Mechanical Vibrations And Shocks (mechanical Vibration & Shock) (v. 3)
by Christian Lalanne /
2002 / English / PDF
4.3 MB Download
The vast majority of vibrations encountered in the real environment
are random. By their very nature, such vibrations are complicated.
This volume describes the enabling process for simplification of
the analysis required and the analysis of the signal in the
frequency domain. Power spectrum density is defined, with
precautions needed to be taken in its calculation described
together with the processes (windowing, overlapping) needed to
improve results. A further, complementary method, the analysis of
statistical properties of the time signal, is described. This
enables determination of the distribution law of the maxima of a
random gaussian signal to be determined and simplification of
calculation of fatigue damage to be made by the avoidance of the
direct counting of peaks.
The vast majority of vibrations encountered in the real environment
are random. By their very nature, such vibrations are complicated.
This volume describes the enabling process for simplification of
the analysis required and the analysis of the signal in the
frequency domain. Power spectrum density is defined, with
precautions needed to be taken in its calculation described
together with the processes (windowing, overlapping) needed to
improve results. A further, complementary method, the analysis of
statistical properties of the time signal, is described. This
enables determination of the distribution law of the maxima of a
random gaussian signal to be determined and simplification of
calculation of fatigue damage to be made by the avoidance of the
direct counting of peaks.
