Shunted piezoelectrics for passive control of turbomachine blading flow-induced vibrations

Abstract

The application of shunted piezoelectric elements to provide passive structural damping is investigated by means of a series of experiments performed in the Purdue Annular Cascade Research Facility. An array of piezoelectric elements is bonded to an airfoil in the stator row. This airfoil is excited in a chordwise bending mode by the wakes generated by an upstream rotor. As the wakes drive the airfoil vibrations, the piezoelectrics experience a strain and in response produce an electric field. Tuned electrical circuits connected to the piezoelectrics as shunts dissipate this electrical energy, with multiple shunting techniques utilized. This electrical energy dissipation and the corresponding reduction in the airfoil mechanical energy result in a reduction in the magnitude of the resonant vibrations.

Optimization of Shunted Piezoelectric Patches for Vibration Reduction of Complex Structures: Application to a Turbojet Fan Blade

“…Les applications concernent, en grande majorité, la réduction des phénomènes de flottement, que cela soit en actif [114,87,124] ou semi-passif/passif [37,9]. Elles portent sur le contrôle de pâle d'hélico-ptère, d'aile [94], d'aileron [114], de volet [124] ou d'une partie d'un fuselage.…”

Numerical modeling methodology and experimental study for piezoelectric vibration damping control of rotating composite fan blades

“…Cross and Fleeter [6] investigated the application of shunted piezoelectric elements to provide passive damping to control flow-induced vibrations of chordwise bending mode in a low-aspect-ratio stator vanes. Piezoelectric networks have also been studied for reduction of mistuned blade vibration levels through blade coupling [7].…”

“…However, a major problem with this approach is the large inductor size and mass for low frequencytuned resonant circuit. Consequently, many researchers proposed the use of synthetic inductors [6] to reduce the weight and volume of the circuits. It required a constant power supply, and its size was still considerably large.…”

Shunted Piezoelectric Vibration Damping Analysis Including Centrifugal Loading Effects

“…Livet [14] examined negative capacitance shunted piezoelectric materials on beams for turbomachinery blade application. Cross and Fleeter [15] tested shunted piezoelectric damping on stator vanes. Piezoelectric networks have also been studied for reduction of mistuned blade vibration levels through blade coupling [16].…”