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首页> 外文会议>International Conference on Mechanical Engineering and Mechanics vol.1; 20051026-28; Nanjing(CN) >The Effect of Axial Acceleration on the Responses of Cervical Spine During Low Speed Rear-end Impact
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The Effect of Axial Acceleration on the Responses of Cervical Spine During Low Speed Rear-end Impact

机译：低速追尾时轴向加速度对颈椎反应的影响

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摘要

A previously developed and validated detailed three-dimensional head-neck (C0-C7) finite element (FE) model based on the actual geometry' of a cadaveric specimen was used to evaluate the effect of axial acceleration on the response of cervical spine during low speed rear-end impact. Analyses were carried out to compare the predicted overall and segmental rotations, peak disc stresses and capsular ligament strains of each motion segment during whiplash with or without axial acceleration applied on C7 inferior surface. The results show that in the first 150ms, the variation curves of predicted segmental rotational angles, disc stresses and capsular strains for each motion segments overlapped well under the two conditions. However, after 150ms, the capsular strains of C2 to C6 without axial acceleration applied on C7 were all significantly lower than those with axial acceleration applied, but the segmental rotational angles and disc stresses remain unaffected. It was implied that although without axial acceleration applied on C7, the relatively simple head-neck model could be used to effectively reflect the biomechanical response of the cervical spine during initial stage (i.e. 150ms) under low speed rear-end impact as well as the whole human body dummy model.
机译：基于尸体标本的实际几何形状，使用先前开发和验证的详细三维头颈（C0-C7）有限元（FE）模型来评估轴向加速度对低位颈椎反应的影响加速后端冲击。进行了分析，以比较在鞭打期间在C7下表面上施加或不施加轴向加速度的情况下，每个运动段的预测总体旋转速度和分段旋转速度，最大椎间盘应力和包膜韧带应变。结果表明，在最初的150ms内，在两个条件下，每个运动段的预测节段旋转角度，椎间盘应力和囊囊应变的变化曲线重叠良好。然而，在150ms之后，没有施加轴向加速度的C2到C6的囊体应变都显着低于施加轴向加速度的C2到C6的囊体应变，但是分段旋转角和椎间盘应力仍然不受影响。这暗示着，尽管没有在C7上施加轴向加速度，但相对简单的头颈模型仍可用于有效地反映低速追尾冲击下初始阶段（即150毫秒）颈椎的生物力学响应。人体假人模型。

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