| 动力学缩聚模型修正的矩阵逼近法 |
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| 引用本文： | 唐晓峰,王皓,唐国安.动力学缩聚模型修正的矩阵逼近法[J].上海航天,2007,24(5):10-13. |
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| 作者姓名： | 唐晓峰 王皓 唐国安 |
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| 作者单位： | 复旦大学,技术科学与工程学院,上海,200433 |
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| 基金项目： | 中国工程物理研究院基金 |
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| 摘 要： | 为避免结构动力学分析中修正有限元模型时的大型稠密矩阵运算,研究了一种用基于矩阵逼近的有限元缩聚模型修正法。根据有限元模型的缩聚和修正,给出了试验模态的扩阶、物理模态到广义模态的映射和矩阵逼近,并讨论了结构存在重频时模态的相关性。算例表明,该法可行。
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| 关 键 词： | 动力学分析 矩阵逼近 模型缩聚 模型修正 模态扩展 模态相关性 |
| 文章编号： | 1006-1630（2007）05-0010-04 |
| 收稿时间： | 2006-04-25 |
| 修稿时间： | 2006-11-10 |
Updating Dynamic Reduced Models Using Matrix Approximation Method |
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| TANG Xiao-feng,WANG Hao,TANG Guo-an.Updating Dynamic Reduced Models Using Matrix Approximation Method[J].Aerospace Shanghai,2007,24(5):10-13. |
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| Authors: | TANG Xiao-feng WANG Hao TANG Guo-an |
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| Abstract: | To avoid the computation of large denseness matrix in finite element model amending for structure's dynamics analysis,a modal updating of model reduction based on matrix approximation was studied in this paper.According to the model reduction and updating for finite element,the test modal expansion,the physical modal mapped with general modal and the matrix approximation were presented.The modal correlation was discussed when repeated normal frequencies were existed in the structure.The computation results showed that this method was feasible. |
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| Keywords: | Dynamics analysis Matrix approximation Model reduction Model updating Modal expansion Modal correlation |
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