427 多軸振動下における手腕-ハンドル系の周波数応答解析 : 前腕回内外の影響

概要

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Prolonged exposure to hand-arm vibration (HAV) due to use of hand-held power tools leads to an increased occurrence of symptoms of disorders in the vascular, neurological, and osteo-articular systems of the upper limbs called hand-arm vibration syndrome (HAVS). Biodynamic responses (BR) of the hand-arm system to vibration can be suggestive parameters that give us better assessment of exposure to HAV and fundamental data for design of low-vibration-exposure power tools. Previous studies on BR measurements have been performed under one-axis vibration mainly because of technical problems. In this study measurements of BR parameters of the hand-arm system were performed using a state-of- the-art tri-axes vibration system to examine effects of arm postures on vibration transmission/absorption behavior of the hand-arm system under multi-axes vibration. Our measurements resulted in an increase in vibration power absorption (VPA) especially at the palm side when the elbow was straightened with the forearm rotated internally, showing inverse effects of elbow extension on VPA and hence the health risk of exposure to vibration at the hand.
一般社団法人日本機械学会の論文
2009-08-03