... to take full advantage of the method. 03 05 2011 07 05 2011 09 01 2012 09 01 2012 blades damping discs (structures) fatigue friction mechanical contact shock absorbers torsion turbines vibrations The availability of advanced linear finite element codes...

... dynamics damping discs (structures) elasticity principal component analysis As a result of manufacturing imperfection, or field damage, small geometry variations often exist among blades on a turbomachinery rotor. This condition, referred to as geometric blade mistuning [( 1 2 3 4 5...

... for which the forced response analysis cannot be avoided. On another side, the drawbacks of the group of CMS methods for such problems make their application inefficient, cumbersome, and hence, unattractive. 01 06 2010 02 06 2010 06 05 2011 06 05 2011 blades discs (structures...

... of these bladed disks with stiffness and mass mistuning treated separately. 23 05 2010 10 11 2010 28 04 2011 28 04 2011 amplification blades damping discs (structures) fatigue vibrations Blade vibration has been a major problem in gas turbines since the early days...

... and design decisions. 08 04 2010 09 04 2010 10 03 2011 10 03 2011 aerodynamics blades damping discs (structures) statistical analysis Realistic bladed disks, although designed mostly to be cyclically symmetric, are mistuned, i.e., dynamic properties of individual...

... Procedures for Mistuning Identification and Travelling Wave Excitation of Blisks ,” ASME Paper No. GT2009-59671. 11 05 2010 03 06 2010 11 11 2010 11 11 2010 blades discs (structures) electromagnets frequency response friction numerical analysis steam turbines...

... J. Appl. Mech. 0021-8936 , 64 ( 2 ), pp. 292 – 298 . 05 05 2009 24 10 2009 10 08 2010 10 08 2010 blades discs (structures) finite element analysis modal analysis turbomachinery In the context of turbomachinery design, small variations in the blade...

... forced response as compared with the tuned system. These findings were obtained on both single-degree-of-freedom per blade-disk models and a reduced order model of a blisk. blades damping discs (structures) reduced order systems shock absorbers turbomachinery vibration control blade...

... control discs (structures) fatigue internal stresses machine tools plasticity wear Fretting initiated fatigue has long been recognized as a major cause of blade dovetail and disk slot failures in aircraft turbine engines ( 1 2 3 ). Extensive research in the areas of contact mechanics ( 4...

... characteristics for mistuned bladed disks. 08 04 2009 15 04 2009 05 03 2010 05 03 2010 aerodynamics blades computational fluid dynamics damping discs (structures) gas turbines shock absorbers The key components necessary for a predictive forced response analysis...

... discs (structures) finite element analysis It is well known that small differences among blades, called mistuning, can lead to severe increases in the maximum vibration amplitude and stress levels of bladed disks ( 1 2 3 ). The increased stress can cause premature high cycle fatigue failure...

... of the turbine section. 14 12 2007 11 11 2008 09 04 2009 blades discs (structures) failure (mechanical) failure analysis fatigue cracks finite element analysis gas turbine power stations mechanical testing nozzles stress analysis surface cracks turbogenerators vibrations...

... by appropriate harmonic intentional mistuning. The proposed method can help us design a bladed disk, which is insensitive to dangerous random mistuning. aerospace engines blades design engineering discs (structures) robust control In this paper, we described the method to evaluate...

... 14 04 2008 30 12 2008 blades damping discs (structures) engines finite element analysis friction mechanical contact sensitivity analysis Cameron , T. M. , and Griffin , J. H. , 1989 , “ An Alternating Frequency/Time Domain Method for Calculating Steady...

.... 0924-090X , 50 ( 3 ), pp. 609 – 626 . 24 12 2007 17 03 2008 23 12 2008 blades damping discs (structures) elasticity friction turbines vibrations Mechanical systems with moving components always involve frictional contact, which appears in various applications...

... ,” ASME J. Turbomach. 0889-504X , 125 , pp. 113 – 120 . Whitehead , D. , 1998 , “ The Maximum Factor by Which Forced Vibration of Blades Can Increase Due to Mistuning ,” ASME J. Turbomach. 0889-504X , 120 , pp. 115 – 119 . blades discs (structures) perturbation techniques...

... et al. ( 5 ), among others, that rely on synthesis techniques using either component or system modes. This study presents an industrial application of the authors’ reduction technique to determine the modal characteristics of assemblies of bladed disks. assembling blades discs...

... friction dampers where the vibration energy in the blades is dissipated by rubbing of the mating damper and bladed disk surfaces. discs (structures) friction shock absorbers test equipment vibrations 30 07 2007 30 07 2007 29 04 2008 2008 American Society of Mechanical...

... crack lying in the {111} slip plane and aligned along the [ 1 ¯ 2 1 ¯ ] direction crack-edge stress field analysis discs (structures) fatigue cracks finite element analysis fracture mechanics nickel alloys superalloys Turbine blades in high performance aircraft...

... blisc with underplatform dampers are provided. blades discs (structures) finite element analysis friction mechanical contact sensitivity analysis shock absorbers stochastic processes vibrations The cases of two most influential UPD parameters are considered here: (i) damper mass (Fig...