Free Oscillations

Free Oscillations

 

(or natural oscillations), oscillations that occur in a mechanical, electrical, or some other physical system, in the absence of an external influence, owing to the originally accumulated energy (as a result of an initial displacement or initial velocity). The character of free oscillations is determined primarily by the system’s intrinsic parameters, such as mass, inductance, capacitance, or elasticity. In real systems, free oscillations are always damped because of energy dissipation; when the losses are large, the oscillations become aperiodic. (SeeOSCILLATIONS.)

References in periodicals archive ?
After the 1960 Great Chilean earthquake, which remains the largest earthquake ever recorded by seismic instruments, the first observation of the Earth's free oscillation was reported in the memorial paper "Excitation of the free oscillations of the earth by earthquakes".
The aim of ATUNE is to develop novel full-spectrum techniques and apply them to Earth~s long period free oscillations to observe global-scale regional variations in seismic attenuation from the lithosphere to the core mantle boundary.
The sensors that operate on the principle of non-contact measurement are used to measure the free oscillations of console instruments and forced oscillations during the cutting process.
These parameters were determined by filing of the free oscillations of model of a platform on quiet water.
Control of the process of vibro-treatment of the construction was developed using registration of logarithmic decrement of free oscillations of constructions after impact has been applied.
2006A, Earth free oscillations observed in plumb line variations from the 26 December 2004 Earthquake.
Gilchrist [3] analyzed the free oscillations of conservative quasilinear systems with two degrees of freedom.
Thus, the frequency of free oscillations in such an oscillating circuit is [[omega].
The symbols 1T and 2T mean the characteristic of the period of free oscillations dependent on period [T.
Figure 6 shows free oscillations in the time domain of the beam base (320 kHz with amplitude of 1 nm), the beam free end, and the CD tip end.
Fairly strong seismological confirmation of the existence of a solid inner core came in 1960, albeit in an unsuspected form: free oscillations of the earth brought about by a major earthquake in Chile on 22 May.
The discovery of the new-found phenomenon came from studies of Earth's so-called free oscillations, the same kinds of vibrations that ring out from a bell.