文档介绍：ARTICLE IN PRESS
JOURNAL OF
SOUND AND
VIBRATION
Journal of Sound and Vibration 300 (2007) 176–196
ate/jsvi
Vibration control of pre-twisted posite thin-walled
beams with piezoelectric posites
Seung-Chan Choi1, Jae-Sang Park, Ji-Hwan KimÃ
School of Mechanical and Aerospace Engineering, Seoul National University, Institute of Advanced Aerospace Technology,
San 56-1, Sillim-Dong, Gwanak-Gu, Seoul 151-742, Republic of Korea
Received 17 January 2005; received in revised form 7 July 2006; accepted 24 July 2006
Available online 21 November 2006
Abstract
posite beam structures like blades are applied in many fields of aerospace and mechanical engineering. In
this research, bending vibration control of the pre-twisted posite thin-walled beam is studied. The formulation
is based on single posite beam including a warping function, centrifugal force, Coriolis acceleration, pre-twist angle
and piezoelectric effect. A negative velocity feedback control algorithm is applied to realize the adaptive capability of the
beam. Using a finite-element method, numerical simulations show that macro-posite (MFC) actuators which are
piezoelectric posites and PVDF sensors can generate active vibration control effect. Relations between active
vibration control effect and design parameters of beams such as rotating speeds, pre-twist angles and fiber orientations in a
host structure are investigated in detail. Besides, a case study conformed that the effective damping performance can be
obtained by suitable arrangement and distribution of the sensor and actuator pairs.
r 2006 Elsevier Ltd. All rights reserved.
1. Introduction
Thin-walled beams are applied in many fields of aerospace and mechanical industry. Helicopter blades, tilt-
rotor aircraft blades, flexible robot arms and wind turbines are representative examples of structures that have
the shape of a thin-walled beam. Recently, composite materials have been widely used in these structures,
obtaining an