Effectiveness of vibration isolation for a power generator

The subject of this paper is the research conducted on the vibrations of a power generator’s vibration isolation system in terms of its effectiveness and potential application to other types of dynamic objects, such as rail or road transport. The vibration measurements of the isolation system indicate that the effectiveness of vibration isolation, defined in our case as the ratio of acceleration amplitudes above and below the vibration isolator, which serves as a measure of the quality of the vibration isolation, is not the only parameter that should be taken into account when designing and selecting this type of elastic system, especially for other types of dynamic objects or transport. The work was carried out as part of research project 4875/B/TO2/2010/38.Vibrations of a power generator foundation are most often caused by rotor mass imbalance, but the rotating magnetic field also plays a significant role in generating these vibrations. The excitation frequency resulting from the generator’s rotational speed of 3000 rpm is 50 Hz, while that from the rotating magnetic field is 100 Hz, in the case of the two-pole generator on which the assessment of the effectiveness of the applied vibration isolation of the generator from the foundation was conducted. The task of vibration isolation is to limit dynamic impacts on the environment, and its effectiveness is defined in our case as the ratio of acceleration amplitudes above and below the vibration isolator. (…)

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