三岁儿童头部有限元模型的建立及验证

Development and Validation of Three-year-old Child Head FE Model

运用ANSYS ICEM CFD和HYPERMESH软件建立了三岁儿童头部的具有高度解剖学细节的有限元模型。模型由大脑、胼胝体、小脑、脑干、脑镰、脑幕、脑脊液(包含软脑膜和蛛网膜)、硬脑膜、颅骨和头皮组成。运用MADYMO软件对一典型跌落事故进行重建,并在LS-DYNA中进行仿真分析。结果表明,颅内压力呈明显的梯度分布,且符合线性加速度理论,故所建的模型可用于后续深入的损伤生物力学研究。

A highly anatomically detailed finite element model for three-year-old child head is built with ANSYS ICEM CFD and HYPERMESH softwares. The model consists of cerebrum, corpus callosum, eerebellum, brainstem, falx, tentorium, cerebro-spinal fluid with pia-arachnoid complex, dura mater, skull and scalp. A typical falling down accident is reconstructed using software MADYMO and a simulation is conducted with LS-DYNA. The results show that the intracranial pressure exhibits apparent gradient distribution, confirming to linear acceleration theory, so the model built can be used for the follow-up in-depth research in injury biomechanics.