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.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.

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.
McGraw-Hill Dictionary of Architecture and Construction. Copyright © 2003 by McGraw-Hill Companies, Inc.
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References in periodicals archive ?
The deviation between the natural frequencies obtained using FEM (simulated) and the experimental method was determined using Equation 2:
Dynamic test for determining the elastic modulus of coffee fruit-stem-branch system/Ensaio dinamico para determinacao do modulo de elasticidade do sistema fruto-pedunculo-ramo
For Euler-Bernoulli beam theory, the natural frequencies can be expressed as:
Free Vibrational Response of Single-Layered Graphene Sheets Embedded in an Elastic Matrix using Different Nonlocal Plate Models
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.
Identificacion de formas modales bajo excitacion armonica usando sensores moviles
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.
Improving the Accuracy of Dynamic Vibration Fatigue Simulation
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.
Experimental Study on the Influence on Vibration Characteristics of Thin Cylindrical Shell with Hard Coating under Cantilever Boundary Condition
As can be observed, as the COP frequencies increase, the natural frequencies increase as well.
A natural frequency approach to study the blown film helicoidal stability of HDPE bimodal resins and its relation to their rheological behavior
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.
VIBRATIONAL ANALYSIS OF SUBMERGED CYLINDRICAL SHELLS BASED ON ELASTIC FOUNDATIONS
The natural frequencies of the model were carried out using [HBI.sup.1] method.
Locating defects in composite shells using modal analysis
Bridge natural frequencies changing with the scour depth: a--X direction (longitudinal direction); b--Y direction (transverse direction)
Web-based real time bridge scour monitoring system for disaster management/Internetines prieigos tilto isplovimo stebejimo realiuoju laiku sistema stichinems nelaimemes valdyti/Tiltu upes gultnes izraisitu katastrofu parvaldibas monitoringa sistema reala laika interneta/Silla uhtumise internetipohine reaalajas jargimise susteem katastroofide ennetamiseks
The natural frequencies and the mode shapes are measured for the damaged structure.
Structural damage detection based on modal parameters using continuous ant colony optimization
A damage detection methodbased on natural frequencies only needs two vibration sensors (or even one acceleration sensor) to obtain the modal frequencies.
Damage location and quantification indices of shear structures based on changes in the first two or three natural frequencies
Their ratio and the natural frequencies are different for various rubbers and for different storage and service times.
In three seconds, predict the dynamic performance of rubber

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