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Tuesday, July 9 • 15:50 - 16:10

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The measurement and analysis of whole-body vibration was done in accordance with ISO 2631-1 at a South African opencast mine to identify potentially unhealthy levels of vibration exposure for operators of heavy mobile equipment. A total of 22 different vehicles were instrumented with a SVANTEK SV 106 human vibration meter and accompanying tri-axial seat pad accelerometer. These included bulldozers, excavators, off-road passenger vehicles, loaders and forklifts. The impulsiveness of the vibration led to the underestimation of the exposure by the RMS method and as such the vibration dose value (VDV) was also calculated. Impulsive whole-body vibration with a crest factor (CF) greater than nine was found on all of the measured vehicles and 90.6% of test cases showed possibly unhealthy levels of vibration exposure according to Directive 2002/44/EC. It was found that bulldozer operators were exposed to the highest average levels of whole-body vibration with the vehicle tasks are used for as well as operating conditions also having a significant impact on whole-body vibration.

Tuesday July 9, 2019 15:50 - 16:10 EDT
Outremont 4
  T06 Industr. and occup. Noise & vib., SS02 H&-arm & wh-body vibr