An experimental and numerical comparison of traditional spring DVA in parallel and shape memory alloy actuated DVA in series and parallel for fixed beam vibration control

Abstract

Shape memory alloy is a desirable smart material that could be used as a stiffness adjustment component in dynamic vibration absorbers (DVA). This research provides an analytical and experimental framework for investigating a stationary beam's vibration powered by a mixture of three SMA springs in series and two in parallel. In order to reduce vibration from a stationary beam, DVA, which is supported by springs composed of shape-memory alloy, is developed. In this study, a fixed beam in the system is held in place by a nut and bolt arrangement. The shaker is used with a function generator to provide vibration in real time. After installing two conventional springs with masses 305.1 mm apart from the fixed beam's ends, the vibration amplitude was measured. Experiments were carried out at various frequencies with three SMA springs with masses in series and two in parallel in place of the conventional springs. The results were recorded using Pulse software, which interfaced with the FFT and accelerometer. According to the experimental arrangement, the system was adequately dampened. Harmonic response analysis results were compared over a range of frequencies using ANSYS Workbench R15.0 to simulate the fixed beam spring-mass mass system.