چكيده به لاتين
Rotational systems are fundamental components in many mechanical and industrial machines, playing a vital role in energy conversion and achieving rotational motion. Among the fundamental models used to understand the dynamics of these systems, the Jeffcott Rotor System stands out as an ideal mathematical model for studying the effects of vibrations and dynamic imbalances in rotating systems. This model provides a solid foundation for analyzing the performance of rotating systems when faced with challenges such as critical frequencies and structural disturbances.
The Jeffcott rotor model focuses on analyzing the effects of vibrations, dynamic balancing, and mass imbalance, which directly impact the performance and stability of rotating systems.
In recent years, energy harvesting from vibrations has emerged as a promising research area, particularly in applications aiming to enhance energy efficiency.
Among the techniques employed to achieve this, piezoelectric materials are distinguished by their unique ability to convert mechanical energy generated from vibrations into usable electrical energy.
Combining the Jeffcott Rotor System with piezoelectric materials presents an innovative opportunity to study the mechanisms of energy harvesting from dynamic rotational systems, paving the way for new practical applications in fields such as self-powered of the electrorheological hydrostatic journal bearing for controlling rotor vibration, sustainability, self-powered monitoring systems, and low-power devices.
The main objective of this study is harvest energy from a rotating system modeled using the Jeffcott rotor and investigate the parameters influencing the amount and frequency range of maximum harvested energy, To achieve this, the Jeffcott rotor model is simulated with different types of supports using the COMSOL software. After establishing an electrical circuit ) piezoelectric energy harvesting ) in the supports and applying a mass imbalance on the rotating disk, the transient analysis of the rotor is conducted. Subsequently, the effects of parameters such as the distance between the disk and the support, the amount of mass imbalance, the radius of the mass imbalance placement, and the rotational speed of the rotor on the harvested energy are analyzed.
