Author
Peter Andren
Bio: Peter Andren is an academic researcher from Transport Research Institute. The author has contributed to research in topics: Deflection (engineering) & Pavement management. The author has an hindex of 5, co-authored 18 publications receiving 268 citations.
Papers
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TL;DR: In this paper, the authors present a literature survey of power spectral density (PSD) approximations of road profiles and test four different PSD approaches on longitudinal road profile data from the entire Swedish state road network.
Abstract: The power spectral density (PSD) representation of road profiles can be used both to assess the road roughness, and as an input to vehicle dynamics. The PSD is often approximated with a simple function, using only a few parameters. The present paper presents a literature survey of such PSD approximations, and tests four approximations on longitudinal road profile data from the entire Swedish state road network.
175 citations
01 Jan 2006
TL;DR: A project to construct a high-speed road deflection tester was initiated in the 1991 and a mid-sized truck was used as a carrier for the first prototype as discussed by the authors.
Abstract: A project to construct a high-speed road deflection tester was initiated in the 1991. A mid-sized truck was used as a carrier for the first prototype. The results were promising and it was decided ...
43 citations
01 Jan 2006
TL;DR: In this paper, the authors present, partly, the collected VTI research on the "functional properties" of pedestrian and bicycle roads, and partly, a survey of what has been done in this field outside of VT.
Abstract: The present report presents, partly, the collected VTI research on the "functional properties" of pedestrian and bicycle roads, and partly a survey of what has been done in this field outside of VT ...
20 citations
05 May 2000
TL;DR: The Road Deflection Tester (RDT) is a testing vehicle for highways capable of assessing a road deflection profile at traffic speeds by using two arrays of laser range finders as discussed by the authors.
Abstract: The Road Deflection Tester (RDT) is a testing vehicle for highways capable of assessing a road deflection profile at traffic speeds by using two arrays of laser range finders. The deflection profile in turn is evaluated to determine layer properties in the road structure. The present study looks at some geometric relationships that can be used for this purpose. It was found that evaluation techniques used for stationary devices are less suitable. Other methods may however, be of great value.
6 citations
28 Jan 1999
TL;DR: In this paper, the results from the first major test with the high-speed rolling deflectometer are very promising and, even though many questions remains to be answered, the method has most certainly a strong potential.
Abstract: The high-speed rolling deflectometer is one of the result of almost twenty year of research in pavement condition using laser technique. The latest research vehicle is the laser Road Deflection Tester, built in the mid-nineties using experiences from a prototype truck from the early nineties. Apart from the laser range finders used for finding used for finding the deflection, the truck is also equipped with optical speedometers for both longitudinal and transversal speed, accelerometers and force transducers on the rear wheel axle and a gyro for assessing the deviation. Presently, only the laser range finders are being used as the rest of the sensors has not been calibrated in a satisfying way. During the spring and summer of 1998 a first test program was carried out, and about twenty different roads were studied as a first step towards a more thorough investigation on a road network level. The results from this first major test with the high-speed rolling deflectometer are very promising and, even though many questions remains to be answered, the method has most certainly a strong potential. A general view of some different ways to evaluate the data, as well as more thorough evaluation of some specific roads, will be presented in this paper.
6 citations
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TL;DR: In this paper, the authors provide 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.
Abstract: 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.
302 citations
TL;DR: In this paper, the authors tackle 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, and show how this dynamic overload may be predetermined as a function of the pavements surface degradation.
Abstract: 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.
197 citations
Book Chapter•
31 Oct 2000
TL;DR: In this paper, Holger Steeb, Dr.-Ing. Fehmi Cirak, Prof. Dr. Ekkehard Ramm, and Dr. Claus Ramm presented a structural model of a bridge.
Abstract: Ing. Holger Steeb, Dr.-Ing. Fehmi Cirak, Prof. Dr.-Ing. Ekkehard Ramm, University of Stuttgart, Department of Civil Engineering, Institute of Structural ...
154 citations
TL;DR: In this paper, the authors considered the tuning of a dynamic vibration absorber such that either the kinetic energy of the host structure is minimised or the power dissipation within the absorber is maximised.
123 citations
TL;DR: In this article, three road profile models are proposed: a homogenous Laplace moving average process, a non-homogeneous Laplace process and a hybrid model that combines Gaussian and Laplace modelling.
Abstract: 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.
96 citations