The Dynamic Numerical Simulation Of The Parachute Inflation

The inflation process is the most important and complicated phase for a parachute during itsworking process. Hence, it is of vital significance to study the discipline of inflation process andinflation performance for research of parachute working process.In this paper, the primary algorithms of LS-DYNA are firstly discussed on the basis oftheoretical principle, and some important fluid-structure interaction algorithms are meticulouslyanalyzed, which lay a solid foundation for understanding and mastering the problem solvingapproach and principle of LS-DYNA. Then, the simulation model of parachute and flow field areestablished by means of LS-DYNA for numerical simulation of inflation process, and some keyparameters for controlling of fluid-structure interaction process are set and illustrated. Finally, thenumerical simulation of “infinite mass” inflation process and “finite mass” inflation process areconducted, and some main parameters under these two circumstances, i.e. inflation duration,change of projected area, parachute-opening dynamic load, and stress distribution of canopy thatcharacterize the inflation performance are obtained and analyzed. The results are well consistent withwhat have been calculated by empirical formula and experimental analysis, and thereforeverify the effectiveness of the present approach by means of LS-DYNA.“infinite mass” inflationprocess and “finite mass” inflation process are studied.The studies in this paper gain some meaningful results, provides a feasible analysis method fordynamic simulation of recovery system as well as designing of landing system of Martian probe...