... frequency-domain analysis friction turbomachinery vibrations wear Sources of nonlinearity in turbomachinery are multiple. Contact with friction is one of the most important causes of nonlinearity in turbomachinery, especially in bladed-disks. Contact with friction must be taken into account...

... on the identification of dynamic models of a jet engine and could well be transferred to the present application. 08 07 2010 16 07 2010 08 04 2011 08 04 2011 engines frequency-domain analysis gas turbines least mean squares methods gas path analysis frequency domain least...

... 2010 22 03 2011 22 03 2011 aerospace engines damping frequency-domain analysis harmonics springs (mechanical) time-domain analysis vibrations Of all rotating machines that use squeeze-film damper (SFD) bearings, three-spool aero-engines can be considered as the most...

... to compute the vibration response. The presented methodology is applied to the calculation of the forced response of a nonlinear coupled turbine blading in the frequency domain. 14 04 2009 08 09 2009 26 05 2010 26 05 2010 blades failure (mechanical) fatigue frequency-domain...

... present. This leads to minor changes in the frequency-domain analysis, such as the values of the axial wave numbers. In Eq. 9b , only a single value of n is now considered, with Θ 1 n ( θ ) = Θ 2 n ( θ ) = e i n θ . Hence only a single transfer function...

.... Simulations showed that the cross-coupled stiffness could be reduced by increasing either the supply pressure or the feed parameter. Direct damping showed increasing trend with the supply pressure and the feed parameter. Frequency-domain analysis of the bearing coefficients was also performed. The direct...

... improves the accuracy of the force measurements ( 1 ). damping finite element analysis force measurement frequency-domain analysis magnetic bearings position measurement rotors strain gauges turbomachinery 01 05 2007 08 06 2007 03 03 2008 2008 American Society...

... = T 2 − T 3 U 2 → T 3 = T 2 − q ∙ U 2 01 10 2005 01 02 2006 friction damping machine bearings turbomachinery dynamic testing shafts time-domain analysis frequency-domain analysis Foil bearings (FBs) are made of one or more...

... 1, 2004. IGTI Review Chair: A. J. Strazisar. 13 June 2004 01 October 2003 01 March 2004 24 06 2005 frequency response electric machines lubricating oils rotors machine bearings dynamic response frequency-domain analysis hydrodynamics vibrations Rotating...