Abstract
This paper presents the water landing dynamics simulation of a sounding rocket, obtaining dynamics characteristics of the interaction between the rocket payload module, the floatation airbag and the water. Using an explicit nonlinear dynamic finite element code, the model contains Lagrangian shell elements for rocket payload, membrane elements for the airbag and Eulerian elements for the water. The Fluid-Structure Interaction (FSI) technology is employed in the computation by transferring forces on nodes of coupling surfaces. In the paper, two landing attitudes are analyzed and compared. After analyzing dynamic response of airbag under different operating conditions, the minimum size is concluded. This dynamics simulation builds the foundation for the Engineering Model of the recovery system.
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