THE HYDRO-ELASTIC BEHAVIOUR OF FLEXIBLE PANELS WITH INHOMOGENEOUS MATERIAL PROPERTIES AND ADDED RESTRAINTS

摘要

This paper presents the application of new approach that is a hybrid of theoretical and computational methods in thernlinear-stability analysis of elastic plates subject to infinite Reynolds-number fluid loading over one side. The methodrnpermits the extraction of system eigenvalues and eigenmodes for the fully coupled Fluid-Structure Interaction (FSI)rnsystem for complex configurations that are not amenable to the methods of conventional theoretical analysis. The panelrnconfigurations studied in this case involve plates with multiple hinge joints along their length and plates with spatiallyrnvarying properties. Results indicate that such complex boundary conditions strongly influence the stability of the panel.rnThese results have important implications for the use of material inhomogeneity and additional constraints to postponernthe hydro-elastic instability of flexible panels on ship hulls or for the use of compliant panels in drag-reductionrnstrategies.