Methodology and Constructive Implementation of Active Vibration Protection of Large-Scale Structures

摘要

It is advisable to implement active vibration protection by structures; those include one spatial dimension with the value, which exceeds the values of other two spatial dimensions. The proposed vibration protection method is based on the oscillation generation that leads to growing frequencies of large-scale structures (LSS). The rise of frequency shifts the natural frequency of LSS oscillations in relation to the disturbing frequency; at the same time, there is an increase in the frequency and decrease in the amplitude that allow getting away from the resonance. Another vibration protection method is oscillation generation, which coincides with damped LSS frequencies but is in the antiphase with them. The main task on the development of active vibration protection is exclusion from designs mechanical oscillators and moving mechanical elements, solution of the problem is the use of the ferromagnetic fluid volume as an oscillator. Constructive implementation of such active vibration protection device with a ferrofluid (FF) oscillator is considered in this research paper. The principle of operation of the device is based on the oscillation generation and on the change of the electromagnetic component value of pressure in the ferromagnetic fluid by pulsed electromagnetic fields and on imparting oscillatory trajectories to magnetic particles in the vortex electromagnetic fields too.