Simulation of Load Time History of Spindle Nose and Fatigue Life Prediction for Rear Torsion Beam

doi:10.7652/xjtuxb201309018

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Simulation of Load Time History of Spindle Nose and Fatigue Life Prediction for Rear Torsion Beam

更新时间：2025-07-09

- Simulation of Load Time History of Spindle Nose and Fatigue Life Prediction for Rear Torsion Beam
- Vol. 47, Issue 9, Pages: 106-111(2013)
- 作者机构：
  
  1. 南昌大学机电工程学院,南昌,330031
  2. 清华大学汽车安全与节能国家重点实验室,北京,100084
- 作者简介：
- 基金信息：
- DOI：10.7652/xjtuxb201309018
  CLC： O463.1;U467
- Online First：10 September 2013，
  
  Published：2013
- 稿件说明：
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Simulation of Load Time History of Spindle Nose and Fatigue Life Prediction for Rear Torsion Beam[J]. 2013, 47(9): 106-111.
DOI：

Simulation of Load Time History of Spindle Nose and Fatigue Life Prediction for Rear Torsion Beam[J]. 2013, 47(9): 106-111. DOI： 10.7652/xjtuxb201309018.

摘要

为了更准确预测后悬架扭力梁疲劳寿命

对后扭力梁轴头载荷时间历程进行了动态仿真和试验验证。采用多体动态仿真软件ADAMS建立了虚拟样机模型

运用扫频技术得到系统的传递函数

以样车道路实测悬架弹簧垂向位移为参考

利用反求迭代法获得了轴头载荷的时间历程

并通过台架试验对其准确性进行验证

结合部件的S-N疲劳特性曲线

采用准静态法和Palmgren-Miner线性累计损伤法对后扭力梁结构的疲劳寿命进行了预测。结果表明

后扭力梁结构最低寿命为76.4周

而较低寿命区位于横梁中间固定垫片的焊点处

并与实际相符。通过获得的后扭力梁轴头的载荷信息

可以准确地预测结构疲劳寿命

对结构载荷的迭代仿真和寿命预测具有一定的工程应用价值。

Abstract

For revealing fatigue failure mechanism and accurately predicting fatigue life for rear torsion beam suspension of a car

load time history of a spindle nose is simulated and verified via dynamic analysis and test. The dynamic simulation model of rear torsion beam suspension is established with integrating multibody dynamic analysis software ADAMS. The system transfer function is solved by sweep frequency technique. Associating with the measured suspension spring displacements on a sample road

the load time history of spindle nose is acquired by dynamic iterative simulation and verified by bench test. Combining with the S-N of fatigue characteristic curve

the fatigue life of the rear torsion beam suspension is evaluated by quasi-static stress analysis and Palmgren-Miner linear cumulative rule. The minimum life is 76.4 cycles

which coincides with the real situation. Thus the load time history on spindle nose can be effectively acquired by dynamic simulation and finite element method

furthermore the structure fatigue life can be accurately predicted.

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references

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