Investigation of Panel Flutter under the Effect of Liquid Sloshing

Abstract

This paper presents a numerical model for investigation of aeroelastic behavior of an arbitrary-shaped panel with arbitrary boundary conditions under the effect of supersonic external flow and internal liquid sloshing simultaneously. A finite-element model is used to describe the structural dynamics along with the linear piston theory for describing the supersonic external flow effects. Also a potential flow model discretized by the boundary element method is used for describing the internal flow field. Using modal analysis technique a coupled fluid-solid interaction reduced-order model is developed for the system. The developed model is used for investigation of dynamic stability boundaries of the system for different conditions of internal fluid, and new dynamic behaviors is observed in interaction of structure with internal and external flow simultaneously.