空投方舱入水静力分析研究OA北大核心CSTPCD

Aiming at the problem of air dropping shelter by parachute into water,hydrostatic analysis is conducted to determine the optimal water entry angle under typical loading conditions.The main scale and ship parameters of the shelter are determined.Firstly,the hydrostatic characteristics under different drafts are calculated by assuming the water entry angle;then,the recovery moments at bow water entry and stern water entry are calculated by assuming the height of the center of gravity,and the recovery moment surface mappings are obtained;finally,the overturning moments under three typical loading conditions of overload,full load and no load are calculated to further determine the hydrostatic equilibrium curves of water entry and obtain the best water entry angles under three typical loading conditions.The results show that the best water entry angles are 38°for overload,10° to 90° for full load and 12° for no load at bow water entry;the best water entry angles are 58° for overload,55°for full load and 51°for no load at stern water entry.The results can be used to constrain the best water entry angle for other loading conditions.Through the water entry angle requirement for air dropping shelter into water,the height of the center of gravity can be constrained to a feasible domain under a certain load condition,providing technical reference data for the subsequent design and air dropping into water.