document: Closed loop finite-element modeling of active constrained layer damping in the time domain analysis A three-dimensional finite-element closed-loop model has been developed to predict the effects of active-passive damping on a vibrating structure . The Golla-Hughes-McTavish method is employed to capture the viscoelastic material behavior in a time domain analysis . The parametric study includes the different control gains as well as geometric parameters related to the active constrained layer damping -LRB- ACLD -RRB- treatment . Comparisons are made among several ACLD models , the passive constrained model and the active damping model . The results obtained here reiterate that ACLD is somewhat better for vibration suppression than either the purely passive or the active system and provides higher structural damping with less control gain when compared to the purely active system . Since the ACLD performance can be reduced by the viscoelastic layer , the design of the ACLD model must be given a careful consideration in order to optimize the effect of passive damping
doc_bio_tags: O O O O O B I I I O O B I I O O O O O O O O O O O O O O O O O O O O O O O O O O O O B I O O O B I I O O O O O O O O O O O O O O O O O B I I I O O O O O O O O O O B I O O B I I O O B I I O O O O O O O O O O O O B I O O O O O O O O O O O O B I O O O O O O O O O O O O O O O O O O O O O B I O O O O O O O O O O O O O O O O O O O O B I
extractive_keyphrases: viscoelastic material time domain analysis active constrained layer damping acld models passive constrained model active damping model passive damping vibration suppression structural damping viscoelastic layer
abstractive_keyphrases: three-dimensional finite-element closed-loop model golla-hughes-mctavish method