基于OpenSim人体步行腓肠肌静态生物力学分析

为准确、快速地研究人体下肢运动规律,构建人体下肢模型。针对该模型推导出了人体步行状态下腓肠肌相应的力学方程F_1(t)。利用OpenSim搭建人体骨骼肌肉模型,并以腓肠肌进行静态力学分析为例,解析了肌肉在逆向运动学(IK)和残差缩减(RRA)两种不同分析方法中的肌肉激活度和力矩。研究结果表明:此模型能准确地模拟人体下肢肌肉的运动规律,利用RRA分析能够真实反映腓肠肌的受力情况,分析出肌肉激活度,为进一步揭示膝关节和踝关节的生物力学特性和为设计人体下肢康复机器人提供肌肉阻尼奠定基础。

Static biomechanical analysis of human walking gastrocnemius muscle based on OpenSim

In order to accurately and quickly study the law of human lower extremity movement, the human lower limb model was constructed. The corresponding mechanical equation F1(t) of the gastrocnemius muscle in human walking state was derived. The OpenSim was used to build the human skeletal muscle model, and the static force of the gastrocnemius muscle was used. As an example, the muscle activation and torque of muscle in IK and RRA are analyzed. The results show that this model can accurately simulate the movement law of human lower limb muscles, and can accurately reflect the gastrocnemius muscle by RRA analysis. In the case of force, the muscle activation degree a is analyzed to lay a foundation for further revealing the biomechanical properties of the knee joint and the ankle joint and providing muscle damping for designing the human lower limb rehabilitation robot.