Dual-Scale Optimization Design and Performance Analysis of Aircraft Rudder Structure

This paper focuses on the performance optimization of the control surfaces of aircraft. A two-scale optimization design method to enhance the mechanical properties of the control surfaces is proposed. Firstly, the topology optimization of the control surface structure is carried out to find the main load-bearing areas. Secondly, the periodic microstructure with the optimal stiffness is designed by joint optimization. After the above work is completed, the optimization results of the first step are reconstructed for the convenience of design and manufacturing. The periodic microstructures optimized in the second step are selectively filled according to the areas with concentrated material density, so as to obtain the configuration of the two-scale topology optimization design. By analyzing several structures, the obtained configuration is compared with the single-optimization configuration, the filled configuration and the traditional configuration respectively. The mechanical properties of the two-scale configuration are significantly improved under the premise of equivalent mass. Therefore, the numerical example results prove the effectiveness of the two-scale design combining macro and micro structure optimization.