基于雨流频次外推的ZLK50型装载机液压缸载荷谱编制  

COMPILING METHOD OF LOAD SPECTRUM OF ZLK50 TYPE LOADER HYDRAULIC CYLINDER BASED ON RAIN FLOW FREQUENCY EXTRAPOLATION

作　　者：高天宇[1,2] 李焕良[2] 郑铮[2] 邵立福 潘军军[2] 

机构地区：[1]中央军委后勤保障部工程兵科研三所,洛阳471023 [2]解放军理工大学野战工程学院,南京210007 [3]总装工程兵科研一所,无锡214035

出　　处：《机械强度》2017年第4期951-956,共6页Journal of Mechanical Strength

基　　金：江苏省青年科学基金(BK2012061)资助~~

摘　　要：针对实际工况下ZLK50型装载机液压系统载荷谱编制方法的研究,构建了基于信号无线采集方式的液压缸多工况的测试方案,统计了转斗液压缸所受载荷的时间历程,根据"from-to"形式的雨流矩阵数据统计方法,提出了基于核函数估计的幅值雨流矩阵非参数频次外推方法,以此为据建立了转斗液压缸铲掘阶段八级程序载荷谱,并完成了ZLK50型装载机转斗液压缸全作业阶段的程序加载谱编制,为装载机液压缸疲劳寿命估计提供数据支撑。For the research on the method of building the load spectrum of ZLK50 type loader hydraulic system under the actual working conditions,a measurement scheme of multiple working conditions of the hydraulic cylinder is proposed based on the signal wireless acquisition mode.Statistic calculation of the time history of the bucket hydraulic cylinder load is carried out.Based on the statistical method of the rain flow matrix data in the shape of ＂from-to＂,a non-parametric frequency extrapolation method of the amplitude rain flow matrix based on kernel function estimation is introduced.According to the method,the eight stages＇ program load spectrum of the bucket hydraulic cylinder in digging stage is established,and the program loading spectrum compilation on full operation stage of the hydraulic cylinder is finished.The data support for the fatigue life estimation of the loader hydraulic cylinder is provided.

关 键 词：工程机械 载荷谱 雨流频次外推 核密度估计 

分 类 号：TH243[机械工程—机械制造及自动化]