Kim Jong-Eun, Li Zuoping, Ito Yasushi, Huber Christina D, Shih Alan M, Eberhardt Alan W, Yang King H, King Albert I, Soni Bharat K
Department of Mechanical Engineering, University of Alabama at Birmingham, Hoehn 330B, Birmingham, AL 35294, USA.
J Biomech. 2009 Sep 18;42(13):2191-5. doi: 10.1016/j.jbiomech.2009.06.010. Epub 2009 Jul 30.
A finite element (FE) model of a 10-years-old child pelvis was developed and validated against experimental data from lateral impacts of pediatric pelves. The pelvic bone geometry was reconstructed from a set of computed tomography images, and a hexahedral mesh was generated using a new octree-based hexahedral meshing technique. Lateral impacts to the greater trochanter and iliac wing of the seated pelvis were simulated. Sensitivity analysis was conducted to identify material parameters that substantially affected the model response. An optimization-based material identification method was developed to obtain the most favorable material property set by minimizing differences in biomechanical responses between experimental and simulation results. This study represents a pilot effort in the development and validation of age-dependent musculoskeletal FE models for children, which may ultimately serve to evaluate injury mechanisms and means of protection for the pediatric population.
建立了一个10岁儿童骨盆的有限元（FE）模型，并根据小儿骨盆侧撞的实验数据进行了验证。骨盆骨几何结构由一组计算机断层扫描图像重建而成，并使用一种基于八叉树的新型六面体网格划分技术生成了六面体网格。模拟了对坐姿骨盆大转子和髂翼的侧撞。进行了敏感性分析，以确定对模型响应有重大影响的材料参数。开发了一种基于优化的材料识别方法，通过最小化实验和模拟结果之间的生物力学响应差异来获得最有利的材料属性集。本研究是开发和验证儿童年龄相关肌肉骨骼有限元模型的初步尝试，最终可能有助于评估小儿群体的损伤机制和保护手段。
