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Mathematical Problems in Engineering
Volume 2014 (2014), Article ID 405784, 13 pages
http://dx.doi.org/10.1155/2014/405784
Research Article

Structural Health Monitoring Based on Combined Structural Global and Local Frequencies

1School of Civil Engineering, Dalian University of Technology, Dalian 116024, China
2Institute of Fundamental Technological Research, Polish Academy of Sciences, 02-106 Warsaw, Poland
3School of Civil Engineering, Harbin Institute of Technology, Harbin 150090, China

Received 9 August 2013; Accepted 5 December 2013; Published 9 January 2014

Academic Editor: Yuri Petryna

Copyright © 2014 Jilin Hou et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

This paper presents a parameter estimation method for Structural Health Monitoring based on the combined measured structural global frequencies and structural local frequencies. First, the global test is experimented to obtain the low order modes which can reflect the global information of the structure. Secondly, the mass is added on the member of structure to increase the local dynamic characteristic and to make the member have local primary frequency, which belongs to structural local frequency and is sensitive to local parameters. Then the parameters of the structure can be optimized accurately using the combined structural global frequencies and structural local frequencies. The effectiveness and accuracy of the proposed method are verified by the experiment of a space truss.