基于拓扑优化的多栖无人飞行器机身结构轻量化设计  

Lightweight design of multi-habitat unmanned aerial vehicle’s fuselage based on topology optimization

作　　者：姚正康 龚鹏 姬书得[1] YAO Zhengkang;GONG Peng;JI Shude(School of Aeronautics and Astronautics,Shenyang Aerospace University,Shenyang 110136;School of Mechanical and Electrical Engineering,Shenyang Aerospace University,Shenyang 110136)

机构地区：[1]沈阳航空航天大学航空宇航学院,辽宁沈阳110136 [2]沈阳航空航天大学机电工程学院,辽宁沈阳110136

出　　处：《机械设计》2024年第9期58-65,共8页Journal of Machine Design

基　　金：辽宁省教育厅科学研究项目(JYT2020074)。

摘　　要：文中以设计的一款多栖无人飞行器的机身受力框架结构为研究对象,在ANSYS软件中分析该机身在3种典型工况下的静态特性。根据分析结果对其结构中起主要支撑作用的上下支撑结构进行静态特性分析和预应力模态分析,得到其前6阶固有频率及对应振型。基于优化准则法采用拉格朗日函数推导出优化的数学模型,并以SIMP为插值模型对其进行了拓扑优化。通过静、动态特性的分析对比,优化后的上下支撑结构最大应力处的应力值分别降低了2.04%和2.51%,总质量减小了19.2%,且优化后结构的固有频率高于优化前的固有频率,在工作中不会发生共振现象,该方法对多栖无人飞行器机身结构轻量化设计具有重要指导意义。In this article,with the focus on the force frame mechanism of a multi-habitat unmanned aerial vehicle’s fuse-lage,the static characteristics under three typical working conditions are analyzed in the ANSYS software.According to the ana-lytical results,efforts are made to explore the static characteristics and prestress modes of the upper and lower support structures,which play a key role in the whole mechanism;both the first 6-order natural frequencies and the corresponding vibration modes are obtained.With the help of the optimization criterion method and the Lagrange function,the optimized mathematical model is derived;the topology optimization is carried out with SIMP as the interpolation model.Through the analysis and comparison of the static and dynamic characteristics,the stress values at the maximum stress of the optimized upper and lower support structures re-duce by 2.04%and 2.51%respectively,and the total weight reduces by 19.2%.The structure’s natural frequency after optimi-zation is higher than that before optimization;resonance can be avoided.This method provides guidance for lightweight design of the multi-habitat unmanned aerial vehicle’s fuselage.

关 键 词：多栖飞行器 上下支撑结构 模态分析 拓扑优化 轻量化 

分 类 号：TJ03[兵器科学与技术—兵器发射理论与技术]