Closure to 'Damage Localization and Finite-Element Model Updating Using Multiresponse NDT Data' by Masoud Sanayei, Erin Santini Bell, Chitra N. Javdekar, Jennifer L. Edelmann, and Eugene Slavsky

摘要

Response 1: The writers wish to respond the discussers' enumerated comments on page 695, Table 3 shows that 21 vertical measured coordinates of the five modes used. Paragraph 2 of the same page indicates that three static load cases were used with 9 (typographical error in the original paper, written as 11) measured displacements. These are two different sparse subsets of degrees of freedom (DOFs) available for measurements. Stacking of static and modal error functions, as shown in Eqs. (14) and (15), can be used for parameter estimation. Using stacking of error functions, it is not required to have the same subset of measurements in static load cases, modal measurements, or a combination thereof. More case studies with stacking of error functions are presented in Santini-Bell et al. (2007).