Design And Simulation For Special Bionic Space Net Structures

Space debris removal has been an issue that needs to be addressed as a matter of urgency in the international space field.Nowadays,a variety of means have been put forward,including manipulators,flying claws,space net and so on.Space net,characterized by good fault tolerance and long capture distance,has distinct advantages in space debris disposal,making it popular in active debris removal in recent ten years.The structure,hole and mass of the net are all influencing factors of the capture task,including the capture distance,range and velocity.Therefore,we take a spider web for reference to design and simulate for the unusual space net,and some ground tests are carried out.(1)The optimal design of unusual space net structures.Assuming the hole and mass of the net are constant,and the tether length error is 5%,the net design is optimized in terms of net form and net hole,to yield a series of net structures.Preliminary performance analysis shows that the hexagon net and the hexagon net with rhombus holes are superior.(2)Mechanical property analysis of the space net.Proceeding from the characteristics of the viscoelasticity material,we analyze several tether models to look for an appropriate material model for the space net.In order to establish the model of the whole space net system,the mechanical analysis of the tether is conducted.(3)Simulation of the space net.Based on the current designed space net structures,we use the ANSYS/LS-DYNA software to analyze the space net performance in terms of its deployment area.Then,the optimal model is studied to investigate the influence of related parameters on the deployment area.(4)Ground tests.Ground tests are conducted to measure the displacement of the rigid bodies and the tether’s node.And the results are compared with the simulation results to reveal the influence of the wind and air friction.