Topology optimization of the internal structure of an aircraft wing subjected to self-weight load

Abstract

ABSTRACTA topology optimization design framework for structures including self-weight loads is presented. The proposed methodology applied to lifting structures aims to eliminate numerical instabilities due to the weight load while improving the overall solution quality. In this model, a power-law function is used to update the element density in the determination of the self-weight. The algorithm is tested and verified for a two-dimensional benchmark problem subjected to self-weight loads and a point force. Results show that the proposed method improves the discreteness of the design of structures subjected to lifting surface loads. Following the verification step, the proposed method is used to optimize the internal structure of an aircraft wing. The aerodynamic load is computed assuming a rigid wing body, and the loading condition is completed with the structure self-weight. Results show that, in this particular example, the self-weight load has a negligible influence on the optimal design.