Search results for "Vibration exposure"
showing 7 items of 7 documents
Determining noise and vibration exposure in conifer cross-cutting operations by using Li-Ion batteries and electric chainsaws
2018
In many activities, chainsaw users are exposed to the risk of injuries and several other hazard factors that may cause health problems. In fact, environmental and working conditions when using chainsaws result in workers&rsquo
Biodynamic behavior of the trunk and the abdomen during whole-body vibration
1989
Vibration strain may be defined as the sum of all reactions of the human being to vibration exposure. This also includes the biomechanical behavior of particular parts of the body. Knowledge about these reactions is necessary in the field of occupational health and ergonomics. Biomechanical models, experimental methods, and results are presented. It can be shown that under vibration exposure with different conditions (body posture, vibration direction), the body parts are in resonance at varying frequencies, mainly in a low frequency range.
Optimising the efficiency of olive harvesting considering operator safety
2019
Mechanical-assisted harvesting of olives, which is carried out using hand-held harvesting units that detach the drupes through vibration supplied by electric motor or combustion engines, is a widespread method used in southern Italy. Such machines are able to harvest more than 80% of the overall quantity of olives available per tree in 5–10 min, but their performance is influenced by several factors related to the mechanical characteristics of the device and to the features of the trees. Here the problem of optimising harvesting efficiency whilst minimising the health risks to the operators is investigated, with the aim of demonstrating that it is possible to determine an optimum harvesting…
Raynaud-Phänomen bei einer beruflichen Vibrationsbelastung
2013
Anamnese und klinischer Befund: Eine 34-jahrige Steinmetzin wurde mit der Fragestellung eines vibrationsbedingten vasospastischen Syndroms (VVS) begutachtet. Ihre Hande waren langjahrig gegenuber den hochfrequenten Schwingungen verschiedener Werkzeuge exponiert gewesen. Die Patientin berichtete uber Weisfingeranfalle an den Langfingern, die bei Kalte aufgetreten waren. Der korperliche Befund war zu diesem Zeitpunkt regelrecht. Untersuchungen: Der Kaltwasserprovokationstest zeigte an den Langfingern der rechten Hand eine leicht verzogerte Wiedererwarmung; die Kapillarmikroskopie der Finger war regelrecht. Diagnose und Verlauf: Das leichtgradige Raynaud-Phanomen wurde als Berufskrankheit der …
The Influence of Particular Modes of Vibration
1986
When vibration stress occurs at the place of work, 1, 2, or 3 directions of the coordinate system related to man, or vectors of these axes, can be involved (Fig. 1). In such multiaxial vibration, the stress may predominate in one direction or may have similar magnitudes in all directions. In addition, rotational vibration about these axes may also take place (see section “Rotational Vibration,” p. 125).
Stress-Strain Concept in Whole-Body Vibration
1986
The strain-stress concept defines stress. First of all, stress refers to vibration exposure (kind, intensity, and duration of vibration) and the additional stress factors that act upon man when exposed. Strain, on the other hand, means the effects of such stress, that is, the reaction (biodynamic, psychological, physiological, damaging) of the human being, taking into consideration the individual endogenous conditions (see Table 2).
Work-Related Stress from Whole-Body Vibration
1986
During the last 10 years, many field experiments have been carried out in various places of work. Vibration has been measured in buildings, in vehicles, and on ships. These data are currently being compiled (Dupuis and Hartung 1982) to be fed into the vibration data bank at the BIA.