Mechanics Analysis of Lumbar Segment for the Athlete During Preparing Lifting Barbell and It's Finite Element Simulation

The thesis established the three-dimensional, comprehensive and realistic finite element model(FEM) of lumbar spine (L1-L5) for the Weight lifting athlete using datum of Dicom, which was used to simulate and anlyze the biomechanics of a lumbar motion segment during preparing lifting barbell. The results were following as: during preparing lifting barbell the equivalent stress on the anterior-lower location of vertebral body is higher than the rest location, stress on pedicle of vertebral arch is higher. The equivalent stress of intervertebral disc was found at middle-anterior location of exterior annulus fibrosus, especial anterior location in flexion. The equivalent stress on the vertebral body and intervertebral disc showed gradually ascending trend from up to down, the stress on the vertebral body is higher 4-5 times than the below intervertebral disc's.