Abstract
Most identification schemes require knowledge of the explicit functional form that describes the phenomenon in question. Unlike conventional identification methods, the present approach does not require an explicit functional form and is conceived to work with numerical values. The approach requires both the measured natural frequencies of the debonded structure and the theoretical dependence of the natural frequencies on debond location and length. A “simply supported” sandwich beam is used to illustrate the proposed identification scheme. The information from the first three natural frequencies is found to be sufficient to uniquely identify the presence of debonding. This claim is validated for debonds of various length and location for the specified sandwich beam layout.
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