考虑机构柔性的可重复使用运载器海上着陆动力学分析OA

Vertical landing and recovery of a launch vehicle at sea can further reduce the launch cost of commercial space-flight,so this paper investigates the issue of reusable launch vehicle landing at sea.A vehicle landing dynamics model considering mechanism flexibility is established,and vehicle drop tests under various operating conditions are conducted.By comparing the vehicle drop test,the simulations of the dynamics model are consistent with test results,and the vehicle landing dynamics model considering the landing mechanism flexibility can simulate the vertical landing process of the vehicle more effectively than the rigid body dynamics model,which is more meaningful to guide the design of the reusable vehicle landing mechanism.Based on the vehicle landing dynamics model,a deck motion model and wind disturbance model are added to simulate the vehicle vertical landing dynamics at sea.The simulation results show that the sea landing causes the peak acceleration response of the vehicle,the main strut load and the buffer compression stroke to become larger,and there is a significant decrease in the landing stability of the vehicle.