海上空投轨迹建模及仿真分析

Modeling and Simulation Analysis of Airdrop Trajectory at Sea

海上空投物资时,物资最终落水点会受到诸如风场、抛投方式、减速伞等多种干扰因素的影响,为分析各种干扰因素对投放轨迹及落水点的影响,开展了空投轨迹建模、仿真计算及分析研究。通过CFD数值模拟得到投放物的气动力系数,结合飞行力学控制方程建立投放轨迹的数学模型,并进行仿真计算。分析结果表明:使用减速伞可以显著减小着水冲击载荷,逆风空投会导致抛投物俯仰角波动,不利于准确空投。

When airdropping materials at sea,the final drop point of the material will be affected by various interference factors such as wind field,throwing method,deceleration parachute,etc.In order to analyze the influence of various interference factors on the drop trajectory and falling point,the airdrop trajectory modeling,simulation calculation and analysis research are carried out.Through the CFD numerical simulation,the aerodynamic coefficients of the dropped objects are obtained.Combined with the flight dynamics control equations,the mathematical model of the dropped trajectory is established,and the simulation calculation is carried out.The analysis results show that the use of a deceleration parachute can significantly reduce the impact load of water,and an upwind airdrop will cause the pitch angle of the projectile to fluctuate,which is not conducive to accurate airdrop.