Modelling of road profiles using roughness indicators
2012 (English)Report (Other academic)
The vertical road input is the most important load for durability assessments of vehicles. We focus on stochastic modelling of the road profile with the aim to find a simple by still useful model. The proposed non-stationary Laplace model with ISO spectrum has only two parameters, and can be efficiently estimated from a sequence of roughness indicators, such as IRI or ISO roughness coefficient. Thus, a road profile can be stochastically reconstructed from roughness indicators. Further, explicit approximations for the fatigue damage due to Laplace roads are developed. The usefulness of the proposed Laplace-ISO model is validated for eight measured road profiles.
Place, publisher, year, edition, pages
Chalmers Report Preprint, ISSN 1652-9715 ; 11
Road surface profile, road roughness, road irregularity, Laplace process, nonGaussian process, power spectral density (PSD), ISO spectrum, roughness coefficient, international roughness index (IRI), vehicle durability, fatigue damage
IdentifiersURN: urn:nbn:se:ri:diva-28344OAI: oai:DiVA.org:ri-28344DiVA: diva2:1079041