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| A quick method for analyzing dynamic responses of axisymmetric structures under lateral impulsive loadings |
| Received:May 04, 2008 |
| View Full Text View/Add Comment Download reader |
| DOI：10.7511/jslx20103031 |
| KeyWord:lateral impact axisymmetric structure dynamic response finite element method principle of superposition |
| Author | Institution |
| 毛勇建 |
西北工业大学 航空学院,西安 ;中国工程物理研究院 总体工程研究所,绵阳 |
| 李玉龙 |
西北工业大学 航空学院,西安 |
| 邓宏见 |
中国工程物理研究院 总体工程研究所,绵阳 |
| 黄含军 |
中国工程物理研究院 总体工程研究所,绵阳 |
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| Abstract: |
| Dynamic responses of axisymmetric structures under lateral impulsive loadings are often analyzed by analytical／semi-analytical methods or direct finite element simulations. But sometimes, all those methods have disadvantages or limitations such as complexity, high computational cost, etc. This paper proposes a quick method to solve this kind of problems based on finite element analysis and superposition principle of linear dynamics. In this method, firstly, the impulsive loading is discretized into finite loading elements by generating lines of the body of rotation. Secondly, the structural responses induced by a unique loading element are calculated by finite element method. Thirdly, by coordinate rotation and linear superposition, the responses under various lateral loadings with complicated distributions are obtained from the responses under the unique loading element. In the end, examples are given to show the validity and features of high efficiency, convenience and flexibility of this method. |
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