Development of an integrated numerical model of the thermo-physiological and biomechanical human system applied in occupied spaces

In this study is developed an integrated numerical model of the thermo-physiological and biomechanical human system, in transient conditions. The numerical model is applicated in the evolution of human body temperature distribution and vibration in a vehicle occupied space. The virtual thermo-physiological human system, that simulates and controls the human thermal temperature distribution and considers the static and dynamic responses of cold and warm, considers the integration of first order equations systems, based in Fourier equation. In the virtual body's biomechanical response, that simulates the vibrations of the forty one sections of the human body, under transient conditions, considers the integration of second order equations systems, based in Newton equation, after being converted in a first order equation system. The coupling of the first order equation system is solved through the Runge-Kutta-Fehlberg method with error control. This numerical model will be used, in this work, in the study of the temperature and vibrations that a standing person is subjected in a vehicle occupied space. The influence of the surrounding temperature distribution and stimuli applied to the feet are analysed. Periodical and random irregularities, in the dynamic response of the vibrations in different sections of the human body are evaluated. The signals of the stimuli, the displacement of some sections of the body and the power spectrum of the same signals will be presented.