A Resonant Damping Study Using Piezoelectric Materials

Abstract

Excessive vibration of turbomachinery blades causes high cycle fatigue (HCF) problems requiring damping treatments to mitigate vibration levels. Based on the technical challenges and requirements learned from previous turbomachinery blade research, a feasibility study of resonant damping control using shunted piezoelectric patches with passive and active control techniques has been conducted on cantilever beam specimens. Test results for the passive damping circuit show that the optimum resistive shunt circuit reduces the third bending resonant vibration by almost 50%, and the optimum inductive circuit reduces the vibration by 90%. In a separate test, active control reduced vibration by approximately 98%.

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

“…Researchers at NASA GRC also carried out the design and implementation of an experimental system that utilized stator vane mounted piezoelectric actuators to control fan-stator interaction noise in a simulated turbo-fan engine [8]. More recently, a resonant damping study using shunted piezoelectric patches on plate specimens was conducted [9][10][11], wherein the shunted piezoelectric circuit damping finite element (FE) models were developed using Ansys Multiphysics software incorporating a method developed by Allick and Hughes [12] for the resistive and inductive circuit piezoelectric simulations. A frequency-switching concept for avoiding resonant response in blades was also introduced and a significant amplitude reduction was reported [13].…”

“…Further, there is the risk of rotor imbalance with operation at high centrifugal loads. Therefore, our effort at GRC has been to investigate the effectiveness of a digital code shunt circuit technique [11] using the subscale rotor blade specimens in the GRC Dynamic Spin Rig Facility [15].…”

Shunted Piezoelectric Vibration Damping Analysis Including Centrifugal Loading Effects

“…Some earlier test and analysis work conducted at GRC on the piezoelectric beam specimens is described [7]. Passive and active resonant damping control results showed that shunted piezoelectric damping control techniques have a great potential to reduce plate vibrations under centrifugal loading at room temperature.…”

“…Several damping methods have been investigated by NASA researchers at Glenn Research Center (GRC) for use in aircraft engine blades, including viscoelastic damping [2], impact damping [3,4], plasma sprayed damping coatings [5], and high-damping high-temperature shape memory alloy materials [6]. Piezoelectric dampers have also been explored as a solution for damping treatment [7][8][9]. Smart piezoelectric damping technology could alter the dynamic behavior of a structure intelligently to achieve reduced hazardous vibration and associated dynamic stresses, increased life, and enhanced damage tolerance.…”

Piezoelectric Vibration Damping Study for Rotating Composite Fan Blades

“…Some earlier test and analysis work conducted at GRC with piezoelectric beam specimens is described (Ref. 16). Our expanded research using plate specimens under centrifugal loading conditions at room temperature showed that shunted piezoelectric damping techniques have great potential to reduce plate vibrations under a centrifugal load (Refs.…”