Elite Consulting undertakes theoretical vibration analysis (also called Dynamic Analysis) to determine the likely amplitude of vibration under certain conditions and the resulting stresses.
The first step is to conduct a Modal Analysis to find the natural frequencies and mode shapes of vibration. Then these results are used to find the amplitudes by appling a forcing function and damping to the system and conducting a forced vibration or 'dynamic' analysis. Often the stress results are used as the basis of a fatigue analysis.
We undertake 4 different types of Dynamic Analysis:-
This simulates a sweep through a frequency range, where the input may not be uniform within that range. Usually this is done in 2 stages - an initial stage to find the peak response frequencies and then a second stage to examine the amplitudes and stresses at the peaks in more detail.
This simulates a system that is subject to a specified time-related input, such as a half-sine wave (though the input could be of any shape). In common parlance this is often call a 'shock'. This is also usually done in 2 stages - an initial stage to find the times at which peak response occurs and then a second stage to examine the amplitudes and stresses at the peaks in more detail.
Example - Initial Dynamic Time Result
This type of analysis is undertaken where the input is random; often described by a Power Spectral Density (PSD). It is a common type of analysis in the automotive and aerospace industries, though it can be appropriate in other industries too.
This term is used to describe a special kind of analysis that is usually used to analyse earthquake-like situations. It uses the frequency-response spectrum method to produce a result.
If you wish to discuss Vibration Analysis and which kind of input and analysis would be most approriate in your situation, then please contact us.
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