Dynamic Analysis Of Human Spine Under Vehicle Vibration Environment

With the rapidly development of auto industry, people are not merely satisfied with vehicle performance, the demand of vehicle ride comfort is becoming increasingly high. Dynamic characteristics and vibration damage problem of spine under the environment of vehicles vibration has been extensive attention by researchers. Understanding the dynamic characteristic of the human vertebra and looking for the spinal vibration protection method is worth further studying. The static and dynamic properties of human spine under vehicle vibration environment are researched in this paper.Firstly, use Mimics and ANSYS10.0to build the three-dimensional model of T12-Pelivis human body vertebra segments. On the basis of anatomical structure, add cartilage and ligament into FE model. To ensure the validation of the finite element model, the simulation results was compared with experiment data.Secondly, use ANSYS Workbench12.1to do the static analysis of each contiguous segments of T12-Pelivis FEM under five different sitting positions. These positions include upright, forward bending, backward bending, lateral bending and extorsion sitting styles. Perform the T12-Pelivis overall FEM static analysis under the different body posture.Again, perform the dynamic characteristics of the human body vertebra and find the sensitivity factor of disc material properties. Extract natural frequency and vibration mode after modal analysis. Perform the T12-Pelivis dynamic characteristics under the restriction of seat.Finally, perform the harmonic response analysis of the T12-Pelivis human body vertebra segments. Compare the simulation results with static characteristic analysis results and find the influence of vehicle dynamic load to the human body vertebra. Project’s findings will provide useful guidance for the design of vehicle seat.