基于多项式维数分解法的起落架参数不确定性量化分析  

Quantitative analysis of landing gear parametric uncertainty based on polynomial dimensional decomposition method

作　　者：崔盼礼 贺尔铭[1,2] 宋得军[5] 杨正权 王彬文 CUI Panli;HE Erming;SONG Dejun;YANG Zhengquan;WANG Binwen(College of Civil Aviation,Northwestern Polytechnic University,Xi’an 710072,China;State Key Lab for Strength and Structural Integrity,Xi’an 710065,China;Aviation Technology Key Lab of Structural Impact Dynamics,China Aircraft Strength Research Institute,Xi’an 710065,China;Shaanxi Provincial Key Lab of Aircraft Vibration,Impact and Noise,Xi’an 710065,China;Shenyang Aircraft Design and Research Institute,Shenyang 110035,China)

机构地区：[1]西北工业大学民航学院,西安710072 [2]强度与结构完整性全国重点试验室,西安710065 [3]中国飞机强度研究所结构冲击动力学航空科技重点试验室,西安710065 [4]陕西省飞行器振动冲击与噪声重点试验室,西安710065 [5]沈阳飞机设计研究所,沈阳110035

出　　处：《振动与冲击》2025年第7期286-292,共7页Journal of Vibration and Shock

摘　　要：飞机起落架制造和加工过程中不确定性广泛存在,针对飞机起落架缓冲性能的求解问题,考虑油孔流量系数、气体多变指数的不确定性,首先建立了起落架二质量非线性动力学方程,构造了基于多项式维数分解(polynomial dimensional decomposition,PDD)方法的随机代理模型并进行了动力学分析,与蒙特卡洛模拟方法确定性分析得出的位移均值与标准差结果进行了对比,验证了PDD方法在处理起落架动力学这类非线性问题的正确性;后续使用PDD方法,分析油孔流量系数、气体多变指数在取不同的变异系数时二质量的响应均值、标准差以及概率特征的变化,研究二者的不确定性对起落架缓冲性能求解的影响。该研究所开展的油孔流量系数、气体多变指数不确定传播量化工作对后续起落架缓冲性能的可靠性设计具有一定的借鉴意义。Uncertainty widely exists in manufacturing and processing of aircraft landing gear.Here,aiming at solving problem of buffering performance of aircraft landing gear,considering uncertainty of oil hole flow coefficient and gas variability index,firstly,a two-mass nonlinear dynamic equation of landing gear was established,a random surrogate model based on the polynomial dimensional decomposition(PDD)method was constructed,and dynamic analysis was performed.The results were compared with displacement mean and standard deviation obtained with Monte Carlo simulation and deterministic analysis to verify the correctness of PDD method in dealing with the nonlinear problem of landing gear dynamics.Subsequently,PDD method was used to analyze changes in mean,standard deviation and probability characteristics of two masses’responses when oil hole flow coefficient and gas variability index taking different variation coefficients,and study effects of their uncertainties on solving landing gear buffering performance.It was shown that quantification of uncertain propagation of oil hole flow coefficient and gas variability index performed here can have certain reference significance for reliability design of landing gear buffering performance in future.

关 键 词：起落架落震 非线性 不确定性参数 多项式维数分解(PDD)方法 

分 类 号：TH212[机械工程—机械制造及自动化] TH213.3