| 从自由试验提取阻尼约束结构主模态 |
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| 引用本文： | 张德文.从自由试验提取阻尼约束结构主模态[J].强度与环境,2006,33(2):23-32,38. |
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| 作者姓名： | 张德文 |
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| 作者单位： | 北京强度环境研究所,北京,100076 |
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| 摘 要： | 本文发展了一种利用自由试验提取阻尼约束结构复模态的可行方法。然后利用现有技术，又由提取的复模态辨识出工程中常用的主模态。本文采用了两种阻尼模型：瑞利阻尼和粘性阻尼。针对此两阻尼模型建立的提取约束结构复模态的两支配特征方程的精度是良好的。即使当所要求提取的约束结构模态的频率范围大于自由结构的试验频段，也能获得满意的结果。
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| 关 键 词： | 自由-自由模态试验 阻尼 变换 |
| 文章编号： | 1006-3919（2006）02-0023-10 |
| 收稿时间： | 2005-09-06 |
| 修稿时间： | 2005-09-062005-09-06 |
Extraction of normal eigenmodes for damping constrained structure from free test data |
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| ZHANG De-wen.Extraction of normal eigenmodes for damping constrained structure from free test data[J].Structure & Environment Engineering,2006,33(2):23-32,38. |
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| Authors: | ZHANG De-wen |
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| Institution: | Beijing Institute of Structure and Environment Engineering, Beijing 100076, China |
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| Abstract: | Extraction of constrained structural eigenmodes from free test data was addressed by many scholars, but the effect of structural damping frequently is not taken into account. For this reason, the author develops a technique for extracting constrained structural complex modes from damping free structural test in this paper. Then for application of engineering, the normal eigenmodes of constrained structure are identified based on the complex modes. Numerical simulation example shows that developed method is feasible and efficient. |
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| Keywords: | free-free modal test damping transformation |
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