| 某结构件的随机振动疲劳分析 |
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| 引用本文： | 刘龙涛,李传日 程祺 乔亮. 某结构件的随机振动疲劳分析[J]. 振动与冲击, 2013, 32(21): 97-101 |
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| 作者姓名： | 刘龙涛 李传日 程祺 乔亮 |
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| 作者单位： | 1.中国航天科技集团公司第八研究院，上海 201109；2.北京航空航天大学可靠性与系统工程学院，北京 100191；3.中国人民解放军驻二二一厂军代表室，太原030000 |
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| 摘 要： | 为了对某机载产品进行结构疲劳分析，采用有限元分析软件ANSYS对产品结构进行了模态分析和随机振动分析。结合模态试验修正了有限元模型，由随机振动分析得到应力响应功率谱，最后利用频域方法计算结构的疲劳损伤。仿真结果基本吻合强化试验结果，并给出了产品结构设计改进方案。
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| 关 键 词： | 有限元分析 疲劳损伤 频域法 |
| 收稿时间： | 2012-09-04 |
| 修稿时间： | 2012-11-23 |
Random vibration structure fatigue analysis |
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| Liu Longtao Li Chuanri Cheng Qi Qiao Liang. Random vibration structure fatigue analysis[J]. Journal of Vibration and Shock, 2013, 32(21): 97-101 |
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| Authors: | Liu Longtao Li Chuanri Cheng Qi Qiao Liang |
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| Affiliation: | 1.China Aerospace Science and Technology Corporation 8th academy, Shanghai 201109，China；2.School of Reliability and System Engineering, Beihang University , Beijing 100191，China；3.The Chinese People’s Liberation Army Representative Office in 221 Factory, Taiyuan 030000，China |
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| Abstract: | It is that the modal analysis and random vibration analysis are conducted for the product by using the finite element analysis software ANSYS for the analysis of the fatigue of the airborne product structure. Compared with the modal analyzing results, the finite element model is corrected. The stress response power spectral density is obtained from random vibration analyzing. The fatigue damage of the structure is calculated by the frequency domain method. And the simulation results are in agreement with the reliability enhancement testing results. An optimization scheme for the product structure design is given. |
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| Keywords: | Finite element analysis Fatigue damage Frequency domain method |
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