| 振动系统动力修改的近频耦合模态子空间摄动法 |
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| 引用本文： | 孙久厚,朱德懋.振动系统动力修改的近频耦合模态子空间摄动法[J].航空学报,1992,13(1):23-28. |
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| 作者姓名： | 孙久厚 朱德懋 |
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| 作者单位： | 南京航空学院振动研究所 南京 210016 |
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| 摘 要： | 本文给出了对振动系统作小修改的一种近频耦合模态子空间摄动法。算例表明这种算法简单、精度高,算法可行。
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| 关 键 词： | 结构动力学 振动分析方法 摄动法 小参数法 |
| 收稿时间： | 1990-08-01 |
| 修稿时间： | 1991-04-17 |
COUPLED-MODE SUBSPACE PERTURBATION METHOD FOR STRUCTURE DYNAMIC MODIFICATION |
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| Sun Jiu-hou,Zhu De-mao.COUPLED-MODE SUBSPACE PERTURBATION METHOD FOR STRUCTURE DYNAMIC MODIFICATION[J].Acta Aeronautica et Astronautica Sinica,1992,13(1):23-28. |
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| Authors: | Sun Jiu-hou Zhu De-mao |
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| Institution: | Vibrative Institute of Nanjing Aeronautical Institute, Nanjing, 210016 |
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| Abstract: | A coupled-mode subspace perturbation method is presented in this paper. When the structural system has closed natural frequencies, the modes are coapled and the ordinary matrix perturbation method is invalid. By use of the initial modal coordinate transformation, the coupled-mode subspaca is defined. After the next subspace modal transformation, the coupled-mode subspace perturbation method gives the complete perturbed eigensolution. The sample problems demonstrat that the method presented here is accurate and efficient. |
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| Keywords: | structural dynamics vibration analysis method perturbation method small parameter method |
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