Lightweight design of multi-habitat unmanned aerial vehicle's fuselage based on topology optimization
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.
multi-habitat vehicleupper and lower support structuresmodal analysistopology optimizationlightweight
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