基于有限元模型的颈椎运动和头部承重的性别差异。

Yuvaraj Purushothaman, Narayan Yoganandan
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引用次数: 4

摘要

虽然许多研究通过实验、临床调查、建模和流行病学研究来描述性别在后部碰撞中的作用,但增加的头部质量对节段运动的影响却很少受到关注。本研究的目的是确定头部支撑物对颈椎节段运动和后部冲击载荷的作用。本研究采用有限元模型。对模型进行了网格收敛研究。将后冲击加速度脉冲作用于脊柱基部,用人体尸体实验数据进行了验证。在脊柱下轴的所有水平上,对男性和女性的脊柱以及是否使用军队战斗头盔进行了比较。为此,采用节段运动、力和弯矩作为生物力学参数。结果表明,女性脊柱的运动响应比男性增加,并且在所有水平上,头盔的存在增加了男性和女性脊柱的运动和负荷。给出了数值数据。头部支撑的肿块影响脊柱各层次的反应。目前的计算建模研究,从男性脊柱的一种几何形状和女性脊柱的一种几何形状(局限性在文中得到了解决),提供了对头部支撑质量存在的内部载荷传递机制的见解,这种机制普遍存在于某些平民职业和现役军人中。
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Gender Differences in Cervical Spine Motions and Loads With Head Supported Mass Using Finite Element Models.

While many studies have been conducted to delineate the role of gender in rear impact via experiments, clinical investigations, modeling, and epidemiological research, the effect of the added head mass on segmental motions has received less attention. The objective of the study is to determine the role of the head supported mass on the segmental motions and loads on the cervical spinal column from rear impact loading. The study used finite element modeling. The model was subjected to mesh convergence studies. It was validated with human cadaver experimental data by applying the rear impact acceleration pulse to the base of the spine. At all levels of the subaxial spinal column, a comparison was made between male and female spines and with and without the use of an army combat helmet. For this purpose, segmental motions, forces, and bending moments were used as biomechanical parameters. Results showed that female spines responded with increased motions than males, and the presence of a helmet increased motions and loads in males and female spines at all levels. Numerical data are given. Head supported mass affects spine responses at all levels. The present computational modeling study, from one geometry for the male spine and one geometry for the female spine (limitations are addressed in the paper), provided insights into the mechanisms of the internal load transfer with the presence of head supported mass, prevalent in certain civilian occupations and active-duty Service members in the military.

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