Numerical Analysis on High-Altitude Airdrop Impact Processing of Water Bag

摘要

The impact process of water bag that was air-dropped from 200 m high altitude is discussed by using the method of numerical simulation; microscopic changes of the main mechanical parameters are obtained in the process of water bag airdropping. Judging from the changing process of parameters such as the changing form, the nodal displacement, the nodal speed, and so on, the main reason which leads to the destruction of water bag is that the liquid spreads rapidly and sharply at the landing moment; moreover, the side face of the water bag may be the most easily damaged part.