多工况下某火炮摇架拓扑优化设计

选取了某火炮摇架承载最恶劣的两个工况,采用基于变密度方法的结构拓扑优化技术,以摇架多工况刚度最大化为优化目标,以体积比为约束条件,通过优化得到了设计区域的密度云图,去除低密度区域后得到了摇架的拓扑结构模型,再对两个工况下得到的几何模型进行布尔求和操作以获得最终的优化结果。经过有限元分析,拓扑优化后的模型刚强度与优化前相比略有提升,质量有所下降,证明了该拓扑优化设计是合理的。

Research on Topology Optimization of Howitzer CradleUnder Multiple Loads

By choosing the two of the most terrible subcases which the artillery cradle bears, topology optimization based on density variables method was studied. In the optimization, the minimum compliance index considering multiple static load conditions was taken as an objective function, and the fraction of design volume as the constraint. By the optimization, density contours of design area can be obtained. The topological structure model of cradle can be obtained after removing low density area. In order to get the last optimization results, a boolean sum operation should be applied to between the geometric model from two subcases. By the finite element analysis, the stiffness of the cradle optimized with the topology optimization method is almost the same as the one before optimizing, and the weight has some reduction. The result proves that the topology optimization is reasonable.