Time-Dependent Reliability Evaluation Method of Harmonic Drive with Transient Finite Element and Accelerated Life Test

doi:10.7652/xjtuxb202004001

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Time-Dependent Reliability Evaluation Method of Harmonic Drive with Transient Finite Element and Accelerated Life Test

更新时间：2025-07-09

- Time-Dependent Reliability Evaluation Method of Harmonic Drive with Transient Finite Element and Accelerated Life Test
- Vol. 54, Issue 4, Pages: 1-9(2020)
- 作者机构：
  
  1. 西安交通大学陕西省智能机器人重点实验室,西安,710049
  2. 西安交通大学机械工程学院,西安,710049
- 作者简介：
- 基金信息：
- DOI：10.7652/xjtuxb202004001
  CLC： TH132.43
- Online First：10 April 2020，
  
  Published：2020
- 稿件说明：
移动端阅览
Time-Dependent Reliability Evaluation Method of Harmonic Drive with Transient Finite Element and Accelerated Life Test[J]. 2020, 54(4): 1-9.
DOI：

Time-Dependent Reliability Evaluation Method of Harmonic Drive with Transient Finite Element and Accelerated Life Test[J]. 2020, 54(4): 1-9. DOI： 10.7652/xjtuxb202004001.

摘要

为了准确预估谐波减速器疲劳失效寿命

提出了一种谐波减速器时变可靠度评估方法。首先

建立了考虑动态接触干涉的谐波减速器整机瞬态动力学有限元分析模型

解决了谐波减速器柔轮危险位置处动态应力的求解问题; 然后

进行谐波减速器加速寿命试验

结合寿命失效样本和最大似然估计

解决了强度退化参数的准确估计问题; 其次

提出了结合剩余强度模型、随机摄动法和Edgeworth级数的谐波减速器时变可靠度评估方法; 最后

以XB-60谐波减速器为算例

有限元分析和寿命失效样本均显示柔轮齿圈后端齿根处为应力集中的危险位置

与基于等效圆壳静应力或经验退化参数的可靠度评估方法相比

采用瞬态有限元及加速寿命试验的谐波减速器时变可靠度评估方法寿命预测误差最小

同时通过引入调整因子

提出的方法可应用至不同载荷下的谐波减速器时变可靠度评估。

Abstract

A time-dependent reliability evaluation method is proposed to predict the failure life of harmonic drive precisely. Considering the dynamic contact interference

a transient dynamic finite element model of harmonic drive is established to solve dynamic stress at the critical position of flexspline in harmonic drive. The accelerated life tests of harmonic drive are conducted

and degradation parameters are identified by failure life samples via maximum likelihood estimation. Combined with residual strength model

stochastic perturbation method and Edgeworth series

the time-dependent reliability evaluation method of harmonic drive is proposed. Taking the XB-60 harmonic drive as a case study

both finite element analysis and failure life samples show that the critical position of stress concentration is at the tooth root of rear section of gear ring in flexspline. Compared with the time-dependent reliability methods with equivalent circular-shell static stress or empirical degradation pa

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references

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