Using the Detection and Relative Damage Quantification Indicator (DRQ) with transmissibility

摘要: The Detection and Relative Damage Quantification Indicator (DRQ) was presented previously as a reliable damage detection indicator when used with Operational Deflection Shapes (ODS). DRQ computed from the Response Vector Assurance Criterion (RVAC) between damaged initial ODS resulting value proved to be good of presence damage. use implies that loads applied structure without are either known or, at least, same. If forces not deterministic but still ergodic, power spectrum could evaluate ODS, above conditions hold, in statistical sense. When is subjected ambient excitation, those can hardly assured. may vary quite significantly changes due instead To avoid this handicap, authors explore here Transmissibility functions. properly defined, invariant respect amplitude loads. Since Displacement load invariant, picked set responses measured service predict another set; result will then correlated actual values using RVAC computed. Numerical experimental examples illustrate proposed technique.