基于Altair Inspire的四旋翼无人机机身部件轻量化设计方法

Lightweight Design Method of Four-rotor UAV Fuselage Parts Based on Altair Inspire

无人机的续航能力是其性能优劣的一个重要指标,而影响续航的最主要因素是机身的质量,为了减轻无人机机身部件质量,利用Altair Inspire轻量化设计软件,对一种四旋翼无人机机身部件进行拓扑优化,几何重构、强度校核、并自动拟合重构得到优化模型,优化后的该模型仍存在一些缺陷,最后通过手动拟合重构得到进一步优化,达到在强度、最大位移和最小安全系数满足条件的情况下,尽可能减轻模型的质量,以达到轻量化的设计目的。结果表明,在满足强度、最大位移和最小安全系数要求的条件下,实现了71.8%的减重,有效减轻了质量,提高了无人机的续航能力,为无人机的轻量化设计提供了一种可行的方法。

The endurance ability of a UAV is an important index of its performance,and the most important factor affecting the endurance is the weight of the fuselage.In order to reduce the weight of the parts of the UAV's fuselage,this paper uses the lightweight design software Altair Inspire to carry out the topology optimization,geometric reconstruction,strength checking and automatic fitting reconstruction of a four-rotor UAV fuselage component to obtain the optimized model.The optimized model still still has some defects,and finally the weight of the model is reduced as much as possible under the conditions of strength,maximum displacement and minimum factor of safety,so as to achieve the goal of lightweight design.The results show that 71.8% weight loss is achieved under the conditions of meeting the requirements of strength,maximum displacement and minimum factor of safety,effectively reducing weight and improving the endurance of the UAV.This research provides a feasible method for the lightweight design of UAV.