000013677 001__ 13677
000013677 005__ 20161114170127.0
000013677 04107 $$aeng
000013677 046__ $$k2011-05-25
000013677 100__ $$aFeng, Z.
000013677 24500 $$aBayesian Spectral Decomposition Method for Operational Modal Identification in Wireless Sensor Network

000013677 24630 $$n3.$$pComputational Methods in Structural Dynamics and Earhquake Engineering
000013677 260__ $$bNational Technical University of Athens, 2011
000013677 506__ $$arestricted
000013677 520__ $$2eng$$aStructural health monitoring (SHM) employing wireless sensor networks (WSN) is becoming increasingly popular in recent years. A Bayesian spectral decomposition (BSD) method employing a distributed computing strategy is presented for structural modal identification in WSN using output-only response data. This method uses the statistical properties of the largest eigenvalue of the output spectral matrix to obtain not only the optimal values of the updated modal frequencies and damping ratios but also their associated uncertainties by calculating the posterior joint probability distribution of these parameters. Mode shapes are obtained by singular value decomposition (SVD) of the output spectral matrix at corresponding discrete frequencies closest to their optimal values. This method identifies each mode, the modal frequency and damping ratio and the mode shape separately, which takes advantage of variable separation and can distribute the computational effort to several computational units, thus becoming suitable for implementation in wireless sensor network that provides such distributed computing environment. In addition, energy is conserved through the use of a novel distributed computing strategy. The efficacy and efficiency of the proposed methodology is demonstrated using numerical simulations.

000013677 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000013677 653__ $$aBayesian, Operational Modal Identification, Wireless Sensor Network, Spectral Decomposition.

000013677 7112_ $$aCOMPDYN 2011 - 3rd International Thematic Conference$$cIsland of Corfu (GR)$$d2011-05-25 / 2011-05-28$$gCOMPDYN2011
000013677 720__ $$aFeng, Z.$$iKatafygiotis, L.
000013677 8560_ $$ffischerc@itam.cas.cz
000013677 8564_ $$s278830$$uhttps://invenio.itam.cas.cz/record/13677/files/491.pdf$$yOriginal version of the author's contribution as presented on CD, section: MS 12 Identification Methods in Structural Dynamics.
000013677 962__ $$r13401
000013677 980__ $$aPAPER