000004538 001__ 4538
000004538 005__ 20141118192704.0
000004538 0177_ $$2doi$$a10.3850/978-981-07-2219-7_P258

000004538 0247_ $$210.3850/978-981-07-2219-7_P258
$$adoi
000004538 04107 $$aeng
000004538 046__ $$k2012-05-23
000004538 100__ $$aZhang, Feng-Liang
000004538 24500 $$aFast Bayesian Method for Assembling Mode Shapes

000004538 24630 $$n5.$$pProceedings of the 5th Asian-Pacific Symposium on Structural Reliability and its Applications
000004538 260__ $$bResearch Publishing, No:83 Genting Lane, #08-01, Genting Building, 349568 SINGAPORE
000004538 506__ $$arestricted
000004538 520__ $$2eng$$aModal identification aims at identifying the modal properties of a constructed structure using measured data, including the natural frequencies, damping ratios and mode shapes. It is among the first few steps to establish the baseline properties of the subject structure. In full-scale ambient vibration tests, many situations exist where it is required to obtain a detailed mode shape of a structure with a limited number of sensors. A common feasible strategy is to perform multiple setups with each one covering different parts of the structure while sharing some reference degrees of freedom (dofs) in common. This paper presents a fast Bayesian method for modal identification that can incorporate the FFT information in different setups consistent with probability logic. The method allows the global mode shape to be determined taking into account the quality of data in different setups. A fast iterative algorithm is developed that allows practical implementation even for a large number of dofs and setups. The method is illustrated with full-scale field testing of a pedestrian bridge where a global mode shape with a large number of measured locations is identified. Figures 1-3 show the assembled mode shapes using proposed method.

000004538 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000004538 653__ $$aAmbient vibration, Field test, Assemble mode shape, Bayes' theorem, Modal identification, Footbridge.

000004538 7112_ $$a5th Asian-Pacific Symposium on Structural Reliability and its Applications$$cSingapore (SG)$$d2012-05-23 / 2012-05-25$$gAPSSRA2012
000004538 720__ $$aZhang, Feng-Liang$$iAu, Ivan Siu-Kui
000004538 8560_ $$ffischerc@itam.cas.cz
000004538 8564_ $$s413567$$uhttp://invenio.itam.cas.cz/record/4538/files/P258.pdf$$yOriginal version of the author's contribution as presented on CD, .
000004538 962__ $$r4180
000004538 980__ $$aPAPER