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Development of Human Body Vibration Model Including Wobbling Mass  

김영은 (단국대학교 기계공학과)
백광현 (단국대학교 기계공학과)
최준희 (단국대학교 대학원)
Publication Information
Transactions of the Korean Society of Automotive Engineers / v.10, no.2, 2002 , pp. 193-200 More about this Journal
Abstract
Simple spring-damper-mass models have been widely used to investigate whole-body vortical biodynamic response characteristics of the seated vehicle driver. Most previous models have not considered the effect of wobbling masses; i.e. heart, lungs, liver, intestine, etc. In this study, 4 -DOF seated driver model including one non-rigid mass representing wobbling visceral mass, 5-DOF model including intestine, and 10-DOF model including five lumbar vertebral masses were proposed. The model parameters were identified by a combinatorial optimization technique. simulated annealing method. The objective function was chosen as the sum of error between model response of seat-to-head transmissibility and driving point mechanical impedance and those of experimental data for subjects seated erect without backrest support. The model response showed a good agreement with the experimental response characteristics. Using a 10-DOF model, calculated resonance frequency of lumbar spine at 4Hz was matched well with experimental results of Panjabi et al.
Keywords
Human body model; Vibration; Wobbling mass; Optimization technique; Disc; Resonance;
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