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Improving the performance of model-based damage detection methods through the use of an updated analytical model |
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| Institution: | 1. Department of Structural Mechanics, Technical University of Madrid, José Gutiérrez Abascal 2, Madrid 28006, Spain;2. School of Civil Engineering, Chongqing University, Chongqing 400045, PR China;3. Key Laboratory of New Technology for Construction of Cities in Mountain Area (Chongqing University), Ministry of Education, Chongqing 400045, PR China;1. University of Ottawa, Dept. of Civil Engineering, Ottawa, ON K1N 6N5, Canada;2. University of New Brunswick, Hybrid Construction Research Group, Fredericton, NB E3B 6C2, Canada;1. School of Civil Engineering, Beijing Jiaotong University, Beijing 100044, China;2. Railway Engineering Research Institute, China Academy of Railway Sciences Corporation Limited, Beijing 100081, China |
| Abstract: | The advantages of finite-element model updating in association with a model-based method for structural damage localisation are investigated. An approach designed to identify and locate delamination damages in carbon fibre reinforced polymers is used. The method is based on a correlation between measured damage-induced modal damping variations from an elasto-mechanic structure and the corresponding data from a numerical model in order to derive information on the damage location. Using a numerical model enables to locate damage in a three-dimensional structure from experimental data obtained with only a single response sensor. To acquire sufficiently accurate experimental data a polynomial curve fitting technique is used to extract damping parameters from measured frequency responses. It will be shown that in order to achieve a good localisation precision the numerical model must retain a high degree of accuracy and physical consistency. |
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