| 鸟体撞击结构过程的相似律研究(英文) |
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| 引用本文： | Li Yulong*,Zhang Yongkang,Xue Pu School of Aeronautics,Northwestern Polytechnical University,Xi’an ,China.鸟体撞击结构过程的相似律研究(英文)[J].中国航空学报,2008,21(6):512-517. |
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| 作者姓名： | Li Yulong* Zhang Yongkang Xue Pu School of Aeronautics Northwestern Polytechnical University Xi’an China |
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| 作者单位： | 西北工业大学航空学院 |
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| 基金项目： | Foundation item： Civil Aviation Special Foundation （N6BM0001） |
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| 摘 要： | With dimensional analysis and similarity theory, the model similarity law of aircraft structures trader bird impact load is investigated. Numerical calculations by means of nonlinear dynamic software ANSYS/LS-DYNA are conducted on the finite element models constructed with different scaling factors. The influence of strain rate on the model similarity law is found to be dependent on the strain rate sensitivity of materials and scale factors. Specifically, materials that are not sensitive to strain rate obey the model similarity law in the bird impact process. The conclusions obtained are supposed to provide a theoretical basis for the experimental work of bird impact on aircraft structure.
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| 关 键 词： | 空间分析 相似性定律 鸟撞击 疲劳率 有限元分析 |
| 收稿时间： | 29 January 2008 |
Study of Similarity Law for Bird Impact on Structure |
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| Li Yulong,Zhang Yongkang,Xue Pu.Study of Similarity Law for Bird Impact on Structure[J].Chinese Journal of Aeronautics,2008,21(6):512-517. |
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| Authors: | Li Yulong Zhang Yongkang Xue Pu |
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| Institution: | aSchool of Aeronautics, Northwestern Polytechnical University, Xi'an 710072, China |
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| Abstract: | With dimensional analysis and similarity theory,the model similarity law of aircraft structures under bird impact load is investi-gated.Numerical calculations by means of nonlinear dynamic software ANSYS/LS-DYNA are conducted on the finite element models constructed with different scaling factors.The influence of strain rate on the model similarity law is found to be dependent on the strain rate sensitivity of materials and scale factors.Specifically,materials that are not sensitive to strain rate obey the model similarity law in the bird impact process.The conclusions obtained are supposed to provide a theoretical basis for the experimental work of bird impact on aircraft structure. |
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| Keywords: | dimensional analysis similarity law bird impact strain rate finite element analysis |
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