Transmissibility and DPMI analysis of the seated posture of Human under Low frequency vibration

Humans are more sensitive to whole Body Vibration under low frequency range. Under this frequency range human feels more discomfort. Due to this reason more research is going on from more number of years in low frequency range. As a part of research biodynamic models are prepared to number of degrees of freedom and these results are compared with the experimental data. In the present study, the authors prepared a 5 DOF biodynamic model of the human body in a sitting posture without backrest under sinusoidal excitation to determine the dynamic response characteristics such as Driving point mechanical impedance (DPMI) which describes the “tothe–body “force-motion relationship at the seat to human interference and Transmissibility function describes the “through–the-body” vibration transmission properties. As a part of this study analytical transmissibility data is validated with the experimental data. The resonant frequencies of the human subjects computed on the basis of Transmissibility function are found to be within close to that of the expected for the human body.