基于增材制造的碳化硅双面反射镜设计与可靠性验证OA

To meet the requirements of high lightweighting and high stiffness for a Φ516 mm double-sided integral reflector-comprising the primary and quaternary mirrors in a coaxial four-mirror optical system-a method integrating multi-parameter optimization with silicon carbide(SiC)additive manufacturing is pro-posed based on conventional lightweight design principles.First,an initial reflector model was established from engineering experience,and key structural dimensions were selected to formulate a multi-parameter optimization framework.The parametric model was then optimized using a multi-objective genetic algo-rithm.The optimized reflector weighs 6.8 kg,achieving a 32.6%reduction relative to the initial design.After completion of 3D printing,a structural modal test was conducted,yielding a first-order natural fre-quency of 1 964 Hz.Following optical processing of both mirror surfaces,gravity impact,vacuum high-low temperature,and vibration tests were performed.The maximum change in surface figure accuracy be-fore and after these tests satisfied the specified requirements.These results confirm the reliability and sta-bility of the SiC double-sided reflector design and demonstrate the robustness of the SiC additive manufac-turing process for high-performance integral reflectors.