Institut National de Recherche et de Sécurité (INRS), Vandoeuvre-lès-Nancy, France.
Ergonomics. 2023 Jan;66(1):136-151. doi: 10.1080/00140139.2022.2063950. Epub 2022 May 11.
Mobile machinery operators are exposed to whole-body vibrations (WBV) and unfavourable postures which may lead to adverse effects on the spine. 14 subjects were exposed to WBV on a rigid seat without a backrest. They adopted nine different postures. Apparent mass and seat-to-head transmissibility were measured in the horizontal (X), lateral (Y) and vertical (Z) directions. They were compared to the reference posture from the ISO 2631-1 standard. Head and thorax inclinations in the sagittal plane had significant effects. An increase in the main resonant frequency together with a decrease in were observed in the Z direction. A second lower frequency peak also appeared ( for X, for Z). increased in the X and Z directions for increased in the X direction. Head and thorax inclinations in the frontal and the horizontal planes had weak or non-significant effects. Mobile machinery operators are exposed to whole-body vibration and unfavourable body posture. Laboratory measurements of the apparent mass and the seat-to-head transmissibility in the horizontal (X), lateral (Y) and vertical (Z) directions are presented for 9 postures relevant to the exposure at the driving position and to the effects of vibration on the spine.
机器操作人员会接触到全身振动（WBV）和不利的姿势，这可能会对脊柱产生不良影响。14 名受试者坐在没有靠背的刚性座椅上接受 WBV 暴露。他们采用了九种不同的姿势。在水平（X）、侧向（Y）和垂直（Z）方向测量了表观质量和座椅到头部的传递率。将它们与 ISO 2631-1 标准中的参考姿势进行了比较。矢状面中头部和胸部的倾斜度有显著影响。在 Z 方向上，观察到主共振频率增加，而降低。在 X 方向上也出现了第二个较低的频率峰值（对于 X，对于 Z）。对于 X 方向上的增加，在 X 和 Z 方向上增加。头部和胸部在额状面和水平面的倾斜度影响较弱或不显著。机器操作人员会接触到全身振动和不利的身体姿势。在水平（X）、侧向（Y）和垂直（Z）方向上，针对驾驶位置的暴露和振动对脊柱的影响，呈现了 9 种与驾驶位置相关的姿势的表观质量和座椅到头部传递率的实验室测量结果。
