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Structural Engineering and Mechanics Volume 39, Number 2, July25 2011, pages 223-239 DOI: http://dx.doi.org/10.12989/sem.2011.39.2.223 |
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A dynamic nondestructive damage detection methodology for orthotropic plate structures |
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Amir Hossein Gandomi, Mohammad G. Sahab and Alireza Rahai
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| Abstract | ||
| This paper presents a methodology to detect and locate damages and faults in orthotropic plate structures. A specific damage index based on dynamic mode shapes of the damaged and undamaged structures has been introduced. The governing differential equation on transverse deformation, the transverse shear force equations and the invariant expression for the sum of transverse loading of an orthotropic plate are employed to obtain the aforementioned damage indices. The validity of the proposed methodology for isotropic and orthotropic damage states is demonstrated using a numerical example. It is shown that the algorithm is able to detect damages for both isotropic and orthotropic damage states acceptably. | ||
| Key Words | ||
| damage detection; orthotropic plates; modal parameters; damage indices | ||
| Address | ||
| Amir Hossein Gandomi, Mohammad G. Sahab: Department of Civil Engineering, Tafresh University, Tafresh, Iran Alireza Rahai: Department of Civil and Environmental Engineering, Amirkabir University of Technology, Tehran, Iran | ||