摘要
机架是四旋翼无人机的重要支撑结构,机架结构的强度和刚度直接影响飞行安全,机架结构的轻量化是实现无人机长续航、高效率的关键,机架结构的振动稳定性也是设计的重要考虑因素。基于响应面法和拓扑优化方法,对某型民用无人机机架结构进行了优化设计研究。首先建立数学模型,将优化问题转化为机架结构的质量和强度的双目标优化问题,采用响应面法对机架结构参数进行重新设计,寻找最优参数组合,再通过拓扑优化方法,在保证结构强度的同时,对新机架进行减重设计,最后,经优化设计后的新机架减重56.2%,并且结构材料分布合理,结构位移量小且各阶模态均不会发生共振,满足设计要求。
The strength and stiffness of the frame structure directly affects the flight safety,and the light weight of the frame structure is the key to realize the long endurance and high efficiency of the Quadrotor UAV.Based on the response surface method and topology optimization method,the optimized design of a civil UAV frame structure is studied.Firstly,a mathematical model is established to transform the optimization problem into a dual-objective optimization problem of the mass and strength of the frame structure,and the parameters of the frame structure are redesigned using the response surface method to find the optimal combination of parameters.Finally,the optimized design of the new frame reduces the weight by 56.2%,and the structural material distribution is reasonable,the structural displacement is small and no resonance occurs in each order of mode,which meets the design requirements.
作者
朱贺
黄辰雷
杨利明
李静菲
ZHU He;HUANG Chenlei;YANG Liming;LI Jingfei(Civil Aviation Administration of China Acadamy,Civil Aviation Flight University of China,Guanghan 618300;Aviation Engineering Institute,Civil Aviation Flight University of China,Guanghan 681300;Division of Infrastructure and Airport,Civil Aviation Flight University of China,Guanghan 618300)
出处
《机械设计》
CSCD
北大核心
2023年第S02期130-135,共6页
Journal of Machine Design
基金
四川省科技厅省级科技计划重点项目(2019YFG0311)
中国民用航空飞行学院面上科研项目(J2022-110)
关键词
四旋翼无人机
机架
轻量化设计
响应面法
拓扑优化
Quadrotor UAV
frame
lightweight design
response surface methodology
Topology Optimization
