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Solution of the problem of free and forced vibration of a discrete system with random parameters, as a model of a machine foundation, is considered.
The chapter analyzes a machine foundation consisting of a block of concrete on the surface of a layered half-space excited by a reciprocating machine, a two-cylinder compressor with cranks at 90°C.
In consideration of the dynamic load additionally generated, the design of the machine foundation is performed in the course of the following two steps.
In Korean Design Criteria, the allowable displacement width of the foundation for the high-speed rotary machine foundation is specified as maximum 0.06 mm.
In the design criteria for structure foundation, the allowable bearing capacity of single pile supporting machine foundation should be 1/2 of the static allowable bearing capacity [6].
Recently, as the demand of plant constructions and extensions are increased, it is trend that the construction demands of the vibration machine foundation forming the basis of plant facilities are being increased.
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The isolation of vibrations from the surroundings is one of the important problems in the design of machine foundations.
Ground vibrations induced by machine foundations can cause unfavourable effects on the nearby buildings ranging from annoyance to structural damage.
These are assumptions that would be generally valid for properly designed machine foundations where very small strains should be expected.
Also, different faults were experimentally simulated at different machine speeds so as to develop a reliable diagnosis technique that will be suitable for different machine foundations.
Different combinations of the initial monotonic loads and the amplitude of cyclic loads were chosen to simulate structures in which loads change cyclically such as machine foundations.
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