| 含裂纹悬臂梁的振动与疲劳耦合分析 |
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| 引用本文： | 刘文光,陈国平.含裂纹悬臂梁的振动与疲劳耦合分析[J].振动与冲击,2011,30(5):140-144. |
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| 作者姓名： | 刘文光 陈国平 |
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| 作者单位： | 1.南京航空航天大学 航空宇航学院，南京 210016；2.南昌航空大学 航空制造工程学院，南昌 330063 |
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| 摘 要： | 基于Paris方程和同步分析方法考虑振动与疲劳裂纹扩展耦合之影响,提出一种含裂纹梁的振动疲劳寿命分析思路.振动分析过程中,利用线性弹簧等效裂纹段,复弹性模量引入阻尼损耗因子,得到考虑裂纹扩展、激励频率和阻尼等因素影响的动应力响应.结果表明:裂纹扩展、激励频率和阻尼等因素对疲劳寿命具有重要的影响.通过振动分析与疲劳裂纹扩展寿命估算同步进行,可进一步提高疲劳寿命估算精度.
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| 关 键 词： | 振动疲劳 分段分析 裂纹扩展 裂纹悬臂梁参考文献 |
| 收稿时间： | 2009-12-2 |
| 修稿时间： | 2010-3-22 |
Coupling analysis for vibration and fatigue of a cracked cantilever beam |
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| LIU Wen-guang,CHEN Guo ping.Coupling analysis for vibration and fatigue of a cracked cantilever beam[J].Journal of Vibration and Shock,2011,30(5):140-144. |
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| Authors: | LIU Wen-guang CHEN Guo ping |
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| Affiliation: | (1. College of Aerospace Engineering, Nanjing University of Aeronautics and Astronautics Nanjing 20016，China；2.School of Aeronautical Manufacturing Engineering, Nanchang Hangkong University Nanchang 330063，China) |
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| Abstract: | An analytical method about vibration and fatigue of a cracked cantilever beam was proposed based on timing analysis and Paris equation.Coupling relationship between vibration and fatigue crack growth was considered by using timing analysis methods.Crack part was replaced with a linear spring and damping loss factor was introduced with complex elastic modulus during vibration analysis.So crack growth,excitation frequency and damping were considered in vibration analysis.Results indicated that crack length,ex... |
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| Keywords: | vibration and fatigue piecewise analysis crack propagation cracked cantilever beam |
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