| 应用位移频响函数进行模型修正 |
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| 引用本文： | 朱凼凼,冯咬齐.应用位移频响函数进行模型修正[J].宇航学报,2006,27(2):201-204. |
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| 作者姓名： | 朱凼凼 冯咬齐 |
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| 作者单位： | 1. 中国空间技术研究院研究发展部,北京,100094
2. 中国空间技术研究院总装与环境工程部,北京,100029 |
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| 摘 要： | 应用相关性分析后试验测量所得的位移频响函数对动力学分析模型的刚度矩阵、质量矩阵、阻尼系数进行修正,使修正后分析模型的频响函数与试验测量所得的相一致.该法不仅修正了动力学分析模型频响函数的峰值响应,还很好地修正了分析模型的固有频率,使得修正后模型峰值响应处的频率与试验测量所得的峰值响应处的频率相一致.该法具有明确的物理意义,数值算例表明,此法方便可行,修正结果精确,工程实际意义较强.
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| 关 键 词： | 动力学 位移 频响函数 模型修正 |
| 文章编号： | 1000-1328（2006）02-0201-04 |
| 收稿时间： | 04 21 2004 12:00AM |
| 修稿时间： | 2004-04-212005-09-05 |
Application Research of Finite Element Model Improvement Method by Use of Displacement Frequency Response Functions |
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| ZHU Dang-dang,FENG Yao-qi.Application Research of Finite Element Model Improvement Method by Use of Displacement Frequency Response Functions[J].Journal of Astronautics,2006,27(2):201-204. |
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| Authors: | ZHU Dang-dang FENG Yao-qi |
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| Institution: | 1. Department of research and development of CAST, Beijing 100094, China 2. Department of assembly and environment engineering of CAST, Beijing 100029, China |
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| Abstract: | By use of the displacement frequency response functions extracted from vibration test data,this paper updates dynamic characteristics of analytical model such as stiffness matrix,mass matrix and damp matrix to make the displacement frequency response functions coincide with those measured.This method not only improves analytical model's displacement frequency response functions,but also updates its natural frequency to meet those accurate.The method has definite physical meaning,and numerical example indicates that the method is handy and the results are accurate,which is fit for solving some practical problems. |
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| Keywords: | Dynamic Displacement Frequency response function Model improvement |
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