| 一种基于互功率谱密度的频域模态识别法 |
| |
| 引用本文： | 申凡,郑敏,史东锋,鲍明. 一种基于互功率谱密度的频域模态识别法[J]. 振动工程学报, 2001, 14(3): 259-262 |
| |
| 作者姓名： | 申凡 郑敏 史东锋 鲍明 |
| |
| 作者单位： | 1. 南京航空航天大学振动工程研究所
2. 南京理工大学制造工程学院 |
| |
| 基金项目： | 航空工业总公司九五规划资助项目(编号:62.2.21) |
| |
| 摘 要： | 对各测点响应的互功率谱密度函数进行了详细推导，提出了一种基于互功率谱密度的频域多参点辨识法，这意味着许多利用频响函数的传统频域识别法可以很容易地用于工作状态下的模态识别，大大开阔了未知激励下模态识别的视野。然后采用一飞机模型对该方法进行了试验验证，结果表明，本文所提出的方法确实可行。
|
| 关 键 词： | 互功率谱密度 频响函数 模态识别 未知激励 飞机模型 |
| 修稿时间： | 2000-05-12 |
Modal Parameter Identification Using Cross-Power Spectra Density |
| |
| Shen Fan Zheng Min Shi Dongfeng Bao Ming. Modal Parameter Identification Using Cross-Power Spectra Density[J]. Journal of Vibration Engineering, 2001, 14(3): 259-262 |
| |
| Authors: | Shen Fan Zheng Min Shi Dongfeng Bao Ming |
| |
| Affiliation: | Shen Fan 1 Zheng Min 2 Shi Dongfeng 1 Bao Ming 1 |
| |
| Abstract: | Only respones can be used to extract modal parameters under operating conditions. In the situation where it is very difficult to measure excitation. Very few methods are available in frequency domain on this issue. A method of cross power spectral density between responses is derived and a poly reference modal analysis method using cross power spectral density method in frequency domain is presented in this paper. The method developed in this paper makes it easy to extract modal parameters under operating conditions. Then an experiment on an aircaft model is performed in order to verify the proposed method in this paper. The results demonstrate that it is feasible. |
| |
| Keywords: | cross power spectral density frequency response function modal analysis unknown excitation |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ |
