Biodynamics of the human body under whole-body vibration: synthesis of the reported data.
Rakheja-S; Dong-RG; Patra-S; Boileau-PE; Marcotte-P; Warren-C
Int J Ind Ergon 2010 Nov; 40(6):710-732
Identification of most probable ranges of biodynamic responses of the human body exposed to whole-body vibration is essential for developing effective integrated human-machine system design tools, improved vibration mitigation devices and frequency-weighting for exposure assessment. The international standard, ISO-5982 (2001), defines such ranges for very limited conditions, namely for body seated without a back support and exposed to vertical vibration. The reported data on biodynamic responses of the seated and standing human body exposed to whole-body vibration along different directions and the associated experimental conditions are systematically reviewed in an attempt to identify datasets that are likely to represent comparable and practical postural and exposure conditions. Syntheses of datasets, selected on the basis of a set of criterion, are performed to identify the most probable ranges of biodynamic responses of the human body to whole-body vibration. These include the driving-point biodynamic responses of the body seated with and without a back support while exposed to fore-aft, lateral and vertical vibration and those of the standing body to vertical vibration, and seat-to-head vibration transmissibility of the seated body. The proposed ranges are expected to serve as reasonable target functions in various applications involving coupled human-system dynamics in the design process, and potentially for developing better frequency-weightings for exposure assessments. Relevance to the industry: Identification of most probable biodynamic responses of the seated and standing human body exposed to whole-body vibration is essential for developing anthropodynamic manikins, integrated human-machine system design tools for improved vibration mitigation devices and frequency-weighting for exposure assessment. This study derives ranges of biodynamic responses of the body seated with and without the back support, and those of the standing body. The ranges would serve as the target response functions for: (i) designs of anthropodynamic manikins for assessment of vibration isolation effectiveness of coupled seat-occupant system; (ii) development of human body models, which are vital for quantifying the vibration-induced stresses in different joints and for deriving integrated human-machine system design tools; and (iii) identification of alternate frequency weightings for assessment of vibration exposure.
Ergonomics; Biomechanics; Biodynamics; Human-factors-engineering; Vibration; Body-mechanics; Exposure-assessment; Equipment-design; Posture; Anthropometry; Vibration-exposure;
Author Keywords: Whole-body vibration biodynamics; Frequency-weighting; Ranges of biodynamics responses to vibration; Seat-to-head vibration transmissibility; Fore-aft; laetral and vertical apparent mass; Seated and standing body apparent mass
S. Rakheja, CONCAVE Research Centre, CR-200, Concordia University, 1455 de Maisonneuve Blvd West, Montreal, Québec H3G 1M8 Canada
International Journal of Industrial Ergonomics