IDENTIFICATION OF PARAMETERS CHARACTERIZING THE NONLINEAR BEHAVIOR OF VISCOUS-ELASTIC SYSTEMS ON DYNAMIC LOADINGS

摘要

There are situations when certain mechanical systems or buildings may be damaged or destroyed in case of external dynamic loadings from human activities or due to natural hazard (seism). A measure to counteract these negative consequences is including in the mechanical system or to exposed dynamic loadings construction, of some systems for isolation and damping oscillatory movements, such as viscous-elastic systems. These viscous-elastic systems, by prolonged exposure to atmospheric factors and claims arising from anthropogenic environment, change their specific operating parameters leading in certain situations to uncontrolled movements that cannot be anticipated. This situation corresponds to behaviour nonlinear of viscous-elastic system, elastic and damping forces having nonlinear expressions. This paper aims to identify parameters capable of indicating the point from which the viscous-elastic system has a changed behaviour as a nonlinear kind.