[1]杜秀丽,汪凤泉.非平稳随机激励下线性系统模态识别的小波方法[J].东南大学学报(自然科学版),2006,36(2):319-321.[doi:10.3969/j.issn.1001-0505.2006.02.029]
 Du Xiuli,Wang Fengquan.Method of modal identification based on wavelet transform in LTI system under non-stationary random excitation[J].Journal of Southeast University (Natural Science Edition),2006,36(2):319-321.[doi:10.3969/j.issn.1001-0505.2006.02.029]
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非平稳随机激励下线性系统模态识别的小波方法()
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《东南大学学报(自然科学版)》[ISSN:1001-0505/CN:32-1178/N]

卷:
36
期数:
2006年第2期
页码:
319-321
栏目:
机械工程
出版日期:
2006-03-20

文章信息/Info

Title:
Method of modal identification based on wavelet transform in LTI system under non-stationary random excitation
作者:
杜秀丽 汪凤泉
东南大学土木工程学院, 南京 210096
Author(s):
Du Xiuli Wang Fengquan
College of Civil Engineering, Southeast University, Nanjing 210096, China
关键词:
模态识别 小波变换 非平稳随机激励
Keywords:
modal identification wavelet transform non-stationary random excitation
分类号:
TH113.1;O324
DOI:
10.3969/j.issn.1001-0505.2006.02.029
摘要:
通过对非平稳随机激励下的线性时不变系统的响应x(t)进行小波变换.利用各级小波系数的正交性,对其中的某些平稳小波系数进行合成,得到满足结构动力学方程的新平稳信号y(b),用其代替原始的结构响应x(t),结合其他各种平稳随机激励下的模态识别的方法,进行非平稳随机激励下系统参数的识别.仿真结果表明,该方法可以在一定程度上消除非平稳随机激励所引起的响应信号的非平稳性.
Abstract:
Modal parameters’ identification of linear system to non-stationary random excitation has been a hot research topic in recent years. A new synthesis stationary signal y(b) based on wavelet transform of original response x(t) and wavelet coefficients’ orthogonality is presented in this paper. The new signal, which satisfies structural motion equation, instead of original response, is used in identifying the modal parameters of non-stationary linear system, combined with the method of modal identification under stationary random excitation. The numerical results show that the method can remove the non-stationary of output signal under non-stationary random excitation to a certain extent.

参考文献/References:

[1] Ueng J M,Lin C C,Lin P L.System identification of torsionally coupled buildings [J]. Computers and Structures,2000,74(6):667-686.
[2] Donoho D L.De-noising by soft-thresholding[J]. IEEE Transaction on Information Theory, 1995,41(3):613-627.
[3] 李中付,华宏星,宋汉文,等.非稳态环境激励下线性结构的模态参数辨识[J].振动工程学报,2002,15(2):139-143.
  Li Zhongfu,Hua Hongxin,Song Hanwen,et al.Modal parameters identification of linear structures undergoing non-stationary ambient excitation [J].Journal of Vibration Engineering,2002,15(2):139-143.(in Chinese)
[4] Xu X Z,Hua H X,Li Z F,et al.Identification of modal parameters with linear structure under non-stationary ambient excitation[J].Journal of Donghua University(English Edition),2004,21(1):146-151.
[5] Ventura C E,Liam F W D,Lord J F,et al.Dynamic characteristics of a base isolated building from ambient vibration measurements and low level earthquake shaking [J]. Soil Dynamics and Earthquake Engineering,2003,23(4):313-322.
[6] 姚志远.基于连续模型的大型结构模态参数识别[J].东南大学学报:自然科学版,2003,33(5):617-620.
  Yao Zhiyuan.Method of identification of a structural physical parameters based continuous time model [J].Journal of Southeast University:Natural Science Edition,2003,33(5):617-620.(in Chinese)

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备注/Memo

备注/Memo:
作者简介: 杜秀丽(1974—),女,博士生; 汪凤泉(联系人),男,教授,博士生导师.
更新日期/Last Update: 2006-03-20