6岁儿童胸部改进人体模型的建立与验证

目的 提升MADYMO儿童人体模型中原始胸部柔体模型的生物仿真度，深入研究儿童乘员胸部各部位损伤。方法 采用CT图像逆向建模方法，建立6岁儿童胸部有限元模型。通过替换MADYMO假人库中6岁儿童人体模型的柔体胸部，建立带有胸部生物力学模型的改进人体模型。模型采用Kroell成人胸部碰撞试验的Irwin与Mertz缩放通道法，以及Ouyang的儿童尸体胸部冲击试验联合验证。结果 所建胸部模型的响应与缩放通道法和尸体试验数据都较为吻合，胸部模型比原始柔体模型更加准确，且在回弹阶段与尸体试验吻合。结论 所建模型有效性得到验证，可进一步用于车辆正面碰撞乘员损伤的研究。
Objective To improve the biological fidelity of the thorax flexible body in the original MADYMO child human model, so as to further study pediatric thorax injuries of child occupant. Methods A finite element model of the six-year-old pediatric thorax was built by adopting the method of reverse modeling based on CT images. By replacing the thorax model with flexible body in MADYMO six-year-old human model, an improved human model containing biomechanical thorax model was developed. The model was verified by joint validation of two tests, including Kroell’s adult chest impact experiment combined with Irwin and Mertz’s scaling method, and Jun Ouyang’s thoracic impact test on pediatric cadavers. Results The response of this established thorax model was in good agreement with scaling method and cadaver test data, and the thorax model was much more accurate than the original flexible body model. The resilience of simulation model was consistent with cadaver test. Conclusions The validity of the model is verified, and can be further used in occupant injury analysis in vehicle frontal crash.