Load Vectors for Damage Location in Systems Identified from Operational Loads

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Abstract
A method to interrogate changes in transfer matrices regarding damage localization is extended to cases where these changes cannot be experimentally obtained because the input is not known deterministically. The extension is realized by noting that the method does not require the transfer matrix change explicitly, but only vectors from its kernel, and that some of these vectors can be estimated—for a fictive collocated input distribution—from constraints between realization matrices and results of an output-only identification. The interrogation approach, denoted as the stochastic dynamic damage locating vector method, is demonstrated in the context of simulations.

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