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为提高某机载天线单元反射板刚度和强度,减少结构质量,使用基于形貌优化的优化设计方法,对反射板进行优化,分析结果表明:优化前后反射板的质量分别为4.65kg和4.11kg,优化后质量降低11.6%;优化前后冲击工况反射板的最大变形分别为10.05mm和4.11mm,优化后变形降低59.1%,优化前最大应力为98.93MPa,优化后降低33.0%;优化前后反射板的一阶安装模态均为弯曲模态,其振型一致,特征频率分别为76.06Hz和91.42Hz,特征频率提高38.8%;非钣金类结构可使用基于形貌优化的设计方法进行优化设计,得到加强筋的形状和位置。
In order to improve the stiffness and strength of the reflecting plate of an airborne antenna unit and reduce the structural quality, the optimal design method based on topography optimization is used to optimize the reflecting plate. The results show that the mass of the reflecting plate before and after optimization are 4.65kg and 4.11kg respectively , And the mass after the optimization is reduced by 11.6%. The maximum deformation of the reflector before and after impacting is 10.05mm and 4.11mm respectively, the deformation after deformation is reduced by 59.1%, the maximum stress before optimization is 98.93MPa, and the optimization is decreased by 33.0% The first-order mounting modes of the plates are all bending modes with the same mode shapes, the characteristic frequencies are 76.06Hz and 91.42Hz respectively, and the characteristic frequency is increased by 38.8%. The non-sheet metal structure can be optimized by using the topology-based design method Design, get stiffener shape and position.