| 基于系统响应的模态截断方法的研究 |
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| 引用本文： | 管红根,陈常顺,高树滋.基于系统响应的模态截断方法的研究[J].南京理工大学学报(自然科学版),2000,24(6):532-535. |
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| 作者姓名： | 管红根 陈常顺 高树滋 |
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| 作者单位： | 南京理工大学机械学院,南京,210094 |
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| 摘 要： | 该文以欧拉－伯努力梁为模型，推导出基于系统响应梁的模态截断准则，根据模态价值大小取舍模态，其结论可推广到大型复杂结构系统。该法考虑了可观性向量、模态增益、结构阻尼系数及模态频率，较简单地频率截断法是一个很大的改进，降价后的模能很好地近似原系统性能。文末给出了一个简支梁模态截断的例子。
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| 关 键 词： | 动力学 柔性多体系统 模态综合法 系统响应 模态截断法 |
| 修稿时间： | 2000年5月10日 |
A Solution for Modal Reduction Criterion Based on the System Response |
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| Hou Jian.A Solution for Modal Reduction Criterion Based on the System Response[J].Journal of Nanjing University of Science and Technology(Nature Science),2000,24(6):532-535. |
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| Authors: | Hou Jian |
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| Abstract: | In this paper, modal reduction criterion is derived based on the system response taking as the model of Euler Bernoulli beam, editing modal according to the value of modal costs. The conclusion can be used in a large flexible complex structure system. It is a more preferable to simpler frequency criterion, since it takes into account of frequency, vibration mode, damping, sensor and actuator information. Reduced order model can approximate well the basic characteristics of the original system. An example of editing modal for simply supported beam is illustrated in the end of the paper. |
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| Keywords: | dynamics flexible multibody system modal synthesis method |
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