Three-dimensional response of a lumped parameter head-neck model due to impact and impulsive loading.
Three-dimensional response of a lumped parameter head-neck model due to impact and impulsive loading.
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DOI：
10.1016/0021-9290(84)90126-x
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发表时间：
1984
影响因子：
2.4
通讯作者：
T. Merrill;W. Goldsmith;Y. Deng
中科院分区：
文献类型：
--
作者：
T. Merrill;W. Goldsmith;Y. Deng
先前开发的用于预测人体头颈系统由于冲击和脉冲负载而产生的矢状面运动的数值程序已扩展到三个维度。在这两种情况下，都采用集中参数方法，但当前模型将每个椎间关节的机械响应集中到单个力-变形关系中，该关系是根据各个研究人员组装的机械特性进行评估的。进行计算以获得模型对二维屈曲扭伤情况、对颅骨侧面撞击的三维情况以及对另一种涉及垂直于矢状面的基础加速度的情况的响应。运动学变量与之前的二维分析结果和志愿者跑步的实验数据的一致性是令人满意的，但在与物理模型和志愿者在承受规定载荷时获得的数据进行比较时，发现三维预测的一致性较差。响应差异归因于模型相对于结构和志愿者的小面分离刚度较高、阻尼不足以及原型和数值模型部件的机械变形特性存在显着差异。
A numerical procedure developed previously for predicting sagittal-plane motion of the human head-neck system due to impact and impulsive loading has been extended to three dimensions. In both situations, a lumped parameter approach is employed, but the current model lumps the mechanical response of each intervertebral joint into a single force-deformation relation evaluated from mechanical properties assembled by various investigators. Computations were performed to obtain the response of the model to a two-dimensional case of flexion whiplash, to one three-dimensional case of side impact to the skull and to another involving base acceleration normal to the sagittal plane. Agreement of the kinematic variables with the results of both the previous two-dimensional analysis and experimental data from a volunteer run is satisfactory, but somewhat poorer correspondence was found for the three-dimensional predictions upon comparison with data obtained from a physical model and from a volunteer when subjected to the prescribed loading. The differences in response are attributed to higher stiffness of facet separation of the model relative both to the structure and the volunteer, to insufficient damping, as well as to substantial differences in the mechanical deformation characteristic of the components of the prototypes and the numerical model.