Design method for bionic topology optimization of high-specific-stiffness mirrors based on additive manufacturing

Aiming at the demand for high-specific stiffness of space optical mirrors, this study proposes a bionic topology optimization design method for mirrors based on additive manufacturing. First, the principle and process of the Voronoi structure bionic topology optimization method are presented. The optimal design and analysis of the mirrors were then conducted using this method. Subsequently, the mirror blanks were fabricated using selective laser melting (SLM) technology. The modal testing results demonstrated that the first-order natural frequencies of the two mirrors designed in this study were enhanced by 31.78% and 60.20%, respectively, compared to traditional mirrors with the same lightweight ratio. This method offers a novel design and optimization approach, to our knowledge, for space optical mirrors.