... 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...

.... More specifically, the mean-squared estimation error is shown to drastically decrease when using transient input signals. This study is conducted with an engine model representative of a commercial turbofan. engines frequency-domain analysis gas turbines least mean squares methods gas path...

... 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...

... Fourier transforms frequency-domain analysis gas turbines Green's function methods Mach number thermoacoustics time-domain analysis transfer functions LPP combustion is a method of reducing NO x emissions from gas turbines by mixing the fuel and air more evenly before...

.... 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...

.... fiber-optic strain gauge (FOSG) technology substantially 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...

... temperature ∼ 25 ° C . ( a ) Over entire frequency range, ( b ) for constant phase angle ( θ ) , i.e., f < 150 Hz . FB structure stiffness and system mass derived from frequency domain analysis Temperature[°C] F o at 20 Hz [N...

... 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...