...-mail:  patrick.b.lamas@usp.br e-mail:  rnicolet@sc.usp.br 04 04 2022 29 08 2022 29 11 2022 rotordynamics vibration structural dynamics modal analysis C 1 , C 2 = correction factors d S , d D = shaft and disk diameters e D = disk thickness H 1 , H...

... 04 2022 08 09 2022 28 11 2022 1 Corresponding author. e-mail:  anthony.tacher@ec-lyon.fr flutter mistuning Coriolis effect cyclic symmetry modal analysis Aeroelasticity is a branch of physics that is highly regarded in the aeronautics field. It studies the fluid...

... of the different sectors, which can be obtained from a usual cyclic symmetry modal analysis. Hence the projection basis is constituted; as well as, on the whole bladed disk, each sector matrix is reduced by its own modes. The method is validated numerically on a real bladed disk model, by comparing free and forced...

... is established in which the contact stress is defined by the pretightening force. The relationship is then applied on the modal analysis of a real gas turbine rotor, and its modal test results and finite element analysis results are consistent with each other, proving that the relationship and the described...

... to vibrate at resonance. In order to illustrate the modal shapes of the main blade during resonant vibration, two studies were conducted. First of all, a modal analysis calculation was performed using finite element model (FEM) and a cyclically symmetrical model. Second, the modal shapes were optically...

... 01 Mar 2002 11 08 2004 rotors modal analysis parameter estimation calibration vibration measurement Balancing of flexible rotors has acquired the attention of many researchers since the days of Thearle 1 . The main balancing techniques are the influence coefficient method...

... 01 February 2000 15 08 2003 turbines rotation modelling modal analysis vibrations frequency estimation finite element analysis mathematical morphology When a structure has two modes with closely spaced natural frequencies, their corresponding mode shapes can interact...

... of elements vibrational modes modal analysis harmonics sensitivity stability modelling Turbine engine bladed disks belong to a class of structures generally referred to as periodic. Such structures exhibit families of extended modes with closely spaced natural frequencies. The close proximity...

... . Manuscript received by the S&D Division Nov. 2000; final revision received by the ASME Headquarters May 2002. Associate Editor: M. Mignolet. 01 Nov 2000 01 May 2002 27 12 2002 vibrations modal analysis parameter estimation gas turbines rotors bending numerical analysis...

... with projection of mistuning data ( 10 11 ), or a combination of both approaches in the form of a secondary modal analysis reduction technique (SMART) ( 8 9 ). Some of the more recent techniques exhibit significant improvements over the chosen approach...

... to the retained component interface degrees of freedom. It is demonstrated that this problem is alleviated by a secondary modal analysis reduction technique (SMART). In addition, a non-CMS mistuning projection method is considered. Although this method is elegant and accurate, it is seen that it lacks...

...R. Bladh, Graduate Student; M. P. Castanier, Assistant Research Scientist; C. Pierre, Professor Component mode synthesis (CMS) techniques are widely used for dynamic analyses of complex structures. Significant computational savings can be achieved by using CMS, since a modal analysis is performed...

... blade alone natural frequencies. rotors turbines vibrations vibrational modes modal analysis identification parameter estimation frequency response elasticity mass 04 May 1999 09 June 1999 Contributed by the Structures & Dynamics Division of THE AMERICAN...

... received by the S&D Division, May 4, 1999; final revision received by the ASME Headquarters June 9, 1999. Editor: H. D. Nelson. 04 May 1999 09 June 1999 rotors turbines vibrations vibrational modes modal analysis identification parameter estimation frequency response...