开发,校准和验证冲击特定的椎脊柱模型:一种使用混合多体和有限元素方法的新方法
Thomas Holzinger1, Dario Cazzola2, Benedikt Sagl1
1Competence Center Artificial Intelligence, University Clinic of Dentistry, Medical University of Vienna, Vienna, 1090, Austria; Center for Clinical Research, University Clinic of Dentistry, Medical University of Vienna, Vienna, 1090, Austria.
Computer methods and programs in biomedicine
|September 24, 2024
概括
这项研究开发了一种新的混合脊柱模型,用于模拟高动态轴冲击,这对于了解体育伤害至关重要. 经过验证的模型准确地预测了撞击期间的脊柱动力学和应力分布.
科学领域:
- 生物力学 生物力学
- 计算建模计算建模
- 脊髓损伤研究研究脊髓损伤研究
背景情况:
- 体育运动中的高轴冲击场景可能会导致严重的椎脊椎损伤.
- 现有的有限元 (FE) 和肌肉骨模型在计算成本和软组织数据方面存在局限性.
- 准静态测试不能准确地代表动态冲击期间的组织行为.
研究的目的:
- 开发,校准和验证一个特定于撞击的混合体,刚性身体-FE脊柱模型.
- 提高对高动态轴冲击场景中脊柱损伤机制的理解.
- 克服影响分析当前建模技术的局限性.
主要方法:
- 使用了五种猪椎脊柱模型进行体外实验.
- 通过匹配in-vitro和in-silico动力学来校准脊椎间关节的参数.
- 进行了五倍交叉验证,并分析了FE盘中的Von Mises应力.
主要成果:
- 混合模型的校准和验证显示与体外实验的良好一致.
- 应力分布分析显示,上盘的前部最大应力明显,其他盘的后部最大应力明显.
- 该模型成功复制了实验动力学.
结论:
- 开发的混合方法强调了对脊柱损伤的冲击特定建模的必要性.
- 这种方法提高了识别脊柱损伤机制的能力.
- 方便创建动态,影响特定的计算模型用于研究.
相关概念视频
01:11Deformation of Member under Multiple Loadings
When a rod is made of different materials or has various cross-sections, it must be divided into parts that meet the necessary conditions for determining the deformation. These parts are each characterized by their internal force, cross-sectional area, length, and modulus of elasticity. These parameters are then used to compute the deformation of the entire rod.
In the case of a member with a variable cross-section, the strain is not constant but depends on the position. The deformation of an...
In the case of a member with a variable cross-section, the strain is not constant but depends on the position. The deformation of an...
01:15Deformation of a Beam under Transverse Loading
Understanding beam deflection, particularly for indeterminate beams with overhanging segments and multiple concentrated loads, is crucial for ensuring structural integrity and functionality. The process begins with constructing an accurate free-body diagram, which helps identify the forces and moments acting on the beam. This diagram is vital for visualizing how bending moments vary along the beam's length, influencing its curvature.
The insights from the bending moment diagram extend to...
The insights from the bending moment diagram extend to...