中文摘要：

采用儿童骨盆有限元模型是预测汽车侧面碰撞时儿童骨盆生物力学响应的重要方法。基于6岁儿童CT图像构建了含有真实肌肉形状的6岁儿童骨盆有限元模型,利用该模型重构了儿童尸体骨盆侧面碰撞试验,仿真计算得到的力位移曲线位于尸体试验数据通道内,吻合较好。仿真得到的粘性指数VC值曲线与6岁儿童尸体试验曲线趋势一致,说明了该模型的有效性。进一步研究了不同厚度缓冲材料对骨盆损伤的影响,发现缓冲材料确实能有效降低骨盆的损伤概率。所构建的模型具有较高的生物仿真度,可为儿童骨盆碰撞损伤的仿真研究提供可靠的工具。

英文摘要：

The finite element （FE） model is a good tool to predict the pelvis biomechanical responses and injuries under lateral impacts. The FE model of a 6-year-old child pelvis with the real anatomical structure of muscles was developed based on CT images. The cadaver pelvic side impact experiments were reconstructed using the developed FE pelvic model. The force-displacement curve obtained from the simulations was consistent with the data obtained from cadaver experiments.The VC curve obtained from the simulations was also in good agreement with the experimental curve. All those results provided the validation of the FE pelvic model.The model was used to further investigate the effects of the thickness of cushion materials on pelvic injuries. The results show that the cushion material can effectively reduce the injury probability of pelvis. The developed FE pelvic model with high biofidelity is a reliable tool to simulate the pelvis impact responses and injuries.