Static And Dynamic Characteristic Analysis Of Human Spine Under Car Seat Constraint

With the continuous improvement of the car maneuver performance, people begin to put forward higher request to the car ride comfort. Vibration damping performance and comfort of vehicle seat affect various vertebra diseases caused by long-term driving. Study found that even small circular vibration load can also lead to the degeneration of intervertebral disc and variety of spinal disorders. Although seat vibration damping performance constantly improved, but recent studies show that vehicle vibration problem is still a significant reason which caused human over pain incidence. In recent years, more and more people pay attention to the damage of the human body vertebra caused by vehicle vibration. The international has proposed that through the adjustment of the vertebra bending posture to the purpose of the human body vertebra safety protection. The international in this research is still in its beginning stage.The research topics of this paper derived from the national natural science funds. The purpose of this study is the influence of vertebra vibration form caused bv vehicle seat.The first part:Through ct scan to obtain the human spine data of dicom format. Built three-dimensional models of human lumbar-pelvic-sacroiliac complexes by mimics software. Use ansys software to build the human intervertebral disk and ligament, eventually obtain the three-dimensional finite element model.The second part:Select the L4-L5of human lumbar sports stage which sicken easily, and carry on the biomechanical test. The results prove the model is effective. In different posture, perform the static analysis of model, find out the stress distribution and displacement rule. The paper analyzed the influence of disc by different body proneness angle.The third part:Perform the LI-Pelvis biomechanics analysis under the different body posture and the restriction of seat. The experimental results provide scientific theory for the seat static comfort design. The last part:Perform the L1-Pelvis modal analysis under the different body posture and the restriction of seat. Extract every response frequencies and modal shape. The results provides theory basis for the dynamic comfort of scat. Project’s findings will provide theoretical guidance for the design of new ant-vibration human protective vehicle seat.