DefinePK

Abstract

Dynamic Vibration Absorber (DVA) consisting of a simple mass-stiffness mechanism has typically been designed to attenuate excessive vibrations in machines and structures operating at or near their resonant frequencies. This undamped DVA, namely the auxiliary system, helps to reduce the amplitude of the main system by creating the anti-node and theoretically lags 180: of the excitation force in order to suppress the vibration amplitude of the main system. DVA demonstrates unused and wasted energy that can potentially be harvested for other purposes. Energy harvesting from the vibration object, which in this case is the DVA, is a technique used to convert unwanted vibrations into electrical energy. This paper will address the effect of the DVA parameters chosen on the basis of the Randy Fox Method (RFM) and its effectiveness will be experimentally tested. The piezoelectric transducer is mounted on the DVA and the energy produced in the form of the generated voltage is measured at different widths of 30 mm, 40 mm and 50 mm for three different tuned mass positions. The experimental results reveal that a single piezoelectric transducer can generate up to 40 millivolts at an operating frequency that excites the original natural frequencies of the main system. It is observed that with the proper selection of parameters, the vibration amplitude of the main system is attenuated effectively along with the sufficient energy that can be harvested.