Klas Bogsjö presenterar sin licentiatavhandling
	
Title:
Stochastic modelling of road roughness

Abstract:

Road profiles are studied from a vehicle fatigue perspective. Roads
ranging from smooth motorways to very rough gravel roads have been
measured. It is observed that the measured roads consist of irregular
sections, which makes the stationary Gaussian model unsuitable in this
application (Paper A). In Paper B, it is verified that irregular
sections cause the major part of the fatigue damage. An algorithm is
presented which automatically identifies the irregularities. Based on
this result, a new model is proposed, which includes randomly shaped
and placed irregularities. Paper C describes a new method for road
model evaluation. The method facilitates simple comparison of road
model accuracy. Also, the method defines a target which makes it
simple to reject or accept models.