Local measurement for structural health monitoring

Localized nature of damage in structures requires local measurements for structural health monitoring. The local measurement means to measure the local, usually higher modes of the vibration in a structure. Three fundamental issues about the local measurement for structural health monitoring including (1) the necessity of making local measurement, (2) the difficulty of making local measurement and (3) how to make local measurement are addressed in this paper. The results from both the analysis and the tests show that the local measurement can successfully monitor the structural health status as long as the local modes are excited. Unfortunately, the results also illustrate that it is difficult to excite local modes in a structure.Therefore, in order to carry structural health monitoring into effect, we must (1) ensure that the local modes are excited, and (2) deploy enough sensors in a structure so that the local modes can be monitored.

作 者： G.Z.Qi Guo Xun Qi Xiaozhai W. Dong P.Chang   作者單位： G.Z.Qi(InfraTech, Inc. Silver Spring, Maryland, USA)

Guo Xun,Qi Xiaozhai(Instutute of Engineering Mechanics, CEA, Harbin, China)

W. Dong(Risk Management Solution, San Francisco, California, USA)

P.Chang(Department of Civil Engineering, University of Maryland/College Park, USA) 

刊 名： 地震工程與工程振動（英文版）  SCI 英文刊名： EARTHQUAKE ENGINEERING AND ENGINEERING VIBRATION  年，卷(期)： 2005 4(1)  分類號： P315  關鍵詞： structure health monitoring   local measurement   local modes   higher modes   local modes   excitation   sensors   structural vibration  

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