点焊结构在随机振动环境下的疲劳寿命研究

黄军; 王瑞杰; 毛志亮

doi:10.13433/j.cnki.1003-8728.2017.1207

点焊结构在随机振动环境下的疲劳寿命研究

doi: 10.13433/j.cnki.1003-8728.2017.1207

1.
昆明理工大学机电工程学院, 昆明 650093

详细信息

作者简介:
黄军(1989-),硕士研究生,研究方向为机械结构强度及现代设计理论与方法,hai710@126.com

通讯作者:
王瑞杰(联系人),副教授,博士,硕士生导师,wrj001139@163.com

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- 被引次数: 0
出版历程
- 收稿日期: 2016-08-31
- 刊出日期: 2017-12-15

Studying Fatigue Life of Spot Welded Structure Under Random Vibration Environment

1.
Faculty of Mechanical and Electrical Engineering, Kunming University of Science and Technology, Kunming 650093, China

摘要

摘要: 在叙述振动疲劳寿命频域法中的Dirlik方法的基础上，根据模态试验修正有限元模型，采用有限元方法对点焊结构进行随机振动疲劳寿命预测。分析了不同PSD谱型对随机振动疲劳寿命的影响。结果表明：同一振动量级下，处于第1阶固有频率段的PSD幅值增加，随机振动疲劳寿命呈现明显下降趋势；在白噪声加速度功率谱作用下，功率谱密度幅值保持不变的条件下，随着带宽的增加，随机振动寿命呈现减小趋势，第1阶模态频率与第2阶模态频率间的非共振区频率段对随机振动疲劳寿命的影响是不可忽略。
- Dirlik方法 /
- 点焊 /
- 有限元法 /
- 随机振动疲劳寿命 /
- PSD谱型
Abstract: Based on the Dirlik method for vibration fatigue life study in the frequency domain, the finite element model is established and modified according to the model test, and the finite element method is used to predict the fatigue life of the spot welded structure. The effects of different PSD spectral types on the fatigue life under the random vibration environment are analyzed. The analysis results show that with increasing PSD amplitude under the same vibration level in the first natural frequency domain, the fatigue life under random vibration decreases. Under the influence of white noise acceleration power spectrum and when the PSD amplitude was kept unchanged; with increasing bandwidth, the fatigue life under the random vibration environment decreases. The influence of random vibration on the fatigue life in the region of non-resonance frequency between the first and second modal frequencies should not be neglected.
- dirlik method /
- spot welded structure /
- finite element method /
- random vibration /
- fatigue life

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参考文献(16)

[1]	王瑞杰,尚德广.变幅载荷作用下点焊焊接接头的疲劳损伤[J].焊接学报,2007,28(9):1-4 Wang R J, Shang D G. Fatigue damage of spot welding under variable amplitude load[J]. Transactions of the China Welding Institution, 2007,28(9):1-4(in Chinese)
[2]	李承山,尚德广,王瑞杰,等.变幅加载下基于动态响应特性的点焊接头疲劳寿命预测[J]. 机械工程学报,2009,45(4):70-75 Li C S, Shang D G, Wang R J, et al. Fatigue life prediction based on dynamic response characteristics for spot-welded joints under variable amplitude loading[J]. Journal of Mechanical Engineering, 2009,45(4):70-75(in Chinese)
[3]	臧启山,袁金才.点焊接头在复杂载荷谱下的疲劳研究[J].焊接学报,1989,10(4):265-270 Zang Q S, Yuan J C. The fatigue behaviour of spot welded joints under complex spectrum loading[J]. Transactions of the China Welding Institution, 1989,10(4):265-270(in Chinese)
[4]	Haiba M, Barton D C, Brooks P C, et al. Review of life assessment techniques applied to dynamically loaded automotive components[J]. Computers & Structures, 2002,80(5-6):481-494
[5]	Halfpenny A. A frequency domain approach for fatigue life estimation from finite element analysis[J]. Key Engineering Materials, 1999,167-168:401-410
[6]	Zhao W W, Baker M J. On the probability density function of rainflow stress range for stationary Gaussian processes[J]. International Journal of Fatigue, 1992,14(2):121-135
[7]	Petrucci G, Zuccarello B. Fatigue life prediction under wide band random loading[J]. Fatigue & Fracture of Engineering Materials & Structures, 2004,27(12):1183-1195
[8]	Bendat J S. Probability functions for random responses prediction of peak, Fatigue Damage, and Catastrophic Failures[R]//NASA Contractor Report NASA CR-33. Washington, DC, USA:;ASA, 1964
[9]	Wirsching P H, Torng T Y, Martin W S. Advanced fatigue reliability analysis[J]. International Journal of Fatigue, 1991,13(5):389-394
[10]	Dirlik T. Application of computers in fatigue analysis[D]. Coventry:University of Warwick, 1985
[11]	Bouyssy V, Naboishikov S M, Rackwitz R. Comparison of analytical counting methods for Gaussian processes[J]. Structural Safety, 1993,12(1):35-57
[12]	Gao Z, Moan T. Frequency-domain fatigue analysis of wide-band stationary Gaussian processes using a trimodal spectral formulation[J]. International Journal of Fatigue, 2008,30(10-11):1944-1955
[13]	王瑞杰.基于动态响应分析的点焊接头疲劳损伤与寿命预测[D].北京:北京工业大学,2008 Wang R J. Fatigue damage and life prediction based on dynamic response analysis for spot-welded joints[D]. Beijing:Beijing University of Technology, 2008(in Chinese)
[14]	李世龙,马立元,何佳,等.联合整体和局部模态信息钢管焊接结构模型修正[J].噪声与振动控制,2014,34(5):27-33 Li S L, Ma L Y, He J, et al. Model updating of steel-tube welded structures using global and local modal information[J]. Noise and Vibration Control, 2014,34(5):27-33(in Chinese)
[15]	袁爱民.基于灵敏度分析的有限元模型修正技术若干关键问题研究[D].南京:东南大学,2006 Yuan A M. Studies on several key problems of finite element model updating based on the sensitivity analysis[D]. Nanjing:Southeast University, 2006(in Chinese)
[16]	许成祥,贾善坡.储罐结构有限元动力模型修正及参数辨识研究[J].武汉理工大学学报,2010,32(9):286-290,308 Xu C X, Jia S P. Parameters identification and dynamic model updating for oil can[J]. Journal of Wuhan University of Technology, 2010,32(9):286-291,308(in Chinese)