Aa. Ferri et Bs. Heck, VIBRATION ANALYSIS OF DRY FRICTION DAMPED TURBINE-BLADES USING SINGULAR PERTURBATION-THEORY, Journal of vibration and acoustics, 120(2), 1998, pp. 588-595
The dynamic behavior of a turbine blade with an attached dry friction
damper is investigated. Due to the presence of both high and low frequ
ency resonances, the system is numerically stiff and time consuming to
simulate. Three reduced-order models that remove the numerical stiffn
ess problem are developed using singular perturbation theory. Two of t
hese models are developed for the case of small damper mass, and the t
hird model is developed for the case of high damper stiffness. It is s
hown that these models are consistent with two physically-motivated ap
proximate models that have appeared in the literature. The accuracy of
each approximate model is examined for a range of system and excitati
on parameters through comparison with the original full-order model. I
t is seen that inclusion of damper mass has a significant effect on th
e blade system response.