Stressors Vibration

For environmental stressors, reduce contact with the stressor. Use a cool recovery acea to recover from heat, a quiet area to recover from noise, no vibration to recover from vibration. For muscle stressors, it helps to have a good circulation system (to be in good shape). Active rest seems better than passive rest. The active rest may be just walking to the coffee area (blood circulation in the legs improves dramatically within <20 steps). Another technique to get active rest is to have the operator do the material handling for the workstation (obtain supplies, dispose of finished components). 

The task has to be executed under the influence of environmental stressors, such as heat, noise, vibration, or working at night, which may disrapt the energetical state of the employee physically. These are direct effects on the organism and ate not mediated via cognitions or emotions as is the case with stress reactions. 

The circrrmstances or sitirations that induce stress responses are defined as stressors (Auerbach and Gramling, 1998). Green et al. (1996) outlined foiu types of pilots stressors, these are environmental stressors, domestic stress, work stress, and life stress. On the flight deck, environmental stressors specifically consist of excessive heat, noise, vibration, and low humidity. 

Environmental stressors such as extremes of temperature, noise, vibration, bodily injury, hunger, etc. all have both physiological effects as well as psychological effects. 

Main forms of physical stressors noise, temperature, light vibration and repetitive strain radiations. Main effects on the body. 

What you have read above has dealt with mat r of the workplace sources of disease, disability and ill health. These sources as we noted earlier are called stressors . Each stressor affects particular target cells, organs, tissnes or systems in the body. For information on noise, vibration and ionizing radiation as stressors, see Chapter 10. 

Some of the physical stressors that influence physical stress are duration of the stress, fatigue, pain or discomfort, hunger or thirst, temperature extremes, atmospheric pressure extremes, oxygen insufficiency, vibration, and disruption of circadian rhythm. 

The major stressor in fretting and wear is flow induced vibration. Initiation, stability, and growth characteristics of damage by these mechanisms may be functions of a large number of variables, including the local geometry, the stiffness of the component, the gap size between the parts, flow velocities and directions, and oxide layer characteristics. Wear is defined as the removal of material surface layers due to relative motion between two surfaces or under the influence of hard. 

All five tools included environmental stressors but apart from THERP, none went in to any detail, i.e. the four remaining HRA tools simply listed environmental conditions as a PSF. THERP provided more specific PSFs including temperature extremes, radiation, oxygen insufficiency, and vibration. However, THERP did not cover less extreme environmental conditions such as lighting levels, glare, and noise. 

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