期刊
ERGONOMICS
卷 54, 期 3, 页码 263-272出版社
TAYLOR & FRANCIS LTD
DOI: 10.1080/00140139.2010.547606
关键词
neck posture; predictive discomfort; reported discomfort; transmissibility; whole-body vibration
It seems obvious that human head-neck posture in whole-body vibration (WBV) contributes to discomfort and injury risk. While current mechanical measures such as transmissibility have shown good correlation with the subjective-reported discomfort, they showed difficulties in predicting discomfort for non-neutral postures. A new biomechanically based methodology is introduced in this work to predict discomfort due to non-neutral head-neck postures. Altogether, 10 seated subjects with four head-neck postures-neutral, head-up, head-down and head-to-side-were subjected to WBV in the fore-aft direction using discrete sinusoidal frequencies of 2, 3, 4, 5, 6, 7 and 8 Hz and their subjective responses were recorded using the Borg CR-10 scale. All vibrations were run at constant acceleration of 0.8 m/s(2) and 1.15 m/s(2). The results have shown that the subjective-reported discomfort increases with head-down and decreases with head-up and head-to-side postures. The proposed predictive discomfort has closely followed the reported discomfort measures for all postures and rides under investigation.
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