INVESTIGATION OF DAMPING POTENTIAL OF STRIP DAMPER ON A REAL TURBINE BLADE
2016 (English)In: PROCEEDINGS OF THE ASME TURBO EXPO: TURBINE TECHNICAL CONFERENCE AND EXPOSITION, 2016, VOL 7A, AMER SOC MECHANICAL ENGINEERS , 2016Conference paper (Refereed)
This paper investigates the damping potential of strip dampers on a real turbine bladed disk. A 3D numerical friction contact model is used to compute the contact forces by means of the Alternate Frequency Time domain method. The Jacobian matrix required during the iterative solution is computed in parallel with the contact forces, by a quasi-analytical method. A finite element model of the strip dampers, that allows for an accurate description of their dynamic properties, is included in the steady-state forced response analysis of the bladed disk. Cyclic symmetry boundary conditions and the multiharmonic balance method are applied in the formulation of the equations of motion in the frequency domain. The nonlinear forced response analysis is performed with two different types of boundary conditions on the strip: (a) free-five and (b) elastic, and their influence is analyzed. The effect of the strip mass, thickness and the excitation levels on the forced response curve is investigated in detail.
Place, publisher, year, edition, pages
AMER SOC MECHANICAL ENGINEERS , 2016.
IdentifiersURN: urn:nbn:se:kth:diva-196479ISI: 000385461600052ScopusID: 2-s2.0-84991693685OAI: oai:DiVA.org:kth-196479DiVA: diva2:1049389
ASME Turbo Expo: Turbine Technical Conference and Exposition
QC 201611242016-11-242016-11-142016-11-24Bibliographically approved