使用肌负荷极限来评估非生理学肌肉骨模型变形和Hill型肌肉参数选择
Lennart V Nölle1, Isabell Wochner2, Maria Hammer1
1Institute for Modelling and Simulation of Biomechanical Systems (IMSB), University of Stuttgart, Stuttgart, Germany.
PloS one
|November 14, 2024
概括
这项研究引入了一种使用肌肉和肌应变来检测肌肉骨模型错误的新方法. 这种方法可以识别错误的肌肉参数和骨变形等问题,确保更准确的人体模拟.
科学领域:
- 生物力学 生物力学
- 计算生物学 计算生物学
- 人体建模 人体建模
背景情况:
- 肌肉骨模拟对于理解人类生物力学至关重要.
- 准确的模拟取决于精确的肌肉校准和骨完整性.
- 这些领域的不一致性可能导致生理学上无效的结果.
研究的目的:
- 提出一种用于检测肌肉骨模型中的建模和参数化不一致性的方法.
- 使用肌肉元素作为传感器来识别结构和参数校准问题.
- 评估模拟动力学和力量的生理学有效性.
主要方法:
- 模拟了两个常见的建模错误:内部骨变形和肌肉参数校准错误.
- 使用了THUMS AM50乘客模型和OpenSim gait2354模型.
- 评估了肌肉和肌应变损伤的模拟,使用既定的标准和一种新的方法来确定肌应变值.
主要成果:
- 检测到肌肉伸展器肌肉的肌肉张力损伤,这是由于在重新定位时的非生理肘部关节间隙 (12.92毫米).
- 鉴定了肌肉和肌筋疲劳损伤在肌肉中部胃角肌从减少肌松的长度,导致过度的前应变.
- 证明了该方法能够量化内部扭曲并评估肌肉参数可信性的能力.
结论:
- 拟议的应变损伤评估方法有效地识别了肌肉骨模型中的不一致性.
- 强调精确的肌肉参数校准和骨结构完整性的重要性.
- 为避免常见错误和改进人类肌材料特征数据提供了洞察力.
相关概念视频
Deformation of Member under Multiple Loadings
157
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...
157
Temperature Dependent Deformation
140
In a nonhomogeneous rod made up of steel and brass, restrained at both ends and subjected to a temperature change, several steps are involved in calculating the stress and compressive load. Due to the problem's static indeterminacy, one end support is disconnected, allowing the rod to experience the temperature change freely. Next, an unknown force is applied at the free end, triggering deformations in the rod's steel and brass portions. These deformations are then calculated and added...
140
Impact Loading
186
Impact loading occurs when a moving object collides with a stationary structure, such as a rod with a uniform cross-sectional area fixed at one end. Under these conditions, the rod absorbs the kinetic energy from the striking object, leading to deformation and subsequent stress development. As the rod returns to its original position and reaches maximum stress, the absorbed energy, initially manifested as kinetic energy, transforms entirely into strain energy.
In cases of elastic deformation,...
In cases of elastic deformation,...
186
Generalized Hooke's Law
833
The generalized Hooke's Law is a broadened version of Hooke's Law, which extends to all types of stress and in every direction. Consider an isotropic material shaped into a cube subjected to multiaxial loading. In this scenario, normal stresses are exerted along the three coordinate axes. As a result of these stresses, the cubic shape deforms into a rectangular parallelepiped. Despite this deformation, the new shape maintains equal sides, and there is a normal strain in the direction of the...
833


