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Definitions (18)

1

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vibration or oscillation


Vibrations are temporal changes of state variables (e.g. path, acceleration, velocity, etc.) from an equilibrium value and a position of rest. There are different types (see also types of vibrations ) [..]
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types of vibrations


Periodic oscillation:
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vibration isolation


Vibration isolation means the decoupling of disturbance forces and vibrations. This effect can always be observed in both directions, i.e. from the engine to the environment as well as in the opposite [..]
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damping d


is the physical property of an insulator to take away energy from the oscillation system. This energy is then converted into heat. The oscillations are thereby limited to an allowed measure. Damping D [..]
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load


The type of load is important when it comes to selecting and calculating the suitable vibration isolation. This load is composed of two parts: 1. static load caused by the weight of the machine and th [..]
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frequency f


is the measure of the number of oscillations per second. The unit is Hertz (Hz).
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natural frequency = resonance frequency


is the frequency at which the vibrating body oscillates freely about its position of equilibrium after a singular excitation.
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excitation or disturbance frequency


is the frequency at which the system is excited in the case of a forced vibration. Often it is equal to the engine speed or stroke rate.
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matching ratio


The ratio between excitation and natural frequency is called matching ratio. In general, it is true that the effectiveness of vibration isolation rises as the natural frequency of the isolator drops, [..]
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resonance / resonance amplification


If the natural frequency is close to the excitation frequency or even equal to (damping ratio = 1), it is called resonance. The oscillating system consisting of machine and isolator reacts with partic [..]
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