滚动轴承可靠性评价方法研究

发布时间：2018-03-22 02:34

本文选题：滚动轴承　切入点：可靠性　出处：《中国计量学院》2012年硕士论文　论文类型：学位论文

【摘要】：随着滚动轴承生产制造水平的发展，，轴承寿命有了很大的提高。在可靠性试验中经常会发生少失效、单失效甚至无失效试验结果，导致传统的评价方法难以处理并做出准确的可靠性评价。为此，本文从数理统计中Bayes理论与可靠性试验中序贯试验方法两方面，对上述问题进行理论和试验研究；为方便上述研究成果的使用和推广，特此编制了相应的计算评价软件系统。首先，对课题来源等做了详细说明，阐述了滚动轴承寿命试验及可靠性评价的重要意义，给出了滚动轴承寿命评价的常用方法。在此基础上给出了本文研究的主要内容和组织结构。其次，论述了滚动轴承可靠性评价理论和可靠性试验方法。详述了滚动轴承寿命服从的Weibull分布，讨论了Weibull分布相关参数和可靠性指标。再次，分别从Bayes理论和序贯试验方法两方面展开论述。论述Bayes应用于可靠性评价的理论方法和步骤。给出了滚动轴承在小样本少失效条件下，寿命分布参数和可靠度、可靠寿命与平均寿命等可靠性指标估计。并将Bayes方法和最佳线性不变估计方法进行比较，以证实Bayes方法的有效性。然后，论述了滚动轴承序贯试验的理论方法与步骤。重点研究了滚动轴承分布形状参数的不同对产品生产方风险和使用方风险的影响。最后通过计算机仿真模拟试验，定量分析了上述问题。在理论研究的同时，结合杭州轴承试验研究中心试验数据进行实例研究。再后，基于MATLAB GUI设计和实现了滚动轴承可靠性评价软件系统。本系统是基于MATLAB R2010b平台进行开发，实现了滚动轴承Bayes方法可靠性评价，能够得到参数和可靠性指标的点估计和区间估计；常规估计法可靠性评价，包括最佳线性不变估计、最佳线性无偏估计、极大似然估计和最小二乘法等；序贯试验方法可靠性评价，建立截尾序贯验证试验方案。最后，对全文的研究内容与结果进行了总结，并提出了未来的研究方向。
[Abstract]:With the development of rolling bearing manufacturing level, bearing life has been greatly improved. The traditional evaluation method is difficult to deal with and make accurate reliability evaluation. Therefore, this paper makes theoretical and experimental research on the above problems from the aspects of Bayes theory in mathematical statistics and sequential test method in reliability test. In order to facilitate the use and popularization of the above research results, a corresponding calculation and evaluation software system is developed. First of all, the source of the project is explained in detail, and the significance of life test and reliability evaluation of rolling bearing is expounded. The common methods for evaluating the life of rolling bearings are given, and the main contents and structure of this paper are given. Secondly, the reliability evaluation theory and reliability test method of rolling bearing are discussed, and the Weibull distribution of rolling bearing service life is described in detail, and the related parameters and reliability index of Weibull distribution are discussed. Thirdly, the Bayes theory and sequential test method are discussed respectively. The theoretical methods and steps of Bayes application in reliability evaluation are discussed. The life distribution parameters and reliability of rolling bearings under the condition of small sample and less failure are given. The reliability indices such as reliability life and average life are estimated, and the Bayes method and the optimal linear invariant estimation method are compared to verify the validity of the Bayes method. Then, the theoretical method and procedure of rolling bearing sequential test are discussed. The influence of different shape parameters of rolling bearing distribution on the risk of product producer and user is studied. Finally, the computer simulation test is carried out. The above problems are quantitatively analyzed. At the same time, the experimental data of Hangzhou bearing Experimental Research Center are studied. Then, based on MATLAB GUI, a rolling bearing reliability evaluation software system is designed and implemented. The system is developed on the platform of MATLAB R2010b, and the Bayes method reliability evaluation of rolling bearing is realized. The point and interval estimates of parameters and reliability indices can be obtained, the reliability evaluation of conventional estimation methods, including the optimal linear invariant estimate, the best linear unbiased estimate, the maximum likelihood estimation and the least square method, etc. The reliability evaluation of sequential test method was carried out, and the test scheme of truncated sequential test was established. Finally, the research contents and results are summarized, and the future research direction is proposed.
【学位授予单位】：中国计量学院
【学位级别】：硕士
【学位授予年份】：2012
【分类号】：TH133.33

【参考文献】