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Coupling forces in the B-triple and truck-B-double combinations: An extension of the 18868 ISO standard for D- and V-values and analysis of the normative case
Swedish National Road and Transport Research Institute, Traffic and road users, Driving Simulation and Visualization.
Swedish National Road and Transport Research Institute, Traffic and road users, Driving Simulation and Visualization. Swedish National Road and Transport Research Institute, Traffic and road users, Driver and vehicle.
Swedish National Road and Transport Research Institute, Traffic and road users, Driver and vehicle. Swedish National Road and Transport Research Institute, Traffic and road users, Driving Simulation and Visualization.ORCID iD: 0000-0002-7780-7449
EMA-QC.
2020 (English)Report (Other academic)Alternative title
Kopplingskrafter för B-trippel och Lastbil-B-dubbel-kombinationerna : En utökning av 18868 ISO standard för D- och V-värden och analys av det normativa fallet (Swedish)
Abstract [en]

The forces in the couplings of articulated vehicle combinations, propel and fully determine the path of any towed unit thus playing a significant role in the vehicle behavior. A failure in the coupling could potentially have a devastating effect if it occurs while driving in traffic. To prevent this from happening, states and road authorities impose requirements in terms of tolerated forces on any coupling selection. The current legal requirement framework is based on an ISO standard, that stipulates minimum force levels that the couplings should stand. These forces have been derived under semi-empirical assumptions for a set of five vehicle combinations. The present report aims to extend the coupling requirements to two vehicle combinations that are candidates to become legal on the public road network. Due to the semi-empirical nature of the ISO standard, validation needed to be performed. The here presented requirements for the two new combinations were validated against simulation models and checked for reasonable requirements for some example weights of the combinations. The proposed requirements are aligned with the existing requirements derived from the ISO standard. This implies that they could be used to form the legal requirements on these vehicle combinations. However, further investigations on well-grounded deduced requirements should be performed to secure safety margins.

Abstract [sv]

Kopplingskrafterna hos fordonskombinationer är de krafter som helt styr vart efterföljande fordon tar vägen. Ett brott på en sådan koppling kan därför få förödande konsekvenser om det inträffar i trafik. För att minska risken för sådana händelser, ställer myndigheter krav på bärighet hos dessa kopplingar. Det nuvarande rättsliga kravet är baserat på en ISO-standard som anger de minsta kraftnivåer som kopplingarna ska tåla. Dessa krafter har härletts utifrån semi-empiriska antaganden och explicita uttryck finns angivna för fem olika fordonskombinationer. Denna rapport syftar till att utöka kravet på kopplingskrafterna för två nya fordonskombinationer som i en framtid kan bli lagliga på det allmänna vägnätet. På grund av uttrycken i ISO-standardens semiempiriska natur, måste validering utföras. En jämförande simulering av kopplingskrafterna för de två nya samt de i ISO standarden existerande utgör en del i valideringen. En rimlighetskontroll av resultatet av uttrycken med existerande kopplingar på marknaden utgör den andra delen av valideringen. Valideringen visar att uttrycken ger rimliga krav som är i linje med vad ISO-standarden ger för existerande fordonskombinationer. Detta innebär att de kan användas som grund för framtida lagkrav för dessa fordonskombinationer. Ytterligare undersökningar av välgrundade, deducerade krav bör dock utföras för att säkerställa säkerhetsmarginaler och reducera empirin.

Place, publisher, year, edition, pages
Linköping: Statens väg- och transportforskningsinstitut, 2020. , p. 31
Series
VTI rapport, ISSN 0347-6030 ; 1031A
National Category
Vehicle Engineering
Identifiers
URN: urn:nbn:se:vti:diva-15098OAI: oai:DiVA.org:vti-15098DiVA, id: diva2:1415259
Available from: 2020-03-17 Created: 2020-03-17 Last updated: 2020-03-17Bibliographically approved

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Augusto, BrunoBruzelius, FredrikKharrazi, Sogol

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89101112131411 of 23
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