Stress response of the thin-walled structures subject to thermo-acoustic loadings has a great effect on the fatigue life prediction.This paper introduces the Von Karman large deflection equation for thin-walled structures subject to thermo-acoustic loading.The stress response of simply-supported aluminum alloy thin-walled plate and stiffened plate under the same SPL and different temperatures is also calculated by FEM.The time history, PDF, PSD of stress are obtained.The fatigue life of the structures is estimated and analyzed by the rain flow cycle counting scheme with the Miner accumulative damage theory and Smith-Watson-Topper(SWT)average stress model.
ZHONG Hao-jie, SHA Yun-dong, WEI Jing
. Random fatigue life prediction of stiffened plates under thermo-acoustic loadings[J]. Journal of Shenyang Aerospace University, 2014
, 31(1)
: 6
-11
.
DOI: 10.3969/j.issn.2095-1248.2014.01.002
[1]沙云东, 闻邦椿, 屈伸.薄壁板在随机声载荷作用下的振动响应谱估算[J].振动与冲击, 2007, 26(6):63-66.
[2]Yun Dong Sha, Jing Wei, Zhijun Gao.Nonlinear response and fatigue life prediction of thin-walled structures under thermo-acoustic loadings[J].Applied Mechanics and Materials, 2012, 157-158:1204-1211.
[3]沙云东, 闻邦椿, 屈伸, 等.航空薄壁结构在随机噪声载荷作用下的振动响应研究[J].机械制造, 2006, 45(509):23-26.
[4]Przekop A, Rizzi S A, Sweitzer K A.An investigation of high-cycle fatigue models for metallic structures exhibiting snap-through response[J].International Journal of Fatigue, 2008, 30(9):1579-1598.
[5]Mei C.Nonlinear random response of composite panels in an elevated thermal environment[R].Old Dominion University, Norfolk, VA, 2000.
[6]赵亚凡, 宋明大.随机载荷下疲劳寿命估算的简便方法[J].机械设计, 2003, 20(8):53-54.
[7]徐绯, 肖寿庭.结构声疲劳寿命估算的攻略谱密度法[J].机械强度学报, 1996, 12(18):38-42.
[8]张春月, 沙云东, 王英.航空薄壁板结构高温声疲劳分析[J].航空发动机, 2008, 34(2):22-26.
[9]李纪永, 沙云东, 唐金, 等.声载荷作用下高温薄壁结构响应特性分析[J].沈阳航空工业学院学报, 2010, 27(5):23-28.
[10]高志军.薄壁结构在热声载荷下的动态响应及疲劳寿命预测[D].沈阳:沈阳航空航天大学, 2011.
[11]张涛, 刘土光, 周晶晶, 等.受面内冲击载荷下加筋板的非线性动态屈曲[J].固体力学学报, 2003, 24(4):391-398.
[12]郭小鹏.高温合金薄壁结构随机声疲劳分析技术研究[D].沈阳:沈阳航空航天大学, 2010.
