DYNAMIC LOADS IN AUTOMOTIVE SUSPENSION

摘要

Amplitude and frequency structure of vertical loads in auto-motive suspension is quite similar, irrespective of the method used to determine them (measurement of forces, deformations of the end of master leaf, suspension deflections, accelerations of car body over the suspension spring), The observed suspension loads are stationary processes of normal distribution. Vibrations of car body play a dominant role here, causing the most significant changes in the level of loads in the suspension. The realisations of forces, transformed into equivalent amplitude spectra, give a good base for fatigue life estimation. However, mutual relations between the statical characteristics determined from load realisations and the results of fatigue life calculations depend on the accepted hypothesis of fatigue failure cumulation. Characteristic features of the load functions, pointed out in this work, might have a decisive significance in constructing a mathematical model of automotive suspension. The analysis of the possibility of reliable reconstruction (during tests on a model) of the state of loads in automotive suspension in operating conditions will be the subject of a separate publication.