The finite element technique in the determination of wing flutter speed of aircraft

Abstract EN

The determination of flutter speed of aircraft is of a prime importance.

This is done to ensure that the aircraft is flutter free within its flight envelope.

The present method for the determination of flutter speed uses the finite element technique to calculate the mass and stiffness distribution of the whole structure of the aircraft and hence to compute the natural frequencies and the mode shapes of the complete structure.

After adding the aerodynamic forces Theodorsen method is used to solve the flutter stability determinant, and1the flutter speed is determined by the point of intersection of the real and imaginary root loci.

The present method is used to determine the flutter speed of a commuter airliner and the results are given.