Session: MNS-01-01: Dynamics of MEMS/NEMS 1st Session

Paper Number: 89969

89969 - Experimental Analysis of Flexural-Torsional Forced Vibrations of A Piezoelectric Double-Cantilever 

In this paper, the experimental coupled flexural-torsional forced vibration of a piezoelectric double-cantilever structure is studied and compared with analytical results. The structure of interest consists of two uniform and identical Euler-Bernoulli cantilever beams that are connected by a rigid tip connection at their free ends. Each of the cantilever beams can be excited by a piezoelectric layer attached on its top surface. The time response to the forced vibrations of the structure induced by the piezoelectric actuators is found using the Galerkin approximation method. The effects of dimensional parameters, the length of the cantilever beams and the length of the tip connection, as well as the piezoelectric input voltage on the coupled flexural-torsional amplitude of the vibrations of the structure are studied analytically and experimentally. The amplitude of the coupled flexural-torsional vibrations of the structure is observed to be proportional to the piezoelectric input voltage. However, the slope of the curves defining this relationship depends on dimensional parameters. For a constant input voltage, the effect of either of the dimensional parameters on the amplitude of vibrations is dependent on the other dimensional parameter such that a turning point, whose location is dependent on the configuration of the structure, exists in all the curves.

Presenting Author: Nima Mahmoodi The University of Alabama

Presenting Author Biography: Nima Mahmoodi is an associate professor in the department of mechanical engineering at the University of Alabama. He has received the B.S. degree in mechanical engineering from Iran University of Science and Technology, in 1998 and the M.S. degree in mechanical engineering from Tarbiat Modarres University in 2000. He has received his PhD in mechanical engineering from Clemson University, South Carolina in August 2007. From 2008 to 2010, he was a visiting assistant professor in the Center for Vehicle Systems and Safety at Virginia Tech. His research interests include nonlinear vibrations and control with application to MEMS and NEMS, piezoelectric-based actuator and sensors, and automation.

Authors:

Anahita Zargarani The University of Alabama
John O'donnell The University of Alabama
Nima Mahmoodi The University of Alabama