Vibration Absorption and Isolation in Dynamically Loaded Foundations

Abstract eng:
Machine foundations are known as dynamically loaded foundations built with reinforced concrete, in general. The design of a machine foundation is more complex than of a foundation which supports only static loads. In machine foundations, the designer must consider, in addition to the static loads, the dynamic forces caused by the working of the machine and seismic effects. The occurence of resonance and the consequent effect on increase of vibration amplitudes is one of the most common sources of trouble in machine foundations. The possible methods of vibration isolation in existing machine foundations are counter-balancing the exciting loads, stabilization of soils, use of structural measures, isolation by trench barriers, isolation in buildings. This study includes basic principles of vibration absorption and isolation, introducing of common vibration absorbers, the design procedure for foundation on absorbers, design principles of vibration isolation with wave barriers, methods of reducing vibration amplitudes in existing machine foundations.

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