Research On Omnidirectional Eddy Current Tuned Mass Damper Used For Vibration Reduction

With the rapid development of economic society, many high-level, high-rise buildings have been built, which provide great convenience for people’s life. It cannot be ignored that it is easily be caused resonance about such a super large building caused by outside the excitation such as wind or earthquake. It causes the damage of building structures and poses a threat to people’s life and safety. Therefore, it is necessary for people to solve the problem under the influence of external vibration force. Omnidirectional eddy current tuned mass damper, as a new type of damper can effectively slow down from all directions exciting force caused by the resonance, it through the vibration of the structure to translate into rotation, and will produce distributed energy in the form of heat, to achieve the purpose of reducing vibration. This damper device has the characteristics of simple structure, safe and reliable, fundamentally, it solves the questions of traditional tuned mass damper with damping and stiffness having influence each other, poor sealing, and parameters cannot be adjusted accurately, greatly improving the damping ratio, save the cost.At present, as a edge vibration reduction technology, eddy current damping technology is in the initial stage in domestic, this topic research content is to optimize the design of omnidirectional structural parameters of eddy current damper by using Ansys finite element analysis technology,verify the effection of the damper damping.This topic directs at the current some problems of the tuned mass damper, eddy current principle is proposed for vibration reduction, analyzing the status of the current eddy current damper for vibration reduction. First, proposing the preliminary structure of damper, the stress condition is analyzed under free vibration and forced vibration of rotating rotor of damper. Analyzing and calculating the mechanics characteristics of damper through establishing the dynamic equations of motion. Carrying through dynamic simulation analysis of the mechanics characteristics of damper according to the calculation results, researching the vibration displacement response of the eccentric mass under the exciting force. Damper axis is put forward according to the eccentric mass in the rotary motion, to establish equation of motion according to the mechanical structure, through the analysis and comparison, puting forward to the solutions of avoiding ortex axis. With the help of Ansys finite element analysis software and FEMM electromagnetic field analysis and Simulink platform, carrying through the optimization analysis of magnetic induction intensity around the damper plate conductor magnetic induction intensity. According to the structural parameters optimization of damper, the eddy current dampe is designed by Pro/E software, Carrying through simulation by vibration simulation platform, through data analysis and comparison, verifying the damping effect of the eddy current damper is good.The focus of this study is based on the full stress simulation to the eddy current damper structure, optimizing the structure parameters and improving the effect of damper, establishing the foundation for enter into engineering practice about the damper in future.