9. Assessment

Mechanical oscillation represents the undesired factor with negative effect upon almost any equipment with its environment. A long-term effect of oscillation upon the systems of structural complexes causes shortening of the service life and increasing of noise level. Diverse literatures and standards list limit values of two parameters of vibrations, i.e. speed and acceleration of vibration amplitudes. They specify the amount by which the value of vibrations can increase in contrast to initial value yet only a few technical devices dispose of definitions of these values. By means of the configuration of theoretical knowledge and by means of performance of experiments, it was partially achieved. The formed frequency spectra and their consequent analysis define the initial state and represent a suitable basis for defining the boundary which the values of vibration sizes cannot exceed. Pursuant to description and analysis of the present state of cognition and solutions focused on operation of production system with the water jet technology, the monograph “XZ” updates current knowledge and solutions by new information in the sphere of research and the application of the sieve analysis of abrasive in relation to origin and magnitude of acceleration amplitudes of technological head vibrations.