Modeling and Optimization of Vibration Absorber Beam Combined with Magneto-Electro-Elastic Energy Harvester

Mechanical structures are always exposed to unwanted vibrations and this can greatly affect system performance. The energy from this vibration can be used as a source to generate voltage. Therefore, the use of a vibration absorber that can minimize the vibrations of the structure and at the same time be used as an energy harvesting has been very important. In recent years, the use of intelligent materials capable of generating voltage has made significant progress in various fields. In the present study, a continuous beam with a layer of magnetoelectroelastic materials has been used as a dynamic absorber. This absorber helps to reduce the vibrations of the system by one degree of freedom and extracts energy from it. The best performance of this absorber will occur at the resonant frequency. The general absorber equations were extracted and the effect of different beam parameters on energy harvesting was investigated. Using the optimization method, appropriate values were obtained to achieve both goals. The studies were performed in the first three modes of the Bernoulli Euler beam. the highest energy harvesting occurred in the first mode and in the frequency range of 10 to 40 Hz. The vibrations of the main structure also decreased by about 65%.