Numerical and Experimental Study of Friction Damping Blade Attachments of Rotating Bladed Disks
In order to mitigate high cycle fatigue risks in bladed disks, the prediction of the vibration levels early in the design process is important. Therefore, the different sources of damping need to be modeled accurately. In this paper the impact of friction in blade attachments on forced response is i...
Saved in:
| Main Authors: | , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Wiley
2006-01-01
|
| Series: | International Journal of Rotating Machinery |
| Online Access: | http://dx.doi.org/10.1155/IJRM/2006/71302 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1832558688562315264 |
|---|---|
| author | D. Charleux C. Gibert F. Thouverez J. Dupeux |
| author_facet | D. Charleux C. Gibert F. Thouverez J. Dupeux |
| author_sort | D. Charleux |
| collection | DOAJ |
| description | In order to mitigate high cycle fatigue risks in bladed disks, the prediction of the vibration levels early in the design process is important. Therefore, the different sources of damping need to be modeled accurately. In this paper the impact of friction in blade attachments on forced response is investigated both numerically and experimentally. An efficient multiharmonic balance method is proposed in order to compute the forced response of bladed disks with contact and friction nonlinearities in blade roots. For experimental validation purposes, a rotating bladed disk was tested in a vacuum chamber, with excitation being provided by piezoelectric actuators. A model of the rig was built and numerical results were obtained with a normal load dependent coefficient of friction and a constant material damping ratio. Nonlinear behavior observed experimentally at resonances was well reproduced and an acceptable correlation was found with experimental resonant frequencies, amplitudes, and amount of damping throughout the spinning speed and excitation level range. The proposed numerical method can therefore serve to enhance the prediction of the alternating stresses in bladed disk assemblies. |
| format | Article |
| id | doaj-art-cf46e64c845a4bb58f7104c10ece789d |
| institution | Kabale University |
| issn | 1023-621X 1542-3034 |
| language | English |
| publishDate | 2006-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | International Journal of Rotating Machinery |
| spelling | doaj-art-cf46e64c845a4bb58f7104c10ece789d2025-02-03T01:31:50ZengWileyInternational Journal of Rotating Machinery1023-621X1542-30342006-01-01200610.1155/IJRM/2006/7130271302Numerical and Experimental Study of Friction Damping Blade Attachments of Rotating Bladed DisksD. Charleux0C. Gibert1F. Thouverez2J. Dupeux3Equipe Dynamique des Structures et des Syst\`{e}me, Laboratoire de Tribologie et de Dynamique des Syst\`{e}mes, UMR CNRS 5513, Ecole Centrale de Lyon, 36 avenue Guy de Collongue, Ecully Cedex 69134, FranceEquipe Dynamique des Structures et des Syst\`{e}me, Laboratoire de Tribologie et de Dynamique des Syst\`{e}mes, UMR CNRS 5513, Ecole Centrale de Lyon, 36 avenue Guy de Collongue, Ecully Cedex 69134, FranceEquipe Dynamique des Structures et des Syst\`{e}me, Laboratoire de Tribologie et de Dynamique des Syst\`{e}mes, UMR CNRS 5513, Ecole Centrale de Lyon, 36 avenue Guy de Collongue, Ecully Cedex 69134, FranceSNECMA, Site de Villaroche, Moissy Cramayel 77550, FranceIn order to mitigate high cycle fatigue risks in bladed disks, the prediction of the vibration levels early in the design process is important. Therefore, the different sources of damping need to be modeled accurately. In this paper the impact of friction in blade attachments on forced response is investigated both numerically and experimentally. An efficient multiharmonic balance method is proposed in order to compute the forced response of bladed disks with contact and friction nonlinearities in blade roots. For experimental validation purposes, a rotating bladed disk was tested in a vacuum chamber, with excitation being provided by piezoelectric actuators. A model of the rig was built and numerical results were obtained with a normal load dependent coefficient of friction and a constant material damping ratio. Nonlinear behavior observed experimentally at resonances was well reproduced and an acceptable correlation was found with experimental resonant frequencies, amplitudes, and amount of damping throughout the spinning speed and excitation level range. The proposed numerical method can therefore serve to enhance the prediction of the alternating stresses in bladed disk assemblies.http://dx.doi.org/10.1155/IJRM/2006/71302 |
| spellingShingle | D. Charleux C. Gibert F. Thouverez J. Dupeux Numerical and Experimental Study of Friction Damping Blade Attachments of Rotating Bladed Disks International Journal of Rotating Machinery |
| title | Numerical and Experimental Study of Friction Damping Blade Attachments of Rotating Bladed Disks |
| title_full | Numerical and Experimental Study of Friction Damping Blade Attachments of Rotating Bladed Disks |
| title_fullStr | Numerical and Experimental Study of Friction Damping Blade Attachments of Rotating Bladed Disks |
| title_full_unstemmed | Numerical and Experimental Study of Friction Damping Blade Attachments of Rotating Bladed Disks |
| title_short | Numerical and Experimental Study of Friction Damping Blade Attachments of Rotating Bladed Disks |
| title_sort | numerical and experimental study of friction damping blade attachments of rotating bladed disks |
| url | http://dx.doi.org/10.1155/IJRM/2006/71302 |
| work_keys_str_mv | AT dcharleux numericalandexperimentalstudyoffrictiondampingbladeattachmentsofrotatingbladeddisks AT cgibert numericalandexperimentalstudyoffrictiondampingbladeattachmentsofrotatingbladeddisks AT fthouverez numericalandexperimentalstudyoffrictiondampingbladeattachmentsofrotatingbladeddisks AT jdupeux numericalandexperimentalstudyoffrictiondampingbladeattachmentsofrotatingbladeddisks |