A Combined Structural and Electromechanical Approach for Vibration Attenuation of Rotating Beam

Research Area: Volume 5,Issue 1, Jan. 2016 Year: 2016
Type of Publication: Article Keywords: Piezoelectric, Periodic Structure, Transfer Matrix, Rotating Structure
Authors:
  • Ali Gerami
  • Majid Dousti
  • Saeid Dousti
Journal: IJEIR Volume: 5
Number: 1 Pages: 107-113
Month: January
ISSN: 2277-5668
Abstract:
Piezoelectric materials (PZT) have been used in the past to reduce the vibration in several different applications. This paper takes a combined structural and electromechanical approach to reduce the vibration amplitude of a rotating cantilever beam. This yields to a coupled electro-mechanical system, wherein displacement variables are coupled via electric field. Due to the rotation of the beam, the centrifugal stiffening effect is also included in the derivation. A linear partial differential equation is derived from the Hamilton’s principle, which later solved to study the natural frequencies and the tip response of the beam. Several parametric studies including rotational speed of beam, beam thickness, hub radius and shunt resistance were also conducted. A resistive circuit was later connected to the piezoelectric pieces in series and was tuned to reduce the vibration in a wide frequency range. A good broadband vibration reduction was achieved by tuning each shunted circuit to a different target frequency.

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