Sine testing is used primarily to determine damage to structures. Part of the usefulness of sine testing is its simplicity, so it is a good point of entry into the study of vibrations. These frequencies are important to the vibration testing engineer because they are the frequencies at which the DUT vibrates with the greatest amplitude and, therefore, may be the most harmful to the DUT.īecause “real-world” vibrations are not sinusoidal, sine testing has a limited place in the vibration testing industry.
The vibration testing industry has made good use of sine vibrations to help assess the frequencies at which a particular device under test (DUT) resonates. Therefore, sinusoidal vibration testing is important to help understand how any structure vibrates naturally. Every structure can vibrate and has particular frequencies (resonance frequencies) in which it vibrates with the greatest amplitude.
Sine waves are important in more areas than music. More complicated musical sounds arise from overlaying sine waves of different frequencies at the same time. The simplest musical tones are sine waves at particular frequencies. Strike a tuning fork and the sound you hear is the result of a single sinusoidal wave produced at a particular frequency (Fig 1). Note its repeatability and predictability.
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