A methodology is presented for detecting damage of highly damped structural systems. Direct frequency response functions along with a correlated analytical model of the undamaged structure are used to detect and assess damage using residual force vectors. A sensitivity analysis using a least-squares approximation is used to assess the extent of damage in the face of changes in the system mass distribution, damping mechanism, and structure stiffness. Both VEM and fluid strut (one-dimensional) dampers are applied to an analytical model of a space truss. Numerical results are presented to validate and assess the proposed approach. The advantages and limitations of this method are examined. This methodology can also be used to perform system identification.
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