Abstract
A joint research effort between the U.S. Army Soldier Systems Command (SSCOM), Natick Research, Development and Engineering Center and the University of Connecticut has further enhanced a 3-D Structural Dynamic Finite Element Code (SD) to predict the behavior of parachute systems. The code is being modified and coupled to Computational Fluid Dynamics (CFD) codes by SSCOM, UConn and Army High Performance Computing Research Center (AHPCRC) researchers. This paper will discuss the current state of development of the code and present examples. 3-D dynamic simulations to be presented include, 1) the inflation and spin control of a cross canopy, 2) the prediction of a ram-air parafoil's shape and steady state flight, and 3) the opening of a round canopy initially near a line stretch configuration. The approximations and assumptions used in the model and detailed results of the predicted time-dependent motions, orientations and stresses will be presented. Other modeling capabilities of the SD code will also be discussed which include its preparation for numerical coupling to CFD software.
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