Many factors have to be taken into account when a foundation is designed for a machine. In particular for rotating machinery, such as pumps, blowers or turbines, a knowledge of the vibrational characteristics of a foundation is of great importance [l],. In this chapter, the principles of the design of a foundation subject to dynamic loading are introduced and discussed with reference to simple mass-spring systems. The use of undamped and damped dynamic absorbers is considered and finally an analysis is described in which the finite element method is used to predict the dynamic behaviour of turbine foundations.
KeywordsCritical Speed Transmitted Force Mechanical Impedance Freedom System Rigid Base
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