Yokomori M, Yamada S, Nakagawa T, Matsumoto T
Sangyo Igaku. 1981 Mar;23(2):134-40. doi: 10.1539/joh1959.23.134.
Lately, in our country, daily motorcycling mail deliverers suffered from vibration hazards have been increasing. The vibration level of the handle of motorcycles was measured in order to evaluate its hazardous effects. The tested motorcycle with a 90 cc engine was selected among many motorcycles for daily use. Running test was made on the chasis dynamometer and asphalt roads. Following results were obtained. 1) The direction showing the maximum value of vibrations acceleration is in other directions than, X, Y, Z of ISO (International Organization for Standardization). 2) The maximum vibration acceleration level exceeds the exposure guidelines of ISO and its frequency is an accordance to the engine speed of the motorcycle in running. 3) The levels in the frequency ranges from 6 to 20 Hz and from 50 to 100 Hz are liable to induce vibration hazards. 4) The stronger the gripping power, the more the vibration acceleration level in the frequency range of 6-20 Hz and, on the contrary, the vibration acceleration level decreases in the range of 50-100 Hz. 5) The rubber grips of this motorcycle are not effective for abating the vibration on the frequency spectrum less than 125 Hz or 200 Hz.
最近在我国，遭受振动危害的日常骑摩托车邮递员数量一直在增加。为评估其危害影响，对摩托车把手的振动水平进行了测量。在众多日常使用的摩托车中，挑选了一辆配备90立方厘米发动机的测试摩托车。在底盘测功机和柏油路上进行了行驶测试。得到了以下结果。1）振动加速度最大值所显示的方向并非国际标准化组织（ISO）规定的X、Y、Z方向。2）最大振动加速度水平超过了ISO的暴露准则，且其频率与摩托车行驶时的发动机转速一致。3）6至20赫兹以及50至100赫兹频率范围内的振动水平容易引发振动危害。4）握持力越强，6至20赫兹频率范围内的振动加速度水平越高，相反，在50至100赫兹频率范围内振动加速度水平则降低。5）这辆摩托车的橡胶把手对于减弱低于125赫兹或200赫兹频谱上的振动并无效果。
