大载重农用无人机静力学分析与优化设计  

Statics Analysis and Optimization Design of Heavy Load Agricultural UAV

作　　者：徐金明 尚书旗[1] 王东伟[1] 何晓宁[1] 李永超 王悦涛 王海清 张柏博 Xu Jinming;Shang Shuqi;Wang Dongwei;He Xiaoning;Li Yongchao;Wang Yuetao;Wang Haiqing;Zhang Baibo(Qingdao Agricultural University College of Mechanical and Electrical Engineering,Qingdao 266000,China;Yantai Yun Du Hai Ying UAV Technology Application Co.Ltd.,Yantai 264000,China)

机构地区：[1]青岛农业大学机电工程学院,山东青岛266000 [2]烟台云都海鹰无人机技术应用有限公司,山东烟台264000

出　　处：《农机化研究》2023年第10期16-23,共8页Journal of Agricultural Mechanization Research

基　　金：国家现代农业产业技术体系专项(CARS-13)。

摘　　要：为研究大载重农用无人机结构在各种工况下的变形和等效应力变化,并对不满足极限工况的结构进行优化,利用Ansys-Workbench中的Static Structural和Response Surface Optimization模块分别对无人机结构进行了静力学仿真和优化设计。在Static Structural模块中对模型进行空载、满载、极限工况下的静力学仿真,发现其机臂结构的强度可能不满足极限工况下的最大等效应力。因此,在此基础上利用Response Surface Optimization模块对机臂进行了基于响应面法的优化设计,通过LHS试验设计方法建立Kriging模型,最终得到全局最优解。实验结果表明:此解在极限工况下的最大变形较优化前减小44.9%,最大等效应力减小31.6%,满足结构材料的强度要求。此研究不仅为无人机的设计和优化提供了理论依据,而且为WorkBench优化设计方法在多旋翼无人机领域内的应用奠定了基础。In order to study the deformation and equivalent stress changes of such heavy-duty agricultural UAV structure under various working conditions,and optimize the structure that does not meet the limit conditions,this paper uses the Static Structural and Response Surface Optimization modules in Ansys-Workbench to carry out the statics of the flight platform structure,respectively.Simulation and optimization design.Firstly,the static simulation of the model under no-load,full-load and ultimate conditions is carried out in the Static Structural module,and it is found that the strength of the arm structure does not meet the maximum equivalent stress under the ultimate condition.Therefore,on this basis,the response surface optimization module is used to carry out the optimization design of the arm based on the response surface method.The Kriging model is established design method,the Kriging model is established,and the global optimal solution is finally obtained.The experimental results show that the maximum deformation of this solution under the ultimate condition is reduced by 44.9%compared with that before optimization,and the maximum equivalent stress is reduced by 31.6%,which meets the strength requirements of structural materials.This study provides a theoretical basis for the design and optimization of UAVs,and lays a foundation for the application of workbench optimization design method in the field of multi-rotor UAVs.

关 键 词：农用无人机 静力学仿真 优化设计 

分 类 号：S251[农业科学—农业机械化工程] S183[农业科学—农业工程]