## 5 Simulation Analysis of Traction Dynamics of the Space Flexible Web
### Analysis of the Expansion Process of New Space Flexible Web
The simulation process of the expansion of the new space flexible web is shown in Figure 21 below, Figure 21a-h show eight typical poses in the process of \"launch-unfold-fully unfold-partial retracement of the web.\" According to Figure 21a-f, it takes about 0.162 s for the new space flexible web to go from its folding storage state to unfolding to the maximum area. The unfolding time is longer than the two pure flexible rope web structural models above. By observing the detailed structural features of the new type of space flexible web at different moments, it was found that the existence of an umbrella coat unit can improve the flatness and stability of the local rope web structure of the new space flexible web, which plays a vital role in the rope support and the fixation of the EFP warhead. Observation of Figure 22 shows that in the expansion process of a new type of space flexible web, the force of radial web twine is more significant than ring web twine, and early on, most of the ring web twine is in a flabby condition. The axial tension peak of the new space flexible web continuously circulates in the radial mesh according to the law of \"upper mesh rope-lower mesh rope.\" By analyzing the tension cloud diagram, it can be seen that when the deployed area of the rope web reaches 86% of the maximum open area, the axial tension value of the overall circular mesh is gradually greater than that of the radial mesh. The maximum tension value of the rope segment of the new spatial flexible mesh appears at the position of the traction rope at 0.171 s, which is about 5.113 \(\times\) 10\({}^{4}\) N, and the peak time is later than that of the traditional rope web and the topological rope web. The overall variation law is consistent with the two pure flexible mesh rope structure models. Moreover, due to the high velocity in the XY plane, the EFP warhead, the canopy, and the web rope in the middle of the ring are squeezed in the radial direction with the force transfer between the web ropes during the launch and lift off. Figure 21: Sketch of the expansion process of the new flexible space web. The dynamic characteristics of the traditional rope web and topological rope web are compared and analyzed. A total of five characteristic points of the traction body and a new space flexible web interception unit are selected to analyze the simulation results, as shown in Figure 23 below. Among them, the four feature points of the new space flexible web are the traction rope feature point A, the hexagonal edge line corner point B at the bottom of the EFP, the hexagonal edge line corner point C at the intersection of the outer edge line of the rope web, and the rope inside the rope web feature point D.  
As shown in Figure 24 below, the velocity values of the three directions of the traction body X, Y, and Z are 43.3 m/s, 25 m/s, 50 m/s, respectively, and the resultant velocity of the three directions is 71 m/s. The variation trend of the velocity curve of the traction body is consistent with the traditional rope web and topological rope web mentioned above. Since the main body of the rope web of the new space flexible web is directly connected to the traction body through the traction rope, the movement of the EFP rope segment unit and the change of the web type will affect the speed change of the traction body during  
Figure 23: Characteristic point diagram of new space flexible web simulation analysis. Figure 22: Axial load of the new space flexible web rope segment. the expansion process. Compared with the traction body, the development process of the velocity value of the flexible web is messy during the unfolding process of the new space flexible web. After the initial steep increase in each characteristic point of the flexible web, the overall trend of the velocity value of the flexible mesh is decreasing.