Longitudinal Road Profile Spectrum Approximation by Split Straight Lines

Múčka, Peter

doi:10.1061/(asce)te.1943-5436.0000314

Cited by 16 publications

(7 citation statements)

References 18 publications

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“…Probability density function and other calculations of statistical parameters were made to define the road pavement unevenness. Ap-proximation of three unconnected lines has the closest fitting to measured results and 6÷14% of mean error (Múčka 2012a(Múčka , 2012b.…”

Section: Introductionmentioning

confidence: 73%

The Impact of Road Roughness on the Duration of Contact Between a Vehicle Wheel and Road Surface

2014

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The paper analyses the impact of the road micro-profile on the duration and the type of the vehicle wheel contact with the road surface driving at different speed. The selected vehicle bicycle model describes vertical displacements of front and rear wheels and their suspension as well as the impact of the vehicle body motion and longitudinal oscillation. International Roughness Index (IRI) and micro-profile irregularities of the road section analysed in the paper were identified using specialized road testing equipment. The experimental investigations measuring the vehicle suspension displacement and the body acceleration were carried out. Frequency characteristics of suspension motion and regularities of vertical movement of the wheel were identified after dividing the investigated road section according to driving modes. The analysis into the wheel contact with the road surface and identified correlations enable to determine the vehicle stability on selected quality roads.

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Section: Introductionmentioning

confidence: 73%

The Impact of Road Roughness on the Duration of Contact Between a Vehicle Wheel and Road Surface

2014

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“…In fact, the straight-line fit (in bi-logarithmic plan, see Fig. 1) described in ISO 8608 does not always provide a good representation of the PSD of real road profiles and, for this reason, other fitting approximation, such as two-and threewave bands, has been proposed in the literature [23].…”

Section: Resultsmentioning

confidence: 99%

Use of generated artificial road profiles in road roughness evaluation

Loprencipe

Zoccali

2017

J. Mod. Transport.

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In the evaluation of road roughness and its effects on vehicles response in terms of ride quality, loads induced on pavement, drivers' comfort, etc., it is very common to generate road profiles based on the equation provided by ISO 8608 standard, according to which it is possible to group road surface profiles into eight different classes. However, real profiles are significantly different from the artificial ones because of the non-stationary feature of the first ones and the not full capability of the ISO 8608 equation to correctly describe the frequency content of real road profiles. In this paper, the international roughness index, the frequency-weighted vertical acceleration a wz according to ISO 2631, and the dynamic load index are applied both on artificial and real profiles, highlighting the different results obtained. The analysis carried out in this work has highlighted some limitation of the ISO 8608 approach in the description of performance and conditions of real pavement profiles. Furthermore, the different sensitivity of the various indices to the fitted power spectral density parameters is shown, which should be taken into account when performing analysis using artificial profiles.

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“…The BRI is well correlated with bridge dynamic amplification for bending moment due to two-axle truck crossing events. Múčka (2012b) suggested describe the road elevation spectrum by two split straight-lines with different slopes. The similar results for raw-road spectrum approximation were observed by Andrén (2006).…”

Section: Other New Approachesmentioning

confidence: 99%

Current approaches to quantify the longitudinal road roughness

Múčka

2015

International Journal of Pavement Engineering

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Paper summarised the proposals of fourteen new alternative indexes intended for road roughness evaluation of longitudinal road profile, which have been introduced in the last decade approximately. The main advantages of proposed indexes are: (1) effort to reflect the most of ride quality aspects such as ride comfort, ride safety and dynamic load of road or cargo; (2) using the in situ measurements of vibration response or subjective perception of vibration; (3) effort to reflect the vehicle responses such as roll and pitch vibration, or longitudinal and lateral vibration; (4) effort to detect the critical parts of road in a spatial domain; and (5) effort to reflect a vehicle velocity. The main limitations of proposed indexes are: (1) many proposals are only alternative to the international roughness index (IRI) or are based on the IRI procedure; (2) a simple one-dimensional vehicle model is often used with the constant parameters and velocity; and (3) orientation to one vibration response category as ride comfort.

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Longitudinal Road Profile Spectrum Approximation by Split Straight Lines

Cited by 16 publications

References 18 publications

The Impact of Road Roughness on the Duration of Contact Between a Vehicle Wheel and Road Surface

The Impact of Road Roughness on the Duration of Contact Between a Vehicle Wheel and Road Surface

Use of generated artificial road profiles in road roughness evaluation

Current approaches to quantify the longitudinal road roughness

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