Active vibration control of carbon nanotube-reinforced composite beam submerged in fluid using magnetostrictive layers

Abstract

In this article, vibration analysis of a beam-fluid coupled system was performed and then, employing magnetostrictive layers, vibration amplitude of the cantilever beam was controlled according to a closed-loop velocity proportional feedback control (CLVPFC) approach. The beam was composed of functionally graded carbon nanotube-reinforced sandwich composite (FGCNTRC) materials. The fluid was assumed to be incompressible, inviscid, and irrotational. The equation of motion of coupled fluid-structure system was solved by combining two analytical and Galerkin methods. To verify the stability and accuracy of solution procedure, convergence and comparison studies were presented. The effects of various parameters such as fluid depth, length of the beam, and distribution type of the carbon nanotubes (CNTs) on controlled and uncontrolled vibration amplitudes were investigated.

Keywords:

• Carbon nanotube-reinforced composite
• submerged cantilever beam
• vibration control
• velocity feedback
• magnetostrictive layer