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Optimal sensor placement in health monitoring of suspension bridge

Science China(Technological Sciences) 2012年第7期55卷 2039-2047页

作者： LI BinBin LI DongSheng ZHAO XueFeng OU JinPing Faculty of lnfrastructure Engineering Dalian University of TechnologyDalian 116024China

Structural health monitoring(SHM) provides an effective approach to ensure the safety of ***,with the restriction of the cost of sensor system and data processing,only a small number of sensors could be available in the health monitoring system(HMS).In order to obtain the best identification of structural characteristics,optimal sensor placement(OSP) becomes an inevitable task in the design of *** paper introduces the process for determining the OSP in HMS of a suspension bridge,in which four different OSP methods have been investigated,including the effective independence(EI) method,the effective independence driving-point residue(EFI-DPR) method,the minimized modal assurance criterion(minMAC) method and the principal subset selection-based extended EI(PSS-EI) ***,three criteria,which are modal assurance matrix(MAC),condition number(CN) of mode shape matrix and determinant of Fisher information matrix(FIM),were employed to evaluate the effect of the OSP methods *** result showed that the PSS-EI method developed has the ability to guarantee the highest determinant of FIM,a relatively small off-diagonal term of MAC and agreeable CN,as well as the deployment of sensors in a uniform and symmetric fashion for the studied ***,the scheme obtained by PSS-EI was adopted in the HMS.

关键词： structural health monitoring optimal sensor placement fisher information matrix modal assurance criterion

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Seismic instrumentation of high-rise buildings

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Progress in Natural Science:Materials International 2009年第2期19卷 223-227页

作者： Katayoun B. Aafshar Dragi Dojcinovski Azad University Derakhty BoulevardGholestane1 Alley Institute of Earthquake Engineering and Engineering Seismology University “St. Cyril and Methodius”

An optimal assessment method for the design of accelerograph arrays to monitor the seismic response of high-rise buildings is pre-sented. This method uses a finite element model of the structure based on a simplified multi-degree-of-freedom system model defined using the parameter identification method. The off-diagonal element of the modal assurance criterion (MAC) matrix of mode is taken as the target function in order to facilitate the selection of optimum locations. An example for a high-rise building in Dalian indicates that a minimum of 15 locations provide the optimum sites for monitoring the dynamic response of the selected building in view of eco-nomic benefit.

关键词： Accelerograph High-rise building Optimal location modal assurance criterion

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