Natural and Fundamental Frequencies

[duoheer]

How could you tell if you had missed one of the natural frequencies when you were finding natural frequencies above the fundamental? thnx a lot

 

[SGT]

How could you tell if you had missed one of the natural frequencies when you were finding natural frequencies above the fundamental? thnx a lot

Natural frequencies and fundamental frequency are different concepts. Natural frequencies are characteristics of linear systems and are associated with the transient behaviour of the system.
Fundamental and harmonic frequencies appear in the steady state of a linear system excited by a non sinusoidal periodic waveform (like a square wave) or a nonlinear system excited by a sinusoid.

 

[charng]

Natural and fundamental frequencies are important concepts in the field of physics and engineering. Natural frequencies refer to the specific frequencies at which an object or system naturally vibrates or oscillates. These frequencies are determined by the physical properties and geometry of the object or system.

The fundamental frequency, also known as the first harmonic, is the lowest natural frequency of an object or system. It is the frequency at which the object or system vibrates with the highest amplitude.

When finding natural frequencies above the fundamental, it is important to make sure that all the natural frequencies have been identified. One way to check for missed frequencies is to compare the calculated frequencies with the expected range of frequencies based on the physical properties of the object or system.

Another way to check for missed frequencies is to perform a modal analysis, which involves exciting the object or system at different frequencies and observing its response. This can help identify any missing frequencies that were not captured in the initial calculations.

Additionally, it is important to ensure that the calculations and measurements are accurate and precise. Any errors in the measurements or calculations can lead to missed frequencies.

In conclusion, to determine if a natural frequency has been missed when finding frequencies above the fundamental, one should compare the calculated frequencies with the expected range and perform a modal analysis to confirm the results. It is also crucial to ensure the accuracy and precision of the measurements and calculations.