The mathematical modeling of parachute inflation process and the calculation of opening shock, which is the maximum of the opening force. is of prime interest for the mission analysis and design of parachute system. The inflation process and inflation law of a typical flat circular personnel parachute are presented. Then the fundamental equation of the mathematical model of parachute inflation process was formulated. Finally, the present model is used to calculate opening force, and the factors that influence parachute opening shock are analyzed.
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