红外光电系统机械固定件的拓扑优化设计

Topology optimization design of mechanical fixed parts for infraredphotoelectric systems

红外光电系统机械件复杂度高,在满足稳定性要求的前提下,对结构的轻量化有着更急迫的需求。本文采用ANSYS拓扑优化方法对某红外光电系统进行拓扑优化设计,并以电源固定件为例,以结构柔度最小为设计目标,单元密度为设计变量,实现30%的体积约束,并对拓扑优化的结果进行模型重构。与初始经验设计方案对比,优化重构后的固定件减重37.8%,且结构的刚度和强度均得到了提升。进而表明,拓扑优化方法可以为红外光电系统结构的轻量化设计提供有利的借鉴。

The high complexity of the mechanical parts of infrared photoelectric system leads to a more urgent demand for the lightweight structures while meeting the stability requirements.In this paper,topology optimization method of ANSYS is used to optimize the topology design of an infrared photoelectric system,and take the power supply fixture as an example to achieve a 30%volume constraint with the minimum structural flexibility as the design objective,and the cell density as the design variable,and to reconstruct the model with the results of topology optimization.Compared with the initial empirical design,the optimized reconstructed fixed parts have a weight reduction of 37.8%and the rigidity and strength of the structure are improved.It is further indicated that topology optimization method can provide a favorable reference for the lightweight design of infrared photoelectric system structures.