Vibration Characteristics of Rotating Sandwich Beams Filled with Electrorheological Fluids

Dynamic modeling and vibration characteristics of a rotating sandwich beam filled with an electrorheological (ER) materials layer are investigated in this study. The stress—strain relationship for the ER fluids is described by a complex shear modulus using linear visco-elasticity theory. A dynamic equation of the rotating ER beam is derived based on Hamilton's principle. The coupling and nonlinear equation is discretized and solved by the finite element method (FEM). The influence of various electric field strengths and rotating speeds on the natural frequencies and damping loss factors of the rotating ER beam are presented. The amplitudes of vibration at different operation conditions are compared. The results obtained indicate that significant vibration attenuation is achieved as the electric field is increased at different rotating speeds, and demonstrate the feasibility of using the ER fluids to control the vibration of the rotating beam.

[1]  Taro Nakamura,et al.  Impedance Control of a Single Shaft-Type Clutch Using Homogeneous Electrorheological Fluid , 2002 .

[2]  Seung-Bok Choi,et al.  A New Generation of Innovative Ultra-Advanced Intelligent Composite Materials Featuring Electro-Rheological Fluids: An Experimental Investigation , 1989 .

[3]  E. Fung,et al.  Vibration characteristics of a rotating flexible arm with ACLD treatment , 2004 .

[4]  Kartik Venkatraman,et al.  Vibration control of sandwich beams using electro-rheological fluids , 2003 .

[5]  Li Quanlu.  Research into an integrated intelligent structure— A new actuator combining piezoelectric ceramic and electrorheological fluid , 2002 .

[6]  Jean-Claude Samin,et al.  Comparison of Various Techniques for Modelling Flexible Beams in Multibody Dynamics , 1997 .

[7]  John P. Coulter,et al.  Analytical Modeling of Electrorheological Material Based Adaptive Beams , 1995 .

[8]  Yuji Matsuzaki,et al.  Vibration control by smart structure with electrorheological fluid , 2001, SPIE Smart Structures and Materials + Nondestructive Evaluation and Health Monitoring.

[9]  John P. Coulter,et al.  Electrorheological Material Based Adaptive Beams Subjected to Various Boundary Conditions , 1995 .

[10]  Chung-Yi Lin,et al.  Dynamic stability of a rotating beam with a constrained damping layer , 2003 .

[11]  Norman M. Wereley,et al.  Transient analysis for damping identification in rotating composite beams with integral damping layers , 1996 .

[12]  Roger Stanway,et al.  Vibration control using smart fluids : A state-of-the-art review , 1999 .

[13]  Amr M. Baz,et al.  Vibration control of rotating beams with active constrained layer damping , 2001 .

[14]  Christopher D. Rahn,et al.  Modeling and Control of an Electrorheological Sandwich Beam , 1998 .

[15]  Seung-Bok Choi,et al.  Vibration characteristics of hollow cantilevered beams containing an electro-rheological fluid , 1993 .

[16]  Kexiang Wei,et al.  Fluid Power Control Unit using Electrorheological Fluids , 2004 .

[17]  Lim Mong King,et al.  Vibration Characteristics of Sandwich Beams Partially and Fully Treated with Electro-Rheological Fluid , 1997 .

[18]  Seung-Bok Choi,et al.  Passive and active damping characteristics of smart electro-rheological composite beams , 2001 .

[19]  Guo-Ping Cai,et al.  Model study and active control of a rotating flexible cantilever beam , 2004 .

[20]  Norman M. Wereley,et al.  Double Adjustable Shock Absorbers Using Electrorheological Fluid , 1999 .