Flutter control using shape and topology optimization

Aeroelastic flutter is one of the key limiting factors for the design of modern light-weight aircraft structures. Since the onset of flutter is a result of the interaction of aerodynamic forces and corresponding structural response, an optimal design configuration that mitigates such effects needs to be achieved using a multidisciplinary approach. We present a sequential flutter optimization framework with aero-structural design considerations. A binary flutter optimization routine results in maximum flutter speed with optimal location for the center of gravity and elastic axis, followed by an aerodynamic shape optimization at the corresponding critical flutter Reynolds number. In the final step of the optimization procedure, a materialbased topology optimization results in a lighter structure with respect to optimized outer mould line and optimal location of center of gravity and elastic axis.