Abstract Technological advances available in wood harvesting machines have provided productivity improvements and more comfort in forestry operations. However, operators may be exposed to whole-body vibration which can lead to a wide variety of health disorders and industry losses. This research aimed to evaluate the exposure of workers to whole-body vibration in thinning harvesting operations comparing two models of harvesters (tracked and wheeled) working in Pinus taeda stands submitted to the first commercial thinning. Whole-body vibration was determined by the three orthogonal axes (X, Y, and Z) using a 3-Axis integrator vibration meter, and the data were analyzed according to the criteria established by the ISO 2631–1:1997 and the European Directive, 2002/44/EC, concerning the resulting acceleration from normalized exposure A (8) and value of the resulting vibration dose value (VDV). The acceleration and vibration levels obtained by the tracked harvester presented mean values of A (8) of 0.6 m/s2 and VDV 11.2 m/s1.75, while by the wheeled harvester, mean values were A (8) of 0.4 m/s2 and VDV 9.3 m/s1.75, respectively. It was possible to verify the expressive vibration from the tracked harvester analysis, the operators were exposed to the whole-body vibration above the limits recommended by the regulating norms.

中文翻译：

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松林间伐期轮式履带式收获机运行中的全身振动

摘要 木材收割机的技术进步提高了林业作业的生产力和舒适度。但是，操作员可能会受到全身振动的影响，这可能导致各种健康问题和行业损失。本研究旨在评估工人在间伐采伐作业中暴露于全身振动的情况，比较两种型号的采伐机（履带式和轮式）在首次商业间伐的火炬松林分工作。使用 3 轴积分器振动计通过三个正交轴（X、Y 和 Z）确定全身振动，并根据 ISO 2631–1:1997 和欧洲指令制定的标准分析数据, 2002/44/EC, 关于归一化曝光 A (8) 产生的加速度和产生的振动剂量值 (VDV) 的值。履带式收割机获得的加速度和振动水平的平均值为 A (8) 0.6 m/s2 和 VDV 11.2 m/s1.75，而轮式收割机的平均值为 A (8) 0.4 m/s2和 VDV 分别为 9.3 m/s1.75。有可能通过履带式收割机分析来验证富有表现力的振动，操作员暴露在高于监管规范建议限制的全身振动中。