Sensitivity Analysis of Flutter of A Two-Degree of Freedom Linear Aeroelastic System
ABSTRACT: This paper
deals with the
problem of the
aeroelastic stability of
a typical aerofoil
section with two degrees of freedom induced by unsteady aerodynamic
loads. A method is presented to model
the unsteady lift
and pitching moment
acting on a
two dimensional typical
aerofoil section, operating under
attached flow conditions
in an incompressible flow.
Starting from suitable generalisations and
approximations to aerodynamic
indicial functions, the
unsteady loads due to
an arbitrary forcing
are represented in
a state-space form.
From the resulting equations of motion, the flutter
speed is computed through stability analysis of a linear state-space system.
The sensitivity analysis
of the aeroelastic
stability boundaries to
the structural parameter is
evaluated. The results
show that the
parameter with the
greatest influence on flutter speed is the center of gravity.
Author: Riccy Kurniawan
Journal Code: jptmesingg110001
