natural frequency

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natural frequency

[′nach·rəl ′frē·kwən·sē]
(electronics)
The lowest resonant frequency of an antenna, circuit, or component.
(physics)
The frequency with which a system oscillates in the absence of external forces; or, for a system with more than one degree of freedom, the frequency of one of the normal modes of vibration.

natural frequency

One of a number of frequencies at which a system or object tends to vibrate if subject to a mechanical displacement or impact and then allowed to vibrate freely.
References in periodicals archive ?
The deviation between the natural frequencies obtained using FEM (simulated) and the experimental method was determined using Equation 2:
The first step for the use of the proposed methodology in a full scale implementation would be the identification of the natural frequencies using a standard identification procedure.
In parallel to this experimental activity, an FEA-based modal analysis was performed using a more refined 3D model in order to identify the theoretical natural frequencies and mode shapes.
Finally, repeat the above steps, and the natural frequencies and mode shapes of cantilever cylindrical shell with and without hard coating can be gradually calculated out based on the self-written Matlab program, which are listed in Table 3.
Powerful mathematical tool MATLAB has been utilized to extract natural frequencies and mode shapes of the cylindrical shell for certain material as well as physical parameters.
The natural frequencies of the model were carried out using [HBI.sup.1] method.
The natural frequencies and the mode shapes are measured for the damaged structure.
A damage detection methodbased on natural frequencies only needs two vibration sensors (or even one acceleration sensor) to obtain the modal frequencies.
Their ratio and the natural frequencies are different for various rubbers and for different storage and service times.