Vibration energy absorption in the whole-body system of a tractor operator
Journal Title: Annals of Agricultural and Environmental Medicine - Year 2014, Vol 21, Issue 2
Abstract
Many people are exposed to whole-body vibration (WBV) in their occupational lives, especially drivers of vehicles such as tractor and trucks. The main categories of effects from WBV are perception degraded comfort interference with activities-impaired health and occurrence of motion sickness. Absorbed power is defined as the power dissipated in a mechanical system as a result of an applied force. The vibration-induced injuries or disorders in a substructure of the human system are primarily associated with the vibration power absorption distributed in that substructure. The vibration power absorbed by the exposed body is a measure that combines both the vibration hazard and the biodynamic response of the body. The article presents measurement method for determining vibration power dissipated in the human whole body system called Vibration Energy Absorption (VEA). The vibration power is calculated from the real part of the force-velocity cross-spectrum. The absorbed power in the frequency domain can be obtained from the cross-spectrum of the force and velocity. In the context of the vibration energy transferred to a seated human body, the real component reflects the energy dissipated in the biological structure per unit of time, whereas the imaginary component reflects the energy stored/released by the system. The seated human is modeled as a series/parallel 4-DOF dynamic models. After introduction of the excitation, the response in particular segments of the model can be analyzed. As an example, the vibration power dissipated in an operator has been determined as a function of the agricultural combination operating speed 1.39 – 4.16 ms[sup] -1 [/sup].
Authors and Affiliations
Jan Szczepaniak, Wojciech Tanaś, Jacek Kromulski
Keywords
Related Articles
- EP ID EP80801
- DOI -
- Views 147
- Downloads 0
Analysis of the phenomenon of attempted suicides in 1978-2010 in Poland, with particular emphasis on rural areas of Lublin Province
The increasing quality of life of modern man should go hand-in-hand with reducing the scale of the problem of attempted suicides. During the last 55 years, the World Health Organization has recorded an increase in the nu...
Diagnosis and differentiation of infarction of the gastrocolic omentum and epiploic appendagitis – case description
The article presents the history of the disease in a 43-year man who reported to hospital because of the sudden occurrence of strong, diffuse, abdominal pain. Diagnostic tests performed in the emergency mode, including a...
Factors influencing the distribution and activity of Dermacentor reticulatus (F.) ticks in an anthropopressure-unaffected area in central-eastern Poland
[b]Introduction and objectives.[/b] Despite the increasing prevalence and significant role of D. reticulatus in pathogen transmission, the factors influencing its distribution and activity are still poorly known. The pap...
Diverticular bleeding complicating dual antiplatelet therapy after drug-eluting stent implantation
Acute lower gastrointestinal bleeding is defined as a bleeding situation in which blood loss has been occurring for less than 3 days resulting in haemodynamic instability, anaemia, or the need for blood transfusion. Diver...
Health-Related Physical Fitness, BMI, physical activity and time spent at a computer screen in 6 and 7-year-old children from rural areas in Poland
The objective of the study was determination of the effect of various forms of physical activity, BMI, and time devoted to computer games on the level of Health-Related Physical Fitness (H-RF) in 6–7-year-old children fr...