A Study of the Fluid-Structure Interaction Response of a Parachute Suspension Line under a Range of Operating Tensions using ICFD and CPFD

摘要

Parachute suspension lines generate and shed vortices as a result of the cross-flow of air, and these vortices induce fluctuating drag and lift forces. These fluctuating forces introduce system performance degradations, and the excited vibrations can often be heard for several kilometers. To assist in developing a fundamental understanding of the relationship between the suspension-line architecture, e.g. surface geometry and tensile load, torsional stiffness, and the associated vortex-induced vibrations, a series of cyber-physical fluid dynamics (CPFD) experiments has been conducted by Olson et al. In the current research, the CPFD system is modeled using the LS-DYNA incompressible fluid dynamics (ICFD) solver, and is analyzed as a two-way FSI problem. This paper explores modeling the CPFD experiments with an incompressible fluid solver (ICFD) where the objective is to understand how the vibration response of the line changes as a function of the torsional stiffness and geometry of the suspension line.