Riedel S
Institute of Occupational Health and Social Medicine, Johannes Gutenberg University, Mainz, Germany.
Cent Eur J Public Health. 1995;3 Suppl:139-41.
There is much influence of the coupling forces between hand and grip of the vibrating tool on the measuring results as well as on the vibration effects on the hand-arm system. In a research project the effects of grip and push forces on acute responses of the hand-arm system under vibration conditions have been studied. Using these results of the biodynamic response, vibration perception threshold and subjective vibration sensation a bonus/malus system for a correction of the measured frequency-weighted r.m.s. acceleration was drafted, to assess the hand-arm vibration at the workplace: Since there is no difference between the acute effects of grip force and push force, so the forces have to be added and defined as coupling force Fcf. On the basis of this coupling force Fcf a correcting factor cF may be calculated. The factor amounts to 0.6 at Fcf = 20 N, 1.0 at Fcf = 120 N and 1.1 at Fcf = 200 N. To correct the measured weighted r.m.s. acceleration ahwz (Fcf) depending on coupling forces the r.m.s. acceleration has to be multiplied with the correcting factor cF. The drafted procedure enables to assess vibration exposure depending on coupling forces in a standardized way.
振动工具的手柄与手部之间的耦合力对测量结果以及对手臂系统的振动影响有很大作用。在一个研究项目中，研究了握持力和推力对振动条件下手臂系统急性反应的影响。利用生物动力学响应、振动感知阈值和主观振动感觉的这些结果，起草了一个用于校正测量的频率加权均方根加速度的奖惩系统，以评估工作场所的手臂振动：由于握持力和推力的急性影响没有差异，因此必须将这些力相加并定义为耦合力Fcf。基于此耦合力Fcf，可以计算出校正因子cF。当Fcf = 20 N时，该因子为0.6；当Fcf = 120 N时，为1.0；当Fcf = 200 N时，为1.1。为了根据耦合力校正测量的加权均方根加速度ahwz (Fcf)，均方根加速度必须乘以校正因子cF。起草的程序能够以标准化方式根据耦合力评估振动暴露。
