Study on the vibration characteristics of bladed disks (Effect of damping variation on the resonant responses of bladed disks)
Although bladed disks are nominally designed to be cyclically symmetric (tuned system), the vibration characteristics of all blades on a disk are slightly different due to the manufacturing tolerance, deviations in the material properties, and wear during operation. These small variations break the...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | Japanese |
| Published: |
The Japan Society of Mechanical Engineers
2022-05-01
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| Series: | Nihon Kikai Gakkai ronbunshu |
| Subjects: | |
| Online Access: | https://www.jstage.jst.go.jp/article/transjsme/88/910/88_21-00333/_pdf/-char/en |
| _version_ | 1798018109221634048 |
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| author | Yasutomo KANEKO Riku YOSHIDA Toshio WATANABE Tatsuya FURUKAWA |
| author_facet | Yasutomo KANEKO Riku YOSHIDA Toshio WATANABE Tatsuya FURUKAWA |
| author_sort | Yasutomo KANEKO |
| collection | DOAJ |
| description | Although bladed disks are nominally designed to be cyclically symmetric (tuned system), the vibration characteristics of all blades on a disk are slightly different due to the manufacturing tolerance, deviations in the material properties, and wear during operation. These small variations break the cyclic symmetry and split the eigenvalue pairs. Bladed disks with small variations are referred to as a mistuned system. Many researchers suggest that while mistuning has an undesirable effect on the forced response, it has a beneficial (stabilizing) effect on blade flutter (the self-excited vibration). However, almost all studies have focused on the deviation of the blade frequency, and few studies have discussed the damping mistuning. In a blisk (integrally manufactured bladed disk), it seems that the damping mistuning can be neglected because the material damping is dominant. However, in a bladed disk with the blade root inserted into the disk groove, the damping mistuning caused by the partial contact between the root and groove in rotation cannot be neglected in predicting the resonant response of the bladed disk. Therefore, in this study, incorporating the damping mistuning into the FMM (Fundamental Mistuning Model), the frequency response analysis of the bladed disk is systematically carried out. From the calculated results, the effect of the damping mistuning on the vibration response of the bladed disk is clarified. |
| first_indexed | 2024-04-11T16:18:25Z |
| format | Article |
| id | doaj.art-21d1b687738747c6ba2a7b30be44e683 |
| institution | Directory Open Access Journal |
| issn | 2187-9761 |
| language | Japanese |
| last_indexed | 2024-04-11T16:18:25Z |
| publishDate | 2022-05-01 |
| publisher | The Japan Society of Mechanical Engineers |
| record_format | Article |
| series | Nihon Kikai Gakkai ronbunshu |
| spelling | doaj.art-21d1b687738747c6ba2a7b30be44e6832022-12-22T04:14:26ZjpnThe Japan Society of Mechanical EngineersNihon Kikai Gakkai ronbunshu2187-97612022-05-018891021-0033321-0033310.1299/transjsme.21-00333transjsmeStudy on the vibration characteristics of bladed disks (Effect of damping variation on the resonant responses of bladed disks)Yasutomo KANEKO0Riku YOSHIDA1Toshio WATANABE2Tatsuya FURUKAWA3Department of Mechanical and Systems Engineering, Ryukoku UniversityDepartment of Mechanical and Systems Engineering, Ryukoku UniversityMitsubishi Heavy Industries, Ltd.Mitsubishi Heavy Industries, Ltd.Although bladed disks are nominally designed to be cyclically symmetric (tuned system), the vibration characteristics of all blades on a disk are slightly different due to the manufacturing tolerance, deviations in the material properties, and wear during operation. These small variations break the cyclic symmetry and split the eigenvalue pairs. Bladed disks with small variations are referred to as a mistuned system. Many researchers suggest that while mistuning has an undesirable effect on the forced response, it has a beneficial (stabilizing) effect on blade flutter (the self-excited vibration). However, almost all studies have focused on the deviation of the blade frequency, and few studies have discussed the damping mistuning. In a blisk (integrally manufactured bladed disk), it seems that the damping mistuning can be neglected because the material damping is dominant. However, in a bladed disk with the blade root inserted into the disk groove, the damping mistuning caused by the partial contact between the root and groove in rotation cannot be neglected in predicting the resonant response of the bladed disk. Therefore, in this study, incorporating the damping mistuning into the FMM (Fundamental Mistuning Model), the frequency response analysis of the bladed disk is systematically carried out. From the calculated results, the effect of the damping mistuning on the vibration response of the bladed disk is clarified.https://www.jstage.jst.go.jp/article/transjsme/88/910/88_21-00333/_pdf/-char/enturbomachineryforced vibrationbladedampingmistuning |
| spellingShingle | Yasutomo KANEKO Riku YOSHIDA Toshio WATANABE Tatsuya FURUKAWA Study on the vibration characteristics of bladed disks (Effect of damping variation on the resonant responses of bladed disks) Nihon Kikai Gakkai ronbunshu turbomachinery forced vibration blade damping mistuning |
| title | Study on the vibration characteristics of bladed disks (Effect of damping variation on the resonant responses of bladed disks) |
| title_full | Study on the vibration characteristics of bladed disks (Effect of damping variation on the resonant responses of bladed disks) |
| title_fullStr | Study on the vibration characteristics of bladed disks (Effect of damping variation on the resonant responses of bladed disks) |
| title_full_unstemmed | Study on the vibration characteristics of bladed disks (Effect of damping variation on the resonant responses of bladed disks) |
| title_short | Study on the vibration characteristics of bladed disks (Effect of damping variation on the resonant responses of bladed disks) |
| title_sort | study on the vibration characteristics of bladed disks effect of damping variation on the resonant responses of bladed disks |
| topic | turbomachinery forced vibration blade damping mistuning |
| url | https://www.jstage.jst.go.jp/article/transjsme/88/910/88_21-00333/_pdf/-char/en |
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