Human running on damped surfaces: theoretical strategies for adjusting leg impact mechanics
Human running on damped surfaces: theoretical strategies for adjusting leg impact mechanics
复制标题
人体在阻尼表面上跑步：调整腿部冲击力学的理论策略
DOI：
10.1016/j.proeng.2012.04.144
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发表时间：
2012
期刊：
影响因子：
--
通讯作者：
Tsui F
中科院分区：
文献类型：
--
作者：
Tsui F
一个简单的弹簧质量模型可以提供对人类跑步力学的洞察，并有助于确定跑步速度，表面刚度和表面高度变化的应对机制。然而，以前的研究假设，没有能量损失，在每一步，即使大多数运动表面返回只有一小部分的能量存储在前一半的影响，根据其阻尼特性。当在阻尼表面上跳跃时，与无阻尼表面相比，人类在着陆时更弯曲，在起飞时更伸展。本研究调查了这种策略在跑步过程中的使用。在Matlab中建立了一个弹簧-质量运行模型，并在固定刚度但可变阻尼的表面上进行了分析。使用一系列的运行速度（2 - 6 más-1），腿弹簧刚度（5 - 50 kNám-1）和收缩角（50 - 80¼），获得了无阻尼表面的稳定区域。然后引入阻尼，并记录新的稳定区域和能量损失。然后修改触地时的腿弹簧长度（以及质心高度），并评估该策略补偿与阻尼相关的能量损失的程度。这些结果为在阻尼表面上跑步的能量成本提供了理论见解。在未来的工作中，这些结果将与人类跑步进行比较，以确定该模型反映人类应对策略的准确程度。
A simple spring-mass model can provide insight into human running mechanics and help determine coping mechanisms for changes in running velocity, surface stiffness and surface height. However, previous research assumed that no energy was lost in each step even though most sports surfaces return only a fraction of the energy stored during the first half of impact according to their damping characteristics. When hopping on damped surfaces, humans were found to be more flexed during landing and more extended at take-off compared to undamped surfaces. This study investigated the use of this strategy during running. A spring-mass running model was developed in Matlab and analysed on a surface of fixed stiffness but variable damping. Using a range of running velocities (2 – 6 más-1), leg spring stiffness’ (5 – 50 kNám-1) and retraction angle (50 – 80¼), stable regions for a surface without damping were obtained. Damping was then introduced and the new stable regions and energy losses recorded. Leg spring lengths (and hence centre-of-mass heights) at touchdown were then modified and the extent to which this strategy compensated for the energy losses associated with damping was assessed. These results have provided a theoretical insight into the energetic costs of running on damped surfaces. In future work, these results will be compared to human running to determine how accurately the model reflects human coping strategies.
影响因子：
2.4
作者：
BLICKHAN, R
通讯作者：
BLICKHAN, R
影响因子：
2.4
作者：
Ferris, DP;Liang, KL;Farley, CT
通讯作者：
Farley, CT