Finite element analysis of Supersonic panel flutter

INTRODUCTION The finite element method is a powerful tool to solve static and dynamic problems of structural analysis. Its application to flutter analysis can be envisaged in two ways. It can be used to obtain a more accurate modal shape of complex structures which in turn are introduced in traditional methods. The approach followed here is different, and consists in representing the non-stationary aerodynamic forces also by finite elements, that is, directly in terms of the generalized displace- ments used as unknowns. The resulting advantage is an increased flexibility and generality in the structural configurations that can be treated. The aerodynamic forces are evaluated using the linearized piston theory and follows the line first presented by Olson.' It is extended

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