# 跳跃着陆过程中膝关节力学性能的仿真分析Biomechanical Analysis of Knee Joint during the Process of Jumping and Landing

DOI: 10.12677/MOS.2020.91009, PDF, HTML, XML, 下载: 278  浏览: 640

Abstract: The biomechanics of human knee joint during a cyclic process of jumping and landing were analyzed with unmarked motion capture system and AnyBody Modeling System™ dual camera system was used to capture motions during the process and results were further analyzed on AnyBody Modeling System™. The AnyBody software builds a model of a human lower limb musculoskeletal skeleton and it was used for simulation analysis to obtain the difference of knee biomechanics parameters under different maximum knee flexion angles during jumping and landing, and explore the relationship between them and ligament load. The simulation results showed that larger maximum knee flexion angle after landing resulted in smaller ACL load (p < 0.05), and there were significant differences in the contractile force of quadriceps femoris (p < 0.05), tendon muscle contractile force (p < 0.05) and the shear force before and after knee joint (p < 0.001) under the two experimental conditions. In the process of landing, landing at a larger knee flexion angle is conducive to reducing the impact force on the lower limbs and knees and reducing the knee joint load. Meanwhile, the antagonistic effect of quadriceps femoris contraction force and tendon muscle is also conducive to reducing the strain and load of the anterior cruciate ligament. Therefore, a large knee flexion Angle may be the right technique to avoid ACL injury during jump landing.

1. 引言

2. 实验材料和实验方法

Figure 1. Flow chart of knee load analysis during knee drop landing

Figure 2. Landing at different buckling angles

Figure 3. Schematic diagram of muscle model

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3. 实验结果及分析

AnyBody软件提供了一种预测地面反作用力的算法，使得模型在没有实际地面反作用力数据的情况下，根据运动过程预测所产生的地面反作用力。有研究表明，使用预测结果作为输入，所得到的分析结果，其水平地面反作用力，关节屈曲力矩和关节反作用力的准确度足以代替传统受力板采集的数据 [29]。

3.1. 垂直地面反作用力

Figure 4. Vertical ground reaction force changes with time

3.2. 股直肌收缩力

3.3. 腱肌收缩力

Figure 5. The contractile force of the rectus femoris varies with time

Figure 6. The contractile force of tendon muscles varies with time

3.4. 膝关节前后剪切力

3.5. 膝关节屈曲力矩

Figure 7. The change of shear force with time before and after knee joint

Figure 8. Change of knee flexion moment with time

3.6. 前交叉韧带拉力

Figure 9. Change of ACL tension with time

Table 1. The peak values of various properties of the knee under different degrees of flexion

4. 讨论

5. 结论

NOTES

*通讯作者。