A quasi-steady approach is introduced for the analysis of flexible structural members protruding into flow fields. Static equilibrium is enforced for the structure while dynamic equilibrium is permitted for the flow. In principle, the method gives a complete fluid-structure interaction solution, subject to the equilibrium assumptions, but only the structural aspects of obtaining such a solution are examined. This approach is applied to the problem of a flexible annular inhibitor protruding into the interior flow field of a segmented solid rocket motor. A finite element structural model, and a finite difference flow model form the basis of the solution method. The structure is iteratively loaded, with load profiles determined by the flow after each iteration. The results show that large deflections can be expected of inhibitors in solid rocket motors, and that the limitations of the analytical structural model are critical.
Structural analysis of a flexible structural member protruding into an interior flow field
Strukturelle Untersuchung von flexiblen Bauelementen die in ein Strömungsfeld hineinragen
1993
8 Seiten, 12 Bilder, 1 Tabelle, 10 Quellen
Conference paper
English
European Patent Office | 2023
|