摘要
设计阶段的大型矿井提升机主轴承随机振动系统的设计可靠性分析因试验样本不足,无法获取振动加速度响应的完备概率信息。提出了概率信息不完备下大型矿井提升机主轴承设计可靠性分析的技术路线:滚动轴承多尺度耦合系统动力学模型-振动加速度概率密度演化-概率密度演化路径随机过程建模-振动功率谱密度的概率分布-基于条件概率的设计可靠度计算。运用已采集的工况数据驱动建立滚动轴承多尺度耦合系统动力学模型,开展了振动加速度概率密度演化研究;基于概率密度演化和Karhunen-Loève展开,提出了滚动轴承振动加速度的非平稳随机过程建模方法,获得了滚动轴承振动加速度随机序列的孪生数据;研究了大型矿井提升机主轴承振动加速度功率谱密度的概率分布,并计算了大型矿井提升机主轴承在服役时间上的设计可靠度指标。
In the design phase of a mine hoist’s main bearing,the reliability analysis of its random vibration cannot obtain complete probability information of the vibration acceleration response due to insufficient experimental samples.This paper proposes a new technical route for the reliability analysis of the main bearing of a mine hoist under incomplete probability information.This route in-cludes the dynamic model of a multi-scale coupling system for rolling element bearings,the probability density evolution of vibra-tion acceleration,stochastic process modeling of the probability density evolution path,the probability distribution of vibration pow-er spectral density,and the calculation of design reliability based on conditional probability.By using the collected condition data to drive the established dynamic model of multi-scale coupling system for rolling element bearings,the probability density evolution of vibration acceleration is carried out.Based on the probability density evolution and Karhunen-Loève expansion,a modeling ap-proach for the non-stationary random process of vibration acceleration of rolling element bearings is proposed.This approach ob-tains the twin data of the random sequence of vibration acceleration for rolling element bearings.The probability distribution of the vibration power spectral density for the main bearing of a mine hoist is studied,and the reliability index of the main bearing of a mine hoist within the service time is calculated.
作者
曹爽
卢昊
朱真才
张义民
CAO Shuang;LU Hao;ZHU Zhen-cai;ZHANG Yi-min(School of Mechanical&Electrical Engineering,China University of Mining and Technology,Xuzhou 221008,China;Jiangsu Key Laboratory of Mine Mechanical and Electrical Equipment,China University of Mining and Technology,Xuzhou 221008,China;School of Mechanical and Power Engineering,Shenyang University of Chemical Technology,Shenyang 110142,China)
出处
《振动工程学报》
EI
CSCD
北大核心
2024年第6期915-927,共13页
Journal of Vibration Engineering
基金
国家重点研发计划项目(2017YFF0210604)
江苏省高校优势学科建设工程资助项目(PAPD)
国家留学基金项目(CSC202106420056)。
关键词
随机振动
设计可靠性分析
孪生数据
大型矿井提升机主轴承
概率信息不完备
random vibration
design reliability analysis
twin data
main bearing of a large mine hoist
incomplete probability information
