Biodynamic Responses of Human Body in Standing and Seated Position

Abstract

The paper presents the comparative study of the biodynamic response of human body in standing and seated position. A 3D model of the human body in standing and seated position are generated based on anthropometric data for Indian male subject in SolidWorks. The finite element tool, ANSYS-Mechanical was used to perform modal analysis and to obtain natural frequencies and associated mode shapes for both positions. The principal resonance in both standing and seated position occurred at 5–6 Hz. Further, the responses of the models to seat/floor excitation are derived through harmonic analysis. The frequency response of the human body to low-frequency vibration in both positions was determined in terms of normalized apparent mass and acceleration ratio. Both FE model was able to predict the response of human body that matches with data reported in the published literature. The model will be useful to predict the vibration response of human body under various vibration environments encountered in daily life.