# 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:
Figure 1 shows the simulated acceleration res-ponses of a moving sensor at a constant velocity of v=3 m/s when the structure is excited with a sinusoidal load with a frequency equal to the 1st and 5th natural frequencies.
It is recommended to validate the modal behavior of the FE model by comparing the analytical natural frequencies and mode shapes with those measured experimentally.
In the computation of vibration, the natural frequencies are highly depend on mass distribution, and following masses must be taken into account:
While it is difficult to obtain the natural frequencies at the higher mode due to the sampling rate of smartphone camera, the frequency components including the natural frequency of the first mode were estimated accurately at the lower vibration mode.
The experimental natural frequencies of different vibration modes are listed in Table 2 for comparison.
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.
A damage detection methodbased on natural frequencies only needs two vibration sensors (or even one acceleration sensor) to obtain the modal frequencies.

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