Whole-body vibration is a problem in off-road vehicles which can cause both injuries and discomfort. Comfort depends on several environmental factors of which the vibration level is one factor. This study focuses on 'vibration comfort' and is restricted to transient vibrations. ISO 2631 primarily addresses long-term effects due to continuous, whole-body vibrations. Guidelines about comfort are provided, however information regarding transient motions is limited. New criteria for measurements of vibration comfort are therefore of considerable value in the understanding of how to improve vibration comfort in vehicles. The aim of this study is to find a relationship between assessments of vibration comfort and measured vibration levels. A designed experiment based on the variables of vehicle speed, obstacle height and a load condition were carried out on a forklift truck. Response variables were discomfort assessments and measured accelerations in 4 degrees of freedom in the seat/driver and seat/cabin interface. Data from the subjective assessment of 11 professional drivers was collected. A questionnaire was used to control for background variables of importance such as driver's weight, age, experience and vibration-sensitivity. In case of individual results, the correlation coefficient between RMS-values in the z-direction and comfort-assessments was 0,54. Based on averages for each test condition, the correlation coefficient was 0,93. Further studies are in progress to assess if measurements of the rotational degree of freedom will improve the prediction of discomfort.


    Zugriff

    Zugriff über TIB

    Verfügbarkeit in meiner Bibliothek prüfen


    Exportieren, teilen und zitieren



    Titel :

    Discomfort from transient whole body vibrations


    Beteiligte:
    Jönsson, P. (Autor:in) / Johansson, Ö. (Autor:in)


    Erscheinungsdatum :

    2000


    Format / Umfang :

    8 Seiten, 11 Bilder, 1 Tabelle, 6 Quellen


    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Print


    Sprache :

    Englisch




    Discomfort from transient whole body vibrations

    Jonsson, P. / Johansson, O. / International Society for Terrain-Vehicle Systems | British Library Conference Proceedings | 2000



    Prediction of vehicle discomfort from transient vibrations

    Jönsson, P. / Johansson, Ö. | Tema Archiv | 2005


    Discomfort from transient motions

    Joensson,P. / Johansson,O. / Lulea Univ.of Technol.,SE | Kraftfahrwesen | 2000


    Discomfort criteria for single-axis vibrations

    Dempsey, Thomas K. / Leatherwood, Jack D. / Clevenson, Sherman A. | TIBKAT | 1979