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Modelling of road profiles using roughness indicators
RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Sveriges tekniska forskningsinstitut, SP – Sveriges Tekniska Forskningsinstitut / Hållfasthet (BMh).ORCID iD: 0000-0002-6730-0214
Chalmers, Gothenburg, Sweden.
2014 (English)In: International Journal of Vechicle Design, Vol. 66, no 4, p. 317-346Article in journal (Refereed) Published
Abstract [en]

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 but still useful model. The proposed nonstationary 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
2014. Vol. 66, no 4, p. 317-346
Keywords [en]
road surface profiles; road irregularity; Laplace process; non-Gaussian process; PSD; power spectral density; ISO spectrum; road roughness coefficient; IRI; international roughness index; vehicle durability; fatigue damage; stochastic modelling; road profiles; roughness indicators; durability assessment.
National Category
Natural Sciences
Identifiers
URN: urn:nbn:se:ri:diva-6626DOI: 10.1504/IJVD.2014.066068Local ID: 16610OAI: oai:DiVA.org:ri-6626DiVA, id: diva2:964465
Available from: 2016-09-08 Created: 2016-09-08 Last updated: 2018-08-16Bibliographically approved

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Johannesson, Pär

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