Dr. Mangesh Phate

Ms. Pooja Kamble

Prath Khedekar

Saurabh Kamble

Aniket Kamble

Abstract

We have come in contact with so many mechanical appliances where we are continuously in contact with mechanical vibrations. Higher magnitude of vibrations is adversely affected the human body in various ways. Especially taking the people who drive or seat in the vehicles like tractors,trucks,construction vehicles etc. In vibration human body acts as an active mechanical system. Many harmful side effects of the vibration can be both physiological and neurological which in many cases lead to permanent injury or disagreeable feelings giving rise to discomfort results. To analyze the impact of vibrations on the human seated posture, a simple anthropometric based human vibratory model with four degrees of freedom human biodynamic model is presented in the presented work and 4 degrees of freedom human seated model is tested against the vibrations impact. The whole seated posture is divided into four segments such as head, neck and upper torso, lower torso and the thigh. The reposnes of the human seated postures is measured in terms of the seat to head transmissibility, apparent mass and the driving point impedance. The presented biodynamic model is simple and economical which will help to analyze the vibration impact on human seated posture.The human seated posture is considered as 4 degrees of freedom mass damper mechanical system where body parameters such as mass, stiffness and damping coefficients are calculated by using some biodynamics considerations and standards along with the human anthropometric dimensions. The experimental findings show the nature of the impact of vertical vibrations on the human seated posture

Keywords- AM,Anthropometric,Biodynamic responses, DPMI,Human vibratory mode, STHT,Vibrations