the protective structure,combines numerical simulation methods and experimental techniques,and lays a solid application foundation for the optimal design of the protective structure,which has important engineering value.