부산대학교 도서관

The study of vibration effects on the human body was undertaken twenty-five years ago. Biomechanical models of the human body have since been suggested as a result of several experimental findings. These models (as with any analog system) allow interacting complex phenomena to be represented more exactly and can lead to valuable ergonomic results. They enable, in particular, a dynamic evaluation of seats during steady state vibrations and shocks.
Repetitive experiments on the same subject in the same conditions make it possible to obtain a numerical evaluation of the model parameters, although important differences are found between subjects and also for the same subject in varying postures. As a rule, the dynamic properties of the pelvis-table link can be obtained with a satisfactory degree of precision, but for the thorax-pelvis link the dispersion of the experimental results prevents results of general applicability.
Finally, it is noted that the mechanical properties of the human body cannot be considered as varying linearly with the intensity of excitation. This makes the reaction to the random stimulations usual in working conditions even more complex. [ABSTRACT FROM AUTHOR]