Research on gear reliability based on improved fourth moment

WANG ChunRong; ZHOU FuPing; XIA ErDong; GAO Hao

doi:10.16579/j.issn.1001.9669.2024.03.015

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Research on gear reliability based on improved fourth moment

更新时间：2024-07-05

- Research on gear reliability based on improved fourth moment
- Journal of Mechanical Strength Vol. 46, Issue 3, Pages: 636-642(2024)
- 作者机构：
  
  1. 福建农林大学机电工程学院
  2. 三明学院机电工程学院
- 作者简介：
- 基金信息：
- DOI：10.16579/j.issn.1001.9669.2024.03.015
  CLC： TB114.3
- Published：15 June 2024，
- 稿件说明：
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WANG ChunRong, ZHOU FuPing, XIA ErDong, et al. Research on gear reliability based on improved fourth moment. [J]. Journal of Mechanical Strength , 2024,46(3):636-642.
DOI：

WANG ChunRong, ZHOU FuPing, XIA ErDong, et al. Research on gear reliability based on improved fourth moment. [J]. Journal of Mechanical Strength , 2024,46(3):636-642. DOI： 10.16579/j.issn.1001.9669.2024.03.015.

摘要

齿轮是最常用的传动部件，其常见的失效模式为齿面点蚀与齿根断裂。为了快速、精确地对其进行可靠性分析，提出了一种考虑失效相关的改进四阶矩法。首先，根据失效机制分别建立齿面接触疲劳与齿根弯曲断裂失效的可靠性模型。其次，为提高传统四阶矩求解精度，先使用改进一次二阶矩法求出的二阶可靠性指标，再求得新四阶可靠性指标，从而提高单一失效模式的可靠性求解精度；然后，基于条件概率降维法计算多失效模式间的相关度及考虑失效相关时的整体失效概率。最后，以某系统的传动齿轮为例，比较了所提方法、均值一次二阶矩（Mean Value First Order Second Moment

MVFOSM）法、改进一次二阶矩（Advanced First Order Second Moment

AFOSM）法和传统高阶矩标准化技术（High-Order Moment Standardization Technique

HOMST）法的计算效果。结果显示，所提方法在精度和效率上都得到了较大的提升，提供了一种分析多失效模式可靠性的理论方法。

Abstract

Gear is the most commonly used transmission component

and its most common failure mode is tooth surface pitting and tooth root fracture. In order to analyze its reliability quickly and accurately

an improved fourth moment method considering failure correlation was proposed. Firstly

according to the failure mechanism

the reliability models of tooth contact fatigue and tooth root bending fracture failure were established respectively. Secondly

in order to improve the accuracy of the traditional fourth order moment solution

the second order reliability index obtained by the improved first order second moment method was used to obtain the new fourth order reliability index

so as to improve the reliability solution accuracy of single failure mode. Then

the correlation between multiple failure modes and the overall failure probability considering failure correlation were calculated based on the conditional probability dimension reduction method. Finally

taking the transmission gear of a system a a example

the calculation results of the proposed method

mean value first order second moment (MVFOSM) method

advanced first order second moment (AFOSM) method and traditional high-order moment standardization technique (HOMST) method were compared. The results show that the accuracy and efficiency of the proposed method are greatly improved

and it also provides a theoretical method to analyze the reliability of multiple failure modes.

关键词

齿轮四阶矩多失效模式可靠性

Keywords

GearFourth order momentMultiple failure modesReliability

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