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2. Dynamic impedance and transfer functions
2.1 Impedance representation
This observation of linearity has a considerable benefit: it allows us to represent the vibratory response of any solid subject to vibratory excitation using an impedantial formulation; This formulation expresses the relationship between forces (and moments) and vibratory displacements (or velocities, or accelerations) from an "input" section (notion of source) to an "output" section (notion of receiver) linked to each other by a "transfer path", using "transfer matrices" that are independent of amplitude (and therefore dependent only on frequency) between sources, transfer paths and receivers.
The sources are usually machines transforming energy (electrical, thermal, hydraulic or pneumatic) into mechanical work (circular or reciprocating...
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Dynamic impedance and transfer functions
Mass-spring diagrams
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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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