GENERALITES
Section outline
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Vibratory phenomena deal with the oscillations of mechanical systems, which are well known for their significant importance in the field of physics. For example, the vibratory phenomenon that can affect civil engineering systems and structures is the earthquake. Indeed, physical quantities (displacement, velocity, angular frequency, etc.) are time-dependent variables. They are studied through the behavior of systems with one or multiple degrees of freedom, whether free or forced, and in the presence or absence of damping.
In the “vibrations” section, the systems studied are characterized by equations of motion of the type: linear differential equations. This makes it possible to describe various important characteristics of vibrations.