Application of Piezofilms for Excitation and Active Damping of Blade Flexural Vibration

• Autorzy: Pešek L. , Půst L. , Bula V. , Cibulka J.

Identyfikatory

DOI

10.1515/aoa-2015-0008

• Języki publikacji: EN

Abstrakty

EN

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.

Słowa kluczowe

EN

vibration suppression; parametric antiresonance; active damping; PVDF films

• Wydawca: Instytut Podstawowych Problemów Techniki PAN ; Komitet Akustyki PAN ; Polskie Towarzystwo Akustyczne
• Czasopismo: Archives of Acoustics
• Rocznik: 2015
• Tom: Vol. 40, No. 1
• Strony: 59--69
• Opis fizyczny: Bibliogr. 19 poz., rys., wykr.

Twórcy

autor

Pešek L.

• Institute of Thermomechanics AS CR, v.v.i. Dolejˇskova 5, 18200 Praha 8, Czech Republic

autor

Půst L.

• Institute of Thermomechanics AS CR, v.v.i. Dolejˇskova 5, 18200 Praha 8, Czech Republic

autor

Bula V.

• Institute of Thermomechanics AS CR, v.v.i. Dolejˇskova 5, 18200 Praha 8, Czech Republic

autor

Cibulka J.

• Institute of Thermomechanics AS CR, v.v.i. Dolejˇskova 5, 18200 Praha 8, Czech Republic

Bibliografia

• 1. Augustyn E., Kozien M.S. (2014), A Study on Possibility to Apply Piezoelectric Actuators for Active Reduction of Torsional Beams Vibrations, Acta Physica Polonica, 125, 4A, A164–A168.
• 2. Bell A.J. (1993), Multilayer ceramic processing, Ferroelectric Ceramics, Birkh¨auser Verlag, Basel, 241–271.
• 3. Jarzyna W., Augustyniak M., Bochenski M., Warminski J. (2012), PD and LQR controllers applied to vibration damping of an active composite beam, Przeglad Elektrotechniczny, 88, 10B, 128–131.
• 4. Nader M., Berger W. (2013), Applications of piezoelectric patches for active noise and vibration reduction or generation, Proceedings of 6th ECCOMAS Conference on Smart Structures and Materials, 11 pages, 2013, Turin.
• 5. Nordman R. (2005), Mechatronic systems in Machinery I, [in German: Mechatronische Systeme im Maschinenbau I.], Shaker-Verlag, Darmstadt.
• 6. Peˇsek L., Hajˇzman M., P˚ust L., Zeman V., Bystus M., Br˚uha J. (2014a), Experimental and numerical investigation of friction element dissipative effects in blade shrouding, Journal of Nonlinear Dynamics, Springer, published on-line, 12 pages, DOI: 10.1007/s11071-014-1763-3.
• 7. Peˇsek L., P˚ust L., Bula V., Vanˇek F. (2012), Interslip damping of twisted blades in opposed bundles under rotation, Proceedings of 10th International Conference on Vibrations in Rotating Machinery, Woodhead Publishing Limited Book, pp. 293–302, London.
• 8. Peˇsek L., Vanˇek Fr., P˚ust L., Bula L, Cibulka J. (2010), Testing of dynamics of blade wheel with double periodicity, Engineering Mechanics, 17, 3/4, 237–250.
• 9. Peˇsek L., Vanˇek F., Bula V., Cibulka J. (2011), Excitation of blade vibration under rotation by synchronous electromagnet, Engineering Mechanics, 18, 3/4, 1–9.
• 10. Peˇsek L., Tondl A. (2012), Contribution to application of parametric ‘anti-resonance’ for autoparametric systems, Egineering Mechanics, 19, 5, 1–9.
• 11. Peˇsek L., P˚ust L, Bula V., Cibulka J. (2014b) Testing of piezofilms for actuation and active control of blade flexural vibration, Proceedings of 7th EAA Conference on Forum Acusticum, 12 pages, Krakow.
• 12. Preumont A. (2011), Vibration Control of Active Structures, Springer-Verlag, Berlin.
• 13. P˚ust L., Peˇsek L. (2011), Vibration of circular bladed disk with imperfections, International Journal of Bifurcation and Chaos, 21, 10, 2893–2904.
• 14. Rybak L.A. et al. (1997), Synthesis of active systems of vibroisolations on space objects, [in Russian: Sintez aktivnych sistem vibroizolacii na kosmiceskich objektach], Janus-K, Moscow.
• 15. Tondl A., P˚ust L. (2012), On the phenomenon “Parametric anti-resonnce”, Strojnick´y ˇcasopis, 63, 3, 125–137.
• 16. Tondl A. (1998), Vibration quenching of an externally excited system by means of dynamic absorber, Acta Technica CSAV, 43, 301–309.
• 17. T˚uma J., ˇSur´anek P., Mahdal M. (2014), Simulation study on the forced response of the non-stationary second order system, Proceedings of 21th Colloquium Dynamics of Machines 2014, IT AS CR, pp. 171–177, Prague.
• 18. Warminski J., Bochenski M., Jarzyna W., Filipek P., Augustyniak M. (2011), Active suppression of nonlinear composite beam vibrations by selected control algorithms, Communications in Nonlinear Science and Numerical Simulation, 16, 5, 2237–2248.
• 19. Warminski J., Cartmell M.P., Mitura A., Bochenski M. (2013), Active vibration control of a nonlinear beam with self- and external excitations, Shock and Vibration, 20, 1033–1047.