On the effects of blade-disk interface mistuning on the response of integrated bladed rotors

Javier Avalos, X. Q. Wang, Raghavendra Murthy, Marc Mignolet

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

The response of blades in bladed disks can be represented as a sum of modal contributions from their cantilevered modes and a component induced by the motion of the disk and its interface with the blades. This last contribution referred to here as the disk-induced blade motions is generally considered to be tuned when performing mistuning analysis of bladed disks. Yet, as most of the blade properties, its structural coupling to the disk is likely to be uncertain, for example due to variations in thickness at the blade filet. One thus expects a mistuning of the interface stiffness and mass matrices in particular. The effect of this mistuning on the blade response, which does not appear to have received significant attention, is the focus of the present investigation. A Craig-Bampton methodology is introduced to highlight the disk-blade interface and a mistuning modeling of its stiffness matrix is introduced following the nonparametric modeling method. The analysis with various mistuning models is carried out on a 15-blade impeller finite element model at several resonances. It is found that a small mistuning of the disk-induced blade does not alter notably the mistuned response of the blades.

Original languageEnglish (US)
Title of host publicationProceedings of the ASME Design Engineering Technical Conference
PublisherAmerican Society of Mechanical Engineers
Volume8
ISBN (Print)9780791855997
DOIs
StatePublished - 2013
EventASME 2013 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference, IDETC/CIE 2013 - Portland, OR, United States
Duration: Aug 4 2013Aug 7 2013

Other

OtherASME 2013 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference, IDETC/CIE 2013
CountryUnited States
CityPortland, OR
Period8/4/138/7/13

Fingerprint

Blade
Rotor
Rotors
Stiffness matrix
Turbomachine blades
Structural properties
Stiffness
Motion
Nonparametric Methods
Stiffness Matrix
Modeling Method
Structural Properties
Finite Element Model
Likely
Methodology

Keywords

  • Blade vibration
  • Bladed disk
  • Interface variations
  • Mistuning
  • Nonparametric stochastic modeling
  • Random matrices

ASJC Scopus subject areas

  • Mechanical Engineering
  • Computer Graphics and Computer-Aided Design
  • Computer Science Applications
  • Modeling and Simulation

Cite this

Avalos, J., Wang, X. Q., Murthy, R., & Mignolet, M. (2013). On the effects of blade-disk interface mistuning on the response of integrated bladed rotors. In Proceedings of the ASME Design Engineering Technical Conference (Vol. 8). American Society of Mechanical Engineers. https://doi.org/10.1115/DETC2013-12092

On the effects of blade-disk interface mistuning on the response of integrated bladed rotors. / Avalos, Javier; Wang, X. Q.; Murthy, Raghavendra; Mignolet, Marc.

Proceedings of the ASME Design Engineering Technical Conference. Vol. 8 American Society of Mechanical Engineers, 2013.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Avalos, J, Wang, XQ, Murthy, R & Mignolet, M 2013, On the effects of blade-disk interface mistuning on the response of integrated bladed rotors. in Proceedings of the ASME Design Engineering Technical Conference. vol. 8, American Society of Mechanical Engineers, ASME 2013 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference, IDETC/CIE 2013, Portland, OR, United States, 8/4/13. https://doi.org/10.1115/DETC2013-12092
Avalos J, Wang XQ, Murthy R, Mignolet M. On the effects of blade-disk interface mistuning on the response of integrated bladed rotors. In Proceedings of the ASME Design Engineering Technical Conference. Vol. 8. American Society of Mechanical Engineers. 2013 https://doi.org/10.1115/DETC2013-12092
Avalos, Javier ; Wang, X. Q. ; Murthy, Raghavendra ; Mignolet, Marc. / On the effects of blade-disk interface mistuning on the response of integrated bladed rotors. Proceedings of the ASME Design Engineering Technical Conference. Vol. 8 American Society of Mechanical Engineers, 2013.
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