This paper provides an overview of the latest advances in road vehicle suspension design, dynamics, and control, together with the authors' perspectives, in the context of vehicle ride, handling, and stability. The general aspects of road vehicle suspension dynamics and design are discussed, followed by descriptions of road-roughness excitations with a particular emphasis on road potholes. Passive suspension system designs and their effects on road vehicle dynamics and stability are presented in terms of in-plane and full-vehicle arrangements. Controlled suspensions are also reviewed and discussed. The paper concludes with some potential research topics, in particular those associated with the development of hybrid and electric vehicles.

/pdf/editors-perspectives-road-vehicle-suspension-design-dynamics-1t3q2uyld2.pdf

Editors’ perspectives: road vehicle suspension design, dynamics, and control

The paper tackles the theme of evaluating dynamic load increases that the vehicle transfers to the road pavement, due to the generation of vibration produced by surface irregularities. The study starts from the generation, according to the ISO 8608 Standard, of different road roughness profiles characterized by different damage levels. In particular, the first four classes provided by ISO 8608 were considered. Subsequently, the force exchanged between the pavement and three typologies of vehicles (car, bus and truck) has been assessed by implementing, in Matlab®, the QCM (Quarter Car Model) characterized by a quarter vehicle mass and variable speed from 20 to 100 km/h. The analysis allows determining the amount of dynamic overload that causes the vibrational stress. The paper shows how this dynamic overload may be predetermined as a function of the pavements surface degradation. This is a useful reference for the purposes of designing and maintaining road pavements.

https://link.springer.com/content/pdf/10.1007%2Fs12544-013-0127-8.pdf

The vibrations induced by surface irregularities in road pavements – a Matlab ® approach

Ing. Holger Steeb, Dr.-Ing. Fehmi Cirak, Prof. Dr.-Ing. Ekkehard Ramm, University of Stuttgart, Department of Civil Engineering, Institute of Structural ...

Zeitschrift für angewandte mathematik und mechanik

Optimisation of dynamic vibration absorbers to minimise kinetic energy and maximise internal power dissipation

This study focuses on the statistical description and analysis of road surface irregularities that are essential for heavy-vehicle fatigue assessment. Three new road profile models are proposed: a homogenous Laplace moving average process, a non-homogenous Laplace process and a hybrid model that combines Gaussian and Laplace modelling. These are compared with the classical homogenous Gaussian process as well as with the non-homogenous Gaussian model that represents the road surface as a homogenous Gaussian process with Motor Industry Research Association spectrum enhanced by randomly placed and shaped irregularities. The five models are fitted to eight measured road surfaces and their accuracy and efficiency are discussed.

/pdf/models-for-road-surface-roughness-fviyb5s91r.pdf

Models for road surface roughness

Vagytans tillstand pa det statliga svenska vagnatet har inventerats med matbil sedan 1987. Av kostnadsskal mats inte alla vagar varje ar, istallet kan man anvanda modeller som prognostiserar tillst ...

Prognosmodeller för tillståndsmått i Trafikverkets Pavement Management System : IRI och spårdjup

Vagytans tillstand pa det statliga svenska vagnatet har inventerats med matbil sedan 1987. Syftet med dessa matningar ar att forse Trafikverkets pavement management system (PMS) med tillstandsdata. ...

/pdf/prognosmodeller-for-tillstandsmatt-i-trafikverkets-pavement-4ih9kl7p9h.pdf

Prognosmodeller för tillståndsmått i Trafikverkets Pavement Management System - makrotextur, MPD

Forty laser range finders mounted on a truck are used to assess two transverse profiles. One profile constitutes an unloaded case; it is placed 2.5 m behind the front wheel axle where the road is little influenced by any vehicle load. The other profile, .50 m behind the rear axle of the vehicle, constitutes the loaded case. This paper is an evaluation of the different profiles gathered on four different locations. In this context, a correlation with the subgrade elastic properties derived from backcalculation of falling weight deflectometer (FWD) data is sought. Correlation with other layers have been analyzed and will be published.

Evaluating subgrade properties with a high-speed rolling deflectometer

The work presented in this study created a numerical method for the investigation of water-lubricated soft elastohydrodynamic (EHD) conjunctions as it relates to car tire aquaplaning. The specific subject of this investigation is viscous aquaplaning on thin fluid layer, with water acting as a lubricant on the rubber. A number of assumption used in the study include: a single perfect smooth tire; a perfectly smooth and infinitely stiff road surface; a very thin water film; no mass inertia results; pure water lubrication. The above asumptions allowed applying advanced numerical methods originally developed for the lubrication theory to the aquaplaning of a pneumatic tire on a thin layer of water. The results obtained showed no fluid film separating the surfaces in the test velocities.

Elastohydrodynamic aspects on the tyre-pavement contact at

Rapporten presenterar ett forslag till en prognosmetod for framtida varden av spardjup och IRI pa det belagda statliga vagnatet samt olika matt pa prognosnoggrannhet. Metoden kan aven anvandas for ...

Peter Andren

Papers

Prognosmodeller för tillståndsmått i Trafikverkets Pavement Management System : IRI och spårdjup

Prognosmodeller för tillståndsmått i Trafikverkets Pavement Management System - makrotextur, MPD

Evaluating subgrade properties with a high-speed rolling deflectometer

Elastohydrodynamic aspects on the tyre-pavement contact at

Prognosmetoder för spårdjup och IRI : vägytedata 1997–2016