单旋翼无人直升机龙骨结构可靠性拓扑优化设计

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中图分类号：TP391.99；V275.1；V214.1 文献标志码：B

Reliability topology optimization design for single rotor unmanned helicopter keel structure

WAN Zeguo， WANG Yufeng，WU Xiaoming （School of Aerospace Engineering，Xiamen University，Xiamen 3611O2，Fujian，China）

Abstract：As to the lightweighting of the keel structure of a certain type of single rotor unmanned helicopter，the variable density method is used for reliability topology optimization design. Starting from the reliability of the structure，two reliability topology optimization models，flexibility minimization model and stress minimization model，are established under volume constraints.The characteristics of the two optimization models are compared and analyzed，and a secondary design is carried out to obtain an optimized configuration of the single rotor unmanned helicopter keel structure. The analysis results show that the stress and displacement performance of the optimized configuration can meet the normal working requirements of the single rotor unmanned helicopter，and it reduces weight by 25.1% compared to the original design structure， achieving the goal of lightweight design.

Key words：keel； topology optimization；variable density method； lightweight； finite element

0引言

升机整机轻量化设计也成为重要的研究课题[1-3]龙骨是单旋翼直升机的主要受力部件，因此增强龙骨结构的强度和刚度是可靠性拓扑优化的首要问题[4]。（剩余4947字）