航空宇航工程

薄壁结构在热声环境中随机疲劳寿命的估算

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  • 沈阳航空航天大学 航空航天工程学部, 沈阳 110136
蒋娜娜(1985-), 女, 河北沧州人, 硕士研究生, 主要研究方向:飞行器动力学环境控制与控制技术研究, E-mail: 82017050@qq.com; 沙云东(1966-), 男, 黑龙江阿城人, 教授, 主要研究方向:发动机强度、振动及噪声, E-mail: ydsha2003@vip.sina.com。

收稿日期: 2012-12-01

Fatigue life prediction of thin-walled structure under thermo-acoustic loadings

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  • Faculty of Aerospace Engineering, Shenyang Aerospace University, Shenyang 110136

Received date: 2012-12-01

摘要

高超飞行器在热声载荷作用下结构的疲劳破坏问题日益严峻, 通过应用雨流计数法, 基于Miner线性累积损伤理论估算结构的疲劳寿命。以四边简支的薄壁铝合金结构为模型, 计算了在160dB声压级、不同温度时结构的非线性动态响应, 并且估算了相应载荷情况下结构的疲劳寿命。结果表明, 在压级载荷不变情况下, 随着温度的增加, 结构的疲劳寿命呈现先降低再升高的趋势, 并且在跳变时, 疲劳寿命降至最低。

本文引用格式

蒋娜娜, 魏静, 鲍冬冬, 沙云东 . 薄壁结构在热声环境中随机疲劳寿命的估算[J]. 沈阳航空航天大学学报, 2013 , 30(1) : 15 -19 . DOI: 10.3969/j.issn.2095-1248.2013.01.004

Abstract

The fatigue failure problem of hypersonic vehicle structures under thermal-acoustic loadings has become increasingly serious. This paper utilizes the rain flow cycle counting scheme and the Miner accumulative damage model to predict the fatigue life of thin-walled structure. Taking the aluminum plate with clamping as the object , this paper calculates the nonlinear random response of thin-walled structure at various combinations of 160dB and different temperatures, and predicts the appropriate fatigue life under the corresponding loading conditions. Results show that in the same sound pressure level loading, the fatigue life reduces first and then grows with the increase of temperature, and it drops to the lowest when the structure enters snap-through regime.

参考文献

[1]吴振强, 任芳, 张伟.飞行器结构热噪声试验的研究进展[J].导弹与航天运载技术, 2010(2):24-30.
[2]Charles C.Gray.Chuh Mei.Finite element analysis of thermal post-buckling and vibrations of thermally buckled composite[J].2008(30):188-190.
[3] Sha Y D, Li J Y, Gao Z J.Dynamic response of pre/post buckled thin-walled structure under thermo-acoustic Loading[J].Applied Mechanics and Materials, 2011(80-81):536-541.
[4] Sha Y D, Gao Z J, Xu F, et al.Influence of thermal loading on the dynamic response of thin-walled structure under thermo-acoustic loading[J].Applied Mechanics and Materials, 2011(2-3):876-881.
[5]Sha Y D, Wei J, Gao Z J.Nonlinear response and fatigue life prediction of thin-walled structures under thermo-acoustic loadings[J].Applied Mechanics and Materials, 2012(157-158):1204-1211.
[6]Yung-Li Lee Jwo Pan, R.B.Hathaway, M.E.Barkey.疲劳试验测试分析理论与实践[M].张然治, 译.北京:国防工业出版社, 2011.
[7]郭小鹏, 沙云东, 张军.基于雨流计数法的随机声疲劳寿命估算方法研究[J].沈阳航空工业学院学报, 2009, 26(3):10-14.
[8]K.A.Sweitzer, N.Ferguson.Mean stress effects on random fatigue of nonlinear structures[C].Lisbon, international congress on sound and vibration, 2005(12):62-68.
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