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Operational Modal Parameter Identification from Power Spectrum Density Transmissibility

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WOS被引频次:59
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成果类型:
期刊论文
作者:
Yan, Wang-Ji;Ren, Wei-Xin*
通讯作者:
Ren, Wei-Xin
作者机构:
[Ren, Wei-Xin; Yan, Wang-Ji] Cent S Univ, Dept Civil Engn, Changsha 410075, Hunan, Peoples R China.
通讯机构:
[Ren, Wei-Xin] Cent S Univ, Dept Civil Engn, Changsha 410075, Hunan, Peoples R China.
语种:
英文
期刊:
Computer‐Aided Civil and Infrastructure Engineering
ISSN:
1467-8667
年:
2012
卷:
27
期:
3
页码:
202-217
文献类别:
WOS:Article;EI:Journal article (JA)
所属学科:
ESI学科类别:工程学;WOS学科类别:Computer Science, Interdisciplinary Applications;Construction & Building Technology;Engineering, Civil;Transportation Science & Technology
入藏号:
WOS:000299929700004;EI:20120714766124
基金类别:
Natural Science Foundation of China [50878210, 51078357]
机构署名:
本校为第一且通讯机构
院系归属:
土木工程学院
摘要:
Abstract:  Operational modal analysis subjected to ambient or natural excitation under operational conditions has recently drawn great attention. In this article, the power spectrum density transmissibility (PSDT) is proposed to extract the operational modal parameters of a structure. It is proven that the PSDT is independent of the applied excitations and transferring outputs at the system poles. As a result, the modal frequencies and mode shapes can be extracted by combing the PSDTs with different transferring outputs instead of different load conditions where the outputs from only one load condition are needed. A five‐story shear building subjected to a set of uncorrelated forces at different floors is adopted to verify the property of PSDTs and illustrate the accuracy of the proposed method. Furthermore, a concrete‐filled steel tubular half‐through arch bridge tested in the field under operational conditions is used as a real case study. The identification results obtained from currently developed method have been compared with those extracted from peak‐picking method, stochastic subspace identification, and finite element analysis. It is demonstrated that the operational modal parameters identified by the current technique agree well with other independent methods. The real application to the field operational vibration measurements of a full‐sized bridge has shown that the proposed PSDTs are capable of identifying the operational modal parameters (natural frequencies and mode shapes) of a structure.
参考文献:
Adewuyi AP, 2011, COMPUT-AIDED CIV INF, V26, P154, DOI 10.1111/j.1467-8667.2010.00682.x
Andersen P., 1996, P IMAC, P518
Bendat J. S., 1993, ENG APPL CORRELATION
BENDAT JS, 1996, RANDOM DATA ANAL MEA
Brincker R, 2001, SMART MATER STRUCT, V10, P441, DOI 10.1088/0964-1726/10/3/303

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