DEVELOPMENT OF CONTROL ALGORITHMS FOR VIBROACOUSTIC VIBRATIONS TO ASSESS THE SAFETY OF CRITICAL INFRASTRUCTURE STRUCTURES

Abstract

Purpose. Development of new methods and algorithms for automatic control of vibroacoustic vibrations with specified amplitude and frequency characteristics. Methods. Methods of mathematical and computer modeling of dynamic processes. Results. In emergency situations caused by earthquakes, explosions and fires, it is necessary to monitor the stability and safety of critical infrastructure facilities to assess their suitability for further operation. A decrease in the stability of buildings and structures as a result of random disturbances leads to the need to take into account the characteristics of chaotic processes. The growth of micro cracks leads to the formation of one or more main cracks, which contributes to loss of stability and destruction of building structures. For vibroacoustic monitoring of internal damage to ground structures (walls, foundations), a scientific justification has been carried out and new modeling methods have been developed taking into account the chaotic component. A software model has been developed for the exciter of vibroacoustic vibrations in a mathematical modeling environment, which is described by systems of differential equations of Lorentz and Chen. Block diagrams of generators obtained on the basis of differential equations have been constructed. An algorithm has been developed for the functioning of the vibration exciter control system in real time and with preliminary calculation of the trajectory. To maintain the stability and assessment of critical infrastructure structures, it is necessary to carry out operational monitoring, which can warn of the destruction danger. This allows you to make timely expert decisions to improve the sustainability of critical infrastructure structures. Taking into account trends in the accumulation of random damage is also an additional component for understanding the processes of building materials destruction for their early repair and restoration. Originality. Methods and algorithms for automatic control of the exciter were further developed to obtain polyfrequecy oscillations and linear waves with specified amplitude and frequency characteristics. This makes it possible to timely assess the stability of critical infrastructure buildings and increase safety during their operation. Practical implications. The developed methods and algorithms make it possible to timely assess the stability of critical infrastructure buildings and increase safety during their operation.