某型教练机因吊舱结构更改,需要对下半框进行重新设计,以利于载荷的传递。本文根据其受力形式,在一定强度和刚度约束条件下、在Optistruct中对其进行拓扑和尺寸优化。结构优化后与初始结构的有限元分析对比发现,其结构的应力水平下降、刚度提高,并减少了下半框的重量。 A trainer aircraft due to changes in the structure of the pod, you need to redesign the lower half box, in order to facilitate the transfer of load. According to the form of its force, this paper optimizes its topology and size in Optistruct under certain strength and stiffness constraints. Finite element analysis of the structure after optimization and initial structure comparison shows that the stress level of the structure is reduced, the rigidity is increased, and the weight of the lower half frame is reduced.