Whole-body vibration comfort measurement aboard the S. A. Agulhas II and just noticeable difference threshold testing in the laboratory

[摘要] ENGLISH ABSTRACT: A continuous comfort analysis of the whole-body vibration level aboard theS.A. Agulhas II during the 2013-2014 Antarctic voyage was conducted ac-cording BS ISO 2631-1:1997, assuming a standing posture. Just noticeabledifference in magnitude testing was conducted on nine subject in the standingposture on a man-rated shaker in the laboratory environment. Two stimuli,a 5 Hz sinusoidal stimulus with a magnitude of 0,5 m.s-2 and a slammingevent recoded during the voyage with a magnitude of 0,2 m.s-2 where selectedas the stimuli on which to investigate the just noticeable difference thresh-old. The study shows that the vibration level for the duration of the voyagecan be considered to be not uncomfortable. The results of the just notice-able difference threshold obtained for the sinusoidal stimulus concur with thatfound in literature for seated subjects. The just noticeable difference thresholdobtained for the ship stimulus does not correlate with the results for the sinu-soidal vibration, implying that there may be an error in the vertical weighting filter provided by the standard or that Webers law does not hold for the justnoticeable difference threshold of standing subjects.

[发布机构] Stellenbosch University