Welp MagazineBS ISO 2631-5:2018 Mechanical vibration and shock. Evaluation of human exposure to whole-body vibration. Method for evaluation of vibration containing multiple shocks standard explains how to measure the exposure of an individual to whole-body vibration. The standard describes the frequency characteristics of the source, how to evaluate the vibration instantaneously at the position of the human body, and how to calculate the vibration exposure of the whole body.
The standard is applicable to work activities where the stationary worker is subjected to whole-body vibration and is required to be considered for hazardous exposure.
What is the intended use of the BS ISO 2631-5:2018?
The standard ISO 2631-5:2018 is intended to be used in combination with ISO 2631-1:2017.
The standard describes the frequency characteristics of the source, how to evaluate the vibration at the position of the human body, and how to calculate the vibration exposure of the whole body.
The test conditions described comply with the 7.5 metre cutoff criteria specified in ISO 2041:1995.
The frequency response of the system is such that the cutoff frequency is in the range 2–4 Hz and a signal conditioning can be achieved by using a high pass filter with a cut-off frequency of 25–70 Hz.
The standard excludes the multi-component whole-body vibration that is of interest in military applications and vehicle simulation. The method is applicable to work activities where the stationary worker is subjected to whole-body vibration and is required to be considered for hazardous exposure.
What are the major revelations of the BSI ISO 2631-5:2018?
The method described in ISO 2631-5:2018 can be used for any type of vibration sources and is based on the steady state vibration at the position of the worker. The method describes the frequency characteristics of the source.
The source characteristics are first determined before being evaluated. This is done using a digital frequency analyser in a monitoring mode.
The resulting monitoring signals must not contain rated values less than 1% of the peak value for all frequencies except at the frequencies where monitoring is not used.
The monitoring results are used to calculate the A-weighted sound pressure levels at the position of the worker’s torso.
The standard determines the mathematical relationship between the sound pressure levels and the Peak Force Excess Levels for a Human Body model.
