Abstract
In this paper is developed and applied a thermo-biomechanical virtual manikin used in transient systems. This numerical model, under transient conditions, is applied in the thermal and vibrations of the different sections of the human body. The thermal numerical model, based in energy and mass balance integral equations, considers the first order equations systems, while the vibration numerical model, based in Newton equation, considers the second order equations systems converted in first order equation system. The resolution of the numerical model is made through the Runge-Kutta-Fehlberg method with error control. The thermal numerical model is used in the study of the periodical and randomized airflow fluctuations applied to the human body section and the biomechanical numerical model is used in the study of the periodical and randomized vibrations applied to the feet, that a standing person is subjected. The signals of the stimuli, the power spectrum, the equivalent frequencies and the Draught Risk (DR) of the same signals will be presented. In accordance with the obtained results, is verified that: in the thermal component the DR is evaluated and in the vibration component the body structure reduces the power spectra energy frequency and the equivalent frequency analysis.
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