密质骨建模方式对国人第95百分位骨盆生物力学响应的影响  

Effects of Cortical Bone Modeling Methods on Biomechanical Responses of Chinese 95^(th) Percentile Pelvis Finite Element Model

作　　者：崔世海[1,2] 陈威佐 李海岩 贺丽娟[1,2] 吕文乐 CUI Shihai;CHEN Weizuo;LI Haiyan;HE Lijuan;LU Wenle(College of Mechanical Engineering,Tianjin University of Science and Technology,Tianjin 300457,China;International Research Association on Emerging Automotive Safety Technology,Tianjin 300457,China)

机构地区：[1]天津科技大学机械工程学院,天津300457 [2]现代汽车安全技术国际联合研究中心,天津300457

出　　处：《医用生物力学》2025年第1期187-193,共7页Journal of Medical Biomechanics

摘　　要：目的 构建国人第95百分位具有真实解剖学结构的骨盆有限元模型,探究密质骨建模方式对真实骨盆整体生物力学响应的影响。方法 基于第95百分位男性志愿者骨盆医学影像数据,构建以六面体单元为主的具有真实髋骨密质骨厚度(REA-M)和2 mm均匀密质骨厚度(CON-M)骨盆有限元模型,采用仿真方法重构尸体试验加载工况,通过对比尸体试验结果和仿真结果验证模型的有效性,并探究两种模型在不同工况下的生物力学响应差异。结果 仿真结果表明,两种骨盆模型的整体力学响应与尸体试验结果存在较强相关性,且两种模型之间的力学响应差距多在8%之内,二者的相关性评分差值小于2%。结论 通过重构多个仿真试验验证了本文所建CON-M和REA-M两种骨盆模型的有效性,两种模型的生物力学响应有差异,但力学响应差异较小。从简化模型的角度,可以使用CON-M模型研究骨盆的生物力学响应。Objective The finite element pelvis model with detailed anatomical structures which meets the Chinese human th 95 percentile characteristics is developed,and the influence of cortical bone modeling method on the biomechanical response of the real pelvis is explored.Methods Based on the pelvic medical images of a th 95 percentile male volunteer,two finite element pelvis models with real hip bone cortical bone thickness(REA-M)and 2 mm uniform cortical bone thickness(CON-M)dominated by hexahedral elements were constructed.Using the simulation method to reconstruct the loading conditions of cadaver experiments,the validation of models was verified by comparing the cadaver experimental results and simulation results,and biomechanical response differences of two models under different working conditions were discussed.Results The simulation data showed that there was a strong correlation between the overall biomechanical responses of two pelvic models and the cadaver experiment,and the mechanical response difference between two models was mostly within 8%,and the correlation score difference between two models was smaller than 2%.Conclusions The validation of two pelvic models established in this study is verified by rebuilding multiple simulation experiments.Although the biomechanical responses of CON-M and REA-M models were different,the difference was small.From the perspective of model simplification,the CON-M model can be used to study the biomechanical response of the pelvis.

关 键 词：国人第95百分位骨盆有限元模型 高生物仿真度 仿真试验 密质骨厚度 生物力学响应 

分 类 号：R318.01[医药卫生—生物医学工程]