Application of Piezofilms for Excitation and Active Damping of Blade Flexural Vibration
The steam turbine blades of low pressure stages are endangerd by the high-cyclic fatigue due to the combined loading of dynamic stresses by the steam time-variant pressure and the pre-stress from centrifugal forces. Therefore, the importance of their experimental dynamic analysis in the design stage...
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| Format: | Article |
| Language: | English |
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Institute of Fundamental Technological Research Polish Academy of Sciences
2015-01-01
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| Series: | Archives of Acoustics |
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| Online Access: | https://acoustics.ippt.pan.pl/index.php/aa/article/view/1439 |
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| author | Ludek PESEK Ladislav PUST Vitezslav BULA Jan CIBULKA |
| author_facet | Ludek PESEK Ladislav PUST Vitezslav BULA Jan CIBULKA |
| author_sort | Ludek PESEK |
| collection | DOAJ |
| description | The steam turbine blades of low pressure stages are endangerd by the high-cyclic fatigue due to the combined loading of dynamic stresses by the steam time-variant pressure and the pre-stress from centrifugal forces. Therefore, the importance of their experimental dynamic analysis in the design stage is critical. For laboratory tests of the blades, the piezo actuators placed on the blades, unlike electromagnets placed in the stationary space, give a possibility to excite the flexural vibration of the blades within the bladed disk by time continuous forces independently of the rotor revolutions. In addition, the piezo actuators can be also used to control the vibrations of the blade. Therefore, several dynamic experiments of the clamped model blade equipped with PVDF films were performed for the force description of the piezo foils and their behavior as actuators of the blade vibration. The numerical beam models were used for numerical analysis of the vibration suppression effects both by additional parametric excitation and by active damping. The optimal phase shift of piezo actuator voltage supply was ascertained both for amplitude amplification and suppression. The results contribute to the knowledge of the actuation and active damping of blade vibration by the piezo elements. |
| format | Article |
| id | doaj-art-7cc031d14c734644a212ed55a55aa4fc |
| institution | DOAJ |
| issn | 0137-5075 2300-262X |
| language | English |
| publishDate | 2015-01-01 |
| publisher | Institute of Fundamental Technological Research Polish Academy of Sciences |
| record_format | Article |
| series | Archives of Acoustics |
| spelling | doaj-art-7cc031d14c734644a212ed55a55aa4fc2025-08-20T02:39:19ZengInstitute of Fundamental Technological Research Polish Academy of SciencesArchives of Acoustics0137-50752300-262X2015-01-0140110.1515/aoa-2015-0008Application of Piezofilms for Excitation and Active Damping of Blade Flexural VibrationLudek PESEK0Ladislav PUST1Vitezslav BULA2Jan CIBULKA3Institute of Thermomechanics AS CR, v.v.i.Institute of Thermomechanics AS CR, v.v.i.Institute of Thermomechanics AS CR, v.v.i.Institute of Thermomechanics AS CR, v.v.i.The steam turbine blades of low pressure stages are endangerd by the high-cyclic fatigue due to the combined loading of dynamic stresses by the steam time-variant pressure and the pre-stress from centrifugal forces. Therefore, the importance of their experimental dynamic analysis in the design stage is critical. For laboratory tests of the blades, the piezo actuators placed on the blades, unlike electromagnets placed in the stationary space, give a possibility to excite the flexural vibration of the blades within the bladed disk by time continuous forces independently of the rotor revolutions. In addition, the piezo actuators can be also used to control the vibrations of the blade. Therefore, several dynamic experiments of the clamped model blade equipped with PVDF films were performed for the force description of the piezo foils and their behavior as actuators of the blade vibration. The numerical beam models were used for numerical analysis of the vibration suppression effects both by additional parametric excitation and by active damping. The optimal phase shift of piezo actuator voltage supply was ascertained both for amplitude amplification and suppression. The results contribute to the knowledge of the actuation and active damping of blade vibration by the piezo elements.https://acoustics.ippt.pan.pl/index.php/aa/article/view/1439vibration suppressionparametric antiresonanceactive dampingPVDF films |
| spellingShingle | Ludek PESEK Ladislav PUST Vitezslav BULA Jan CIBULKA Application of Piezofilms for Excitation and Active Damping of Blade Flexural Vibration Archives of Acoustics vibration suppression parametric antiresonance active damping PVDF films |
| title | Application of Piezofilms for Excitation and Active Damping of Blade Flexural Vibration |
| title_full | Application of Piezofilms for Excitation and Active Damping of Blade Flexural Vibration |
| title_fullStr | Application of Piezofilms for Excitation and Active Damping of Blade Flexural Vibration |
| title_full_unstemmed | Application of Piezofilms for Excitation and Active Damping of Blade Flexural Vibration |
| title_short | Application of Piezofilms for Excitation and Active Damping of Blade Flexural Vibration |
| title_sort | application of piezofilms for excitation and active damping of blade flexural vibration |
| topic | vibration suppression parametric antiresonance active damping PVDF films |
| url | https://acoustics.ippt.pan.pl/index.php/aa/article/view/1439 |
| work_keys_str_mv | AT ludekpesek applicationofpiezofilmsforexcitationandactivedampingofbladeflexuralvibration AT ladislavpust applicationofpiezofilmsforexcitationandactivedampingofbladeflexuralvibration AT vitezslavbula applicationofpiezofilmsforexcitationandactivedampingofbladeflexuralvibration AT jancibulka applicationofpiezofilmsforexcitationandactivedampingofbladeflexuralvibration |