飞机起落架结构拓扑优化设计及动态特性分析  

Topology optimization design and dynamic characteristics analysis of aircraft landing gear structure

作　　者：陈小龙 赵知辛[1] 张瑞阳 彭春雷[1] 张昌明[1] CHEN Xiaolong;ZHAO Zhixin;ZHANG Ruiyang;PENG Chunlei;ZHANG Changming(School of Mechanical Engineering,Shaanxi University of Technology,Hanzhong 723000,China)

机构地区：[1]陕西理工大学机械工程学院,陕西汉中723000

出　　处：《陕西理工大学学报（自然科学版）》2024年第2期1-8,共8页Journal of Shaanxi University of Technology:Natural Science Edition

基　　金：陕西省重点研发计划项目(2022GY-257);陕西省重点产业创新链项目(2023-ZDLGY-28)。

摘　　要：为实现飞机起落架系统高效承载下的轻量化,以着陆时冲击载荷下的结构刚度为约束条件,以最小质量为设计目标,建立了基于变密度法和优化准则算法的拓扑优化模型;根据该构型对外筒支柱结构进行了重构设计,并对优化设计区域开展强度和刚度校核;最后在Ansys Motion系统中建立了起落架落震动力学仿真模型,分析了飞机起落架系统在结构优化前后的动态特性,并与试验数据对比验证了该模型的正确性。结果表明:与原有结构相比,重构模型重量减少10.7%,最大等效应力降幅达到16.2%,系统缓冲效率提高了约2.4%,有效提升了起落架系统的轻量化水平和结构承载效能,研究结果可为飞机起落架系统的减重设计提供一定参考。In order to realize the lightweight of aircraft landing gear system under high efficiency load,a topology optimization model based on variable density method and optimization criterion algorithm was established with the structural stiffness under impact load as the constraint condition and the minimum mass as the design goal.According to this configuration,the external cylindrical structure is reconstructed,and the strength and stiffness of the optimized design area are checked.Finally,the landing gear landing vibration simulation model is established in Ansys Motion system,and the dynamic characteristics of the aircraft landing gear system before and after structural optimization are analyzed,and the correctness of the model is verified by comparing with the test data.The results show that compared with the original structure,the weight of the reconstructed model is reduced by 10.7%,the maximum equivalent stress is reduced by 16.2%,and the system buffering efficiency is increased by about 2.4%,which effectively improves the lightweight level and structural load efficiency of the landing gear system.The research results can provide some reference for the weight reduction design of aircraft landing gear system.

关 键 词：油气式起落架 落震动力学 拓扑优化 轻量化设计 

分 类 号：TH16[机械工程—机械制造及自动化] V226[航空宇航科学与技术—飞行器设计]