Griefahn B, Bröde P
Institute for Occupational Physiology at the University of Dortmund, Germany.
Appl Ergon. 1999 Dec;30(6):505-13. doi: 10.1016/s0003-6870(99)00021-6.
Sensitivity of lateral motions relative to vertical motions were determined and compared to predictions provided by ISO 2631. Two experiments were executed where lateral and vertical motions were applied consecutively or simultaneously and where the magnitude of a single- or dual-axis test signal was adjusted until it was judged as equivalent to a preceding single-axis reference motion of the same frequency. Experiment 1: References consisted of vertical sinusoidal motions presented with 1.6-12.5 Hz and weighted accelerations of a(zw) = 0.3, 0.6 and 1.2 m s(-2) r.m.s., single-axis test signals were lateral motions of the same frequency. 26 subjects (15 men, 11 women, 20-56 yr) participated in the experiments. Accelerations adjusted for lateral vibrations above 1.6 Hz were considerably lower than predicted suggesting that the weighting factors provided in ISO 2631 are incorrect. Experiment 2: References consisted of single-axis vertical or lateral sinusoidal motions presented with 1.6-12.5 Hz and a weighted acceleration of a(zw) = 1.25 m s(-2) r.m.s. The dual-axis test signals consisted of a constant fraction of the reference acceleration (10, 25, 50, 75, 90%) and a perpendicularly oriented adjustable component. 31 subjects (15 men, 16 women, 19-51 yr) participated in the experiments. Both experiments revealed that ISO 2631 is qualitatively valid, the weighting of lateral motions above 1.6 Hz, however, should be increased in order to meet the actual sensitivity particularly in case of multi-axis vibrations.
确定了横向运动相对于垂直运动的敏感度，并与ISO 2631提供的预测结果进行了比较。进行了两项实验，其中横向和垂直运动相继或同时施加，并且单轴或双轴测试信号的幅度被调整，直到被判定等同于相同频率的先前单轴参考运动。实验1：参考由频率为1.6 - 12.5 Hz且加权加速度a(zw) = 0.3、0.6和1.2 m s(-2) r.m.s.的垂直正弦运动组成，单轴测试信号为相同频率的横向运动。26名受试者（15名男性，11名女性，年龄20 - 56岁）参与了实验。对于高于1.6 Hz的横向振动所调整的加速度远低于预测值，这表明ISO 2631中提供的加权因子是不正确的。实验2：参考由频率为1.6 - 12.5 Hz且加权加速度a(zw) = 1.25 m s(-2) r.m.s.的单轴垂直或横向正弦运动组成。双轴测试信号由参考加速度的恒定比例（10%、25%、50%、75%、90%）和一个垂直方向的可调分量组成。31名受试者（15名男性，16名女性，年龄19 - 51岁）参与了实验。两项实验均表明ISO 2631在定性上是有效的，然而，为了满足实际敏感度，尤其是在多轴振动的情况下，高于1.6 Hz的横向运动的加权应该增加。
