Statistical Model-Based Damage Localization: Implementation with the Scilab Toolbox COSMAD

A free modal analysis and diagnosis toolbox has been designed and successfully applied by some of the authors. It is an identification, detection and localization Scilab toolbox for in-operation situation without any measured or controlled input. The damage localization module and function developed recently within this toolbox is presented in this paper. This damage localization method is based on a residual associated with output-only subspace-based modal identification and global or focused 2 χ -tests built on that residual. Moreover, the proposed damage localization approach is also available for a large structure, in such a case, a statistical substructuring method is employed and also implemented with this toolbox. The detailed operations for generating statistical substructuring are also presented. A simulated bridge deck example is reported for explaining the function of toolbox.

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