Experimental study on the impact response of different structures water entry

There will be a big load on the structure after aircraft ditching and spacecraft water recycling, which has an important effect on the safety of the capsule structure and the people inside. Therefore the research of water impact has a practical significance. Base on the wedge and arc body model, the test of the body free falling on the water has been vertically investigated. The acceleration signals of the structure water entry are analyzed. These results indicated that the closed cavity of the structure has a great influence on the acceleration. The air in the cavity mainly affects the peak value of the acceleration and it has no effect on the changing tendency. The maximum value of arc body acceleration is much bigger than the wedge. And the closed cavity has no effect on the acceleration of the elastic body. The results have an important guiding significance for the design of aircraft and spacecraft.