Aeroelastic Tailoring using Additively Manufactured Lattice Structures

Lattice structures are of interest to the aerospace industry due to their high specific stiffness and the large design freedom that they offer. For instance, this large design freedom can be used to aeroelastically tailor the structure to mitigate flutter. This paper describes a methodology for designing the internal structure of a wing as an additively manufactured lattice structure, while enforcing aeroelastic stability as a design constraint. A low-order model is developed for the dynamics of the lattice structure, which is then coupled to a physics-based transonic flutter model to yield a complete aeroelastic model of the wing. The approach is demonstrated on a test case of a wing in transonic flow, where it is shown that constraining the aeroelastic stability of the system adds only 3.5% weight while the flutter speed is increased by 3%.

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