Caffaro Federica, Preti Christian, Micheletti Cremasco Margherita, Cavallo Eugenio
a Institute for Agricultural and Earthmoving Machines (IMAMOTER) , National Research Council of Italy (CNR) , Torino , Italy.
b Department of Life Sciences and Systems Biology , University of Torino , Torino , Italy.
J Occup Environ Hyg. 2017 Oct;14(10):758-770. doi: 10.1080/15459624.2017.1334899.
Agricultural and earth-moving machinery operators are particularly exposed to whole-body vibration (WBV), which has severe effects on health and affects comfort and performance. Few studies have investigated vibrational safety and comfort issues in telescopic handlers. These vehicles are widespread in many off-road applications-such as construction, agriculture, and mining-used to handle loads and to lift persons and equipment. This study investigated the effects of an active hydro-pneumatic cab-suspension system fitted to a telehandler on a driver's vibration exposure along the x-, y-, and z-axes, through both objective and subjective assessments. Sixteen healthy professional telehandler drivers took part in the study. Objective measurements were acquired at the operator's seat, and subjective ratings were taken while participants drove the telehandler with either a deactivated or activated suspension system at 12 kph on an ISO 5008 smooth track. The results showed that the activation of the cab-suspension system reduced the root-mean-square acceleration along the x- and z-axes (p =.038 and p =.000, respectively). Moreover, the frequency analysis showed a reduction in the acceleration along the z-axis in the range of 2-25 Hz (p <.05 for all comparisons); in particular, the acceleration was reduced by 50% in the higher frequency range (4-20 Hz). A reduction in the vibration intensity was perceived by the participants along the y- and z-axes (p =.009 and p =.003, respectively). Implications for the future development of suspension systems are discussed.
农业和土方机械操作员特别容易受到全身振动（WBV）的影响，全身振动会对健康产生严重影响，并影响舒适度和工作表现。很少有研究调查伸缩臂叉装机的振动安全和舒适性问题。这些车辆广泛应用于许多越野领域，如建筑、农业和采矿，用于搬运货物以及载人载物。本研究通过客观和主观评估，调查了安装在伸缩臂叉装机上的主动式油气驾驶室悬架系统对驾驶员沿x、y和z轴方向振动暴露的影响。16名健康的专业伸缩臂叉装机驾驶员参与了该研究。在操作员座椅处进行客观测量，并让参与者在ISO 5008平滑轨道上以12公里/小时的速度驾驶伸缩臂叉装机，分别在悬架系统停用和启用的情况下进行主观评分。结果表明，驾驶室悬架系统的启用降低了沿x轴和z轴方向的均方根加速度（分别为p = 0.038和p = 0.000）。此外，频率分析表明，在2至25赫兹范围内沿z轴方向的加速度有所降低（所有比较的p < 0.05）；特别是在较高频率范围（4至20赫兹）内，加速度降低了50%。参与者感觉沿y轴和z轴方向的振动强度有所降低（分别为p = 0.009和p = 0.003）。文中还讨论了悬架系统未来发展的相关影响。
