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.
JIANG Na-na, WEI Jing, BAO Dong-dong, SHA Yun-dong
. Fatigue life prediction of thin-walled structure under thermo-acoustic loadings[J]. Journal of Shenyang Aerospace University, 2013
, 30(1)
: 15
-19
.
DOI: 10.3969/j.issn.2095-1248.2013.01.004
[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.
