多失效模式履带车辆传动齿轮可靠性灵敏度分析  

RELIABILITY SENSITIVITY ANALYSIS OF TRACKED VEHICLE GEAR TRANSMISSION BOX WITH MULTIPLE FAILURE MODES

作　　者：闫思宏 陶凤和[1] 贾长治[1] YAN SiHong;TAO FengHe;JIA ChangZhi(Department of Guns Engineer,Ordnance Engineering College,Shijiazhuang 050003,China)

机构地区：[1]军械工程学院火炮工程系,石家庄050003

出　　处：《机械强度》2019年第3期641-646,共6页Journal of Mechanical Strength

基　　金：河北省科技厅计划项目(16211806D)资助~~

摘　　要：为了解决不同失效模式存在时履带车辆传动齿轮的可靠性灵敏度分析问题,运用随机摄动理论、四阶矩技术与Edgeworth级数,推算出不同失效模式的统计相关特性及可靠性指标,并求解出随机变量参数服从任意分布的部件各失效模式可靠度。利用机械部件失效模式少且一种失效即整体失效的特点,将失效模式串联模型视为部件的失效。在此基础上,结合梯度算法得到随机参数均值与方差的灵敏度计算公式。通过实例的计算验证表明,此方法可有效地估算多失效模式下机械零部件的灵敏度数值,为机械部件的优化设计提供参考。In order to solve the problem of reliability sensitivity analysis of tracked vehicle transmission gears in the presence of different failure modes,the random perturbation theory,the fourth moment method and Edgeworth series are employed to calculate the statistical correlation and reliability index of each performance function of the failure modes,and the reliability of the failure modes of the mechanical component with the arbitrary random distribution parameters.According to the future that only a few potential failure modes existed in the component and the overall fails when a failure mode occurs in parts,the failure of the component is regarded as the failure of a series system.On this basis,the calculating formulas of reliability sensitivity of the mean and variance of random variables are derived with the gradient method.The example illustrates that this method could effectively estimate the reliability sensitivity of mechanical components with multiple failure modes and provide reference for the optimization design of mechanical components.

关 键 词：多失效模式 任意分布参数 灵敏度设计 传动齿轮 四阶矩 可靠性 

分 类 号：TH122[机械工程—机械设计及理论]