Passsenger Ride Comfort and International Roughness Index Specifications in the Slovak Republic

Peter Mucka,George Juraj Stein,Peter Tobolka

doi:10.26552/com.c.2019.1.14-21

Peter Mucka, George Juraj Stein + Show 1 more

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https://doi.org/10.26552/com.c.2019.1.14-21

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Abstract

New original results are presented on relation between passenger’s whole-body vibration (WBV) and longitudinal road unevenness characterised by the International Roughness Index (IRI) in 100-m segments. Measurements were provided in nine different cars of six vehicle categories operated on about 1860 km of road network. Vibration total value based on the root mean square (RMS) of the frequency-weighted acceleration was used to quantify the ride comfort at seat surface and seat base (i.e. vehicle floor) in three orthogonal axes. The relations between passenger’s acceleration response, comfort reaction levels according to the ISO 2631-1: 1997 and the IRI road unevenness classes, used by the Slovak Road Administration, were estimated. Results indicated higher WBV by ~ 20 % on the motorways than on the 1st and 2nd class roads in the same IRI road class. Using the same IRI road classes for motorways and the 1st and 2nd class roads seems not to be appropriate from the point of view of the whole-body vibrations.

Highlights

Longitudinal road unevenness is an important parameter of Pavement Management System [1] and in Slovak Republic is characterised by the International Roughness Index (IRI) index
A comprehensive overview was provided of the relations between the passenger whole-body vibration (WBV) in a motor vehicle and IRI based on extensive field measurements of a total length of about 1800 km
The novelty of presented results is in estimation of vehicle speed, road category and IRI road class influence on the passenger ride comfort

Summary

Introduction

Longitudinal road unevenness is an important parameter of Pavement Management System [1] and in Slovak Republic is characterised by the IRI index. This study is aimed to identify the relation between the measured WBV of a passenger in a motor vehicle and IRI based on field measurements. Such results have not been previously summarized and discussed. They used a passenger car with a dummy [7], luxury SUV [9], luxury sedan [15], multifunction vehicle [4, 11], van [13], van and ambulance [5], bus [8] and truck with a trailer [5,6]. Most of published results were provided in the vertical direction only or in the three orthogonal axes at the seat surface

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