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Múčka, Peter; Stein, George Juraj; Tobolka, Peter
Vehicle system dynamics, 04/2020, Volume: 58, Issue: 4Journal Article
This study presents original new results on measured whole-body vibration (WBV) on passenger's seat surface and seat base as a function of measured road unevenness in the longitudinal direction. Measurements were provided on nine different cars of six categories operated on about 1860 km of road network. Root mean square (RMS) of the frequency-weighted acceleration was used to quantify the WBV. The relation between passenger's total vibration and road profile vertical displacement power spectral density (PSD) parameters (unevenness index, waviness) specified in standard ISO 8608: 2016 in a 200-m segment were estimated. Relation between ISO 2631-1 degrees of discomfort and ISO 8608 road classes was estimated. Measured acceleration at the passenger's seat surface and seat base was fitted by a four-parameter function of unevenness index, waviness and vehicle speed. Further considered factors were vehicle type, road category, acceleration measuring point and direction of acceleration response.
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