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关于脊椎间盘建模的FEM比较研究:Holzapfel-Gasser-Ogden与结构杆相比
Gabriel Gruber1, Luis Fernando Nicolini2, Marx Ribeiro3,4
1Department of Diagnostic and Interventional Neuroradiology, School of Medicine and Health, Klinikum rechts der Isar, Technical University of Munich, Munich, Germany.
Frontiers in bioengineering and biotechnology
|June 21, 2024
概括
与钢筋模型相比,Holzapfel-Gasser-Ogden (HGO) 纤维模型为人类椎间盘 (IVD) 生物力学提供了更准确的模拟. 这项研究强调了HGO作为精确的IVD有限元模型的优越选择.
科学领域:
- 生物力学 生物力学
- 计算建模计算建模
- 脊柱研究研究 脊柱研究
背景情况:
- 椎间盘 (IVD) 的精确数值建模是复杂的,因为它的结构异质.
- 代表环状纤维纤维对于理解IVD生物力学至关重要.
- 现有的模型需要仔细选择构成模型和材料特性.
研究的目的:
- 在人类IVD有限元素 (FE) 模型的纤维环中比较分析不同的纤维增强方法.
- 评估Holzapfel-Gasser-Ogden (HGO) 纤维模型的准确性和效率,与线性弹性和超弹性钢筋元素模型相比.
主要方法:
- 使用重建的L4-L5 IVD几何结构用于FE建模.
- 我们比较了三种光纤建模方法:HGO,线性钢筋和非线性钢筋模型.
- 进行了灵敏度分析,使用基因算法对实验室运动范围 (RoM) 数据进行校准,并通过静脉内压力 (IDP) 和额外的RoM数据进行验证.
主要成果:
- 敏感性分析确定了影响RoM和IDP的关键参数.
- 在HGO纤维模型显示最高的精度后校准 (R2=0.95) 和验证 (RoM R2=0.85;IDP R2=0.87).
- 在验证过程中,杆模型的准确性较低 (RoM R2=0.71-0.69; IDP R2=0.86-0.8).
结论:
- 在模拟人类IVD生物力学方面,HGO纤维模型表现出卓越的保真性和准确性.
- 校准过程成功地将模拟结果与实验数据对齐.
- 推HGO模型用于准确且计算效率高的IVD FE建模.
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