某手掷式无人机机翼结构拓扑优化设计研究

为解决某型手掷式无人机机翼结构重量占比高的问题，采用一种多变量结构拓扑优化设计方法。以结构重量最小为优化目标，以Fluent软件计算的气动力为载荷输入，以Nastran软件计算的结构最大形变、最大应力和屈曲特征值为约束，以机翼结构尺寸为优化变量进行减重优化设计。结构性能仿真结果表明，优化后机翼结构减重21.7%且满足结构安全性能约束要求。可提升该无人机续航时间38%，增加有效载荷278 g。优化后机翼结构尺寸的变化规律也为同类型飞机机翼结构设计提供了参考。

Study on Wing Structure Topology Optimization Design of a Hand Throw Unmanned Aerial Vehicle

To solve the high weight ratio problem of a hand throw UVA (Unmanned Aerial Vehicle) wing structure, a multivariable structure topology optimization design method is proposed. The method, which optimizes the target with minimum structure weight, takes the air dynamic force computed by Fluent as the load input conditions, takes the max displacement, max strain and buckling eigenvalue calculated by Nastran as restrain and takes wing structure size as optimization variable. The structure performance simulation results show that after the optimization, the structure weight is reduced by 21.7% which meets structure safety constraints and can improve the cruise time 38% and increase payload by 278 g. Meanwhile, the change law of the optimization variable can also provide reference for the structure design of this type of aircraft.