期刊
COMPUTERS & STRUCTURES
卷 146, 期 -, 页码 176-184出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.compstruc.2014.10.011
关键词
Damage identification; Random excitation; Pseudo excitation method; Sensitivity analysis; Power spectral density
资金
- National Natural Science Foundation of China [11172333, 11272361]
- Doctoral Program Foundation of Ministry of Education of China [20130171110039]
- Guangdong Province Science and Technology Program [2012A030200011]
- Fundamental Research Funds for the Central Universities [13lgzd06]
- China Postdoctoral Science Foundation [2013M531893]
A new method is proposed to identify locations and severities of structural damages based on the power spectral density sensitivity analysis. Firstly, the structural responses and power spectral density under stationary and random excitations are calculated using pseudo excitation method. Then, the sensitivities of power spectral density with respect to the structural damage parameters are obtained. Finally, the finite element model updating method is adopted to identify the structural damages from the calculated and the simulated measured power spectral density. Two numerical examples demonstrate the satisfactory identification results obtained from the present method. (C) 2014 Elsevier Ltd. All rights reserved.
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