摘要
起落架在飞机起降过程中起承受冲击载荷、吸收着陆撞击能量的作用,其着陆性能的优劣与系统的多参数设计相关。为研究起落架各设计参数对缓冲性能的影响程度,有效指导性能优化参数选择,本文以某型无人机起落架为研究对象,建立其着陆缓冲动力学分析模型,对缓冲系统重要结构充填参数性能影响的灵敏度进行分析,获取起落架缓冲性能优化关键参数组,并采用遗传算法对飞机着陆阶段冲击性能进行多目标优化。结果表明,主油孔流量系数、有效过流面积及有效压油面积对缓冲性能影响较为显著,缓冲器充气压力、充填容积对缓冲性能也有一定影响。经优化后的起落架缓冲性能获得提升,其中着陆最大载荷减小了4.06%,缓冲效率提升了4.44%。本文的研究成果将为后续高性能飞机起落架研发、缓冲性能分析与优化提供参考。
Landing gear plays the role of bearing impact load and absorbing landing impact energy during takeoff and landing.The landing performance of the landing gear is related to the multi-parameter design of the system.This paper takes the landing gear of a certain UAV as the research object,establishes the dynamic analysis model of its landing buffer,analyzes the sensitivity of the impact of the performance of the important structure filling parameters of the buffer system,obtains the key parameter group of the landing gear buffer performance optimization,and adopts genetic algorithm to carry out multi-objective optimization of the impact performance of the aircraft during the landing stage.The results show that the main oil hole flow coefficient,effective flow area and effective oil pressure area have significant effects on the buffering performance,and the buffer charging pressure and filling volume also have certain effects on the buffering performance.After optimization,the landing gear buffer performance is improved,the maximum landing load is reduced by 4.06%,and the buffer efficiency is increased by 4.44%.The research results of this paper will provide a reference for the subsequent development of high-performance aircraft landing gear,buffer performance analysis and optimization.
作者
朱晨辰
黄兆铭
刘水不腐
Zhu Chenchen;Huang Zhaoming;Liu Shuibufu(Aircraft Structure Research Institute of China,Xi’an 710065,China)
出处
《航空科学技术》
2025年第6期70-77,共8页
Aeronautical Science & Technology
基金
航空科学基金(2023M009023006)。
关键词
起落架
缓冲性能
敏感度分析
遗传算法优化
landing gear
buffer performance
sensitivity analysis
genetic algorithm optimization
