肌肉生物仿真度对六岁儿童胸部碰撞生物力学响应的影响

发布时间：2018-10-19 20:30

【摘要】：由于可用于实验的儿童尸体的缺乏,采用具有较高生物仿真度的胸部有限元模型是研究儿童胸部损伤机理的重要手段。在已验证有效性的6岁儿童胸部有限元模型基础上构建了等效肌肉模型和具有真实几何形状的肌肉模型,通过重构儿童胸部正碰尸体实验分析肌肉生物仿真度对胸部损伤的影响。对比实验结果表明,等效肌肉模型的胸部接触力、胸部最大压缩量和肋骨最大范梅塞斯应力稍大于真实肌肉模型;心脏和肺的最大主应变都略小于真实肌肉模型;真实肌肉模型曲线与尸体实验通道的相关性要大于等效肌肉模型。通过以上对比,本文研究结果认为具有真实几何形状肌肉的儿童胸部有限元模型应该能更准确地反映胸部受到碰撞时的生物力学响应。
[Abstract]:Due to the lack of cadavers which can be used in experiments, it is an important method to study the mechanism of thoracic injury in children by using the chest finite element model with high biologic imitation. An equivalent muscle model and a muscle model with real geometric shape were constructed on the basis of the verified validity of the finite element model of the chest of 6 years old children. The effect of muscle biological imitation on chest injury was analyzed by reconstructing children's chest positive cadavers. The experimental results show that the chest contact force, the maximum compression of the chest and the maximum Vameses stress of the rib in the equivalent muscle model are slightly higher than those in the real muscle model, and the maximum principal strain in the heart and lung is slightly smaller than that in the real muscle model. The correlation between the true muscle model curve and the cadaveric experimental channel was greater than that of the equivalent muscle model. Through the above comparison, it is concluded that the finite element model of the chest of children with real geometric muscles should be able to reflect more accurately the biomechanical response of the chest when it is collided.
【作者单位】：天津科技大学机械工程学院;天津市轻工与食品工程机械装备集成设计与在线监控重点实验室;
【基金】：国家自然科学基金(81201015,81371360,81471274)
【分类号】：R318.01

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