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5. Energy methods
5.1 Principle of the different energy methods
The approaches mentioned above (mass-spring diagrams, finite element calculations) are all deterministic, in the sense that they aim to precisely characterize the vibratory state of a structure at a given instant.
In general, this information is more detailed than the engineer would like: in the end, it doesn't matter what the precise frequency of the modes is (which is usually fraught with uncertainty), he just needs to determine an overall vibration level characteristic of a given operating state.
It is therefore interesting to reason in terms of energy flow between the various components of the structure. This eliminates the need for a point-by-point description of vibrations, while focusing...
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Energy methods
Reduced-scale modeling approach
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Bibliography
Norms and standards (non-exhaustive list)
- Vibration and shock – Experimental determination of mechanical mobility – Part 1: Basic definitions and transducers - ISO 7626-1 - 1986
- Acoustics – Characterization of structure-borne noise sources to estimate the noise radiated by the structures to which they are attached – Velocity measurement at contact points on elastically mounted machines - ISO 9611 - 1996
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