人体腰椎有限元建模及其生物动力学研究

Finite Element Modeling of Lumbar Spine and Study on Its Biodynamics

我们建立了一个详细的腰椎L3-L5段的三维非线性有限元模型,以研究振动环境对人体脊椎组织的影响。研究表明,在振动过程中,脊柱不同部位的振动程度不尽相同,L4-L5段椎间盘后部附近的应力要大于其前部的应力水平。振动对L4-L5段小关节的影响比该运动段的其它部位的影响要大得多。在系数为0.08的阻尼情况下,脊柱的应力与变形的变化幅度将降低50%左右。

A detailed three-dimensional nonlinear finite element model of lumbar segment L3-L5 was developed to investigate the influence of vibration on the components of human spine. The results show that the vibration effects of different spinal components are not exactly the same, and the stress near the posterior region of L4-L5 annulus is higher than that of its anterior region. The vibration exerts a great influence on the facet joint of L4-L5 segment. The changing amplitudes of stress and deformation of spine reduce by 50% on the condition that the damping ratio is 0.08.