MacGregor D, Hull M L
J Biomech. 1985;18(4):267-75. doi: 10.1016/0021-9290(85)90844-9.
A hierarchy of release decision theories for both tibia fracture and knee ligamentous injury are defined and simulated on a computer. Moment loading data, recorded during actual skiing by the microcomputer-based ski binding system described in Part I, are processed by the various release decision theories. At the bottom of the hierarchy is the simplest theory which treats boot loading as quasi-static and compares moment components to threshold levels. Another stage of the hierarchy defines an analytic expression for a combined loading failure locus. Note that this is the first formulation of a combined loading release decision theory. Yet another stage of the hierarchy computes bone moments via dynamic system leg models. The various release decision theories are evaluated by comparing processed results to both pain and bone failure limits. For the data generated by the field tests conducted to date, the simplest release decision theory satisfied the retention requirement for pain limits in the presence of muscle activity for both torsion and forward bending. For pain limits in the absence of muscle activity the retention requirement was not satisfied however. Another result is that leg dynamics are significant. A final result is that combined loading considerations lead to a more conservative theory.
针对胫骨骨折和膝关节韧带损伤，定义了一个释放决策理论层次结构，并在计算机上进行了模拟。第一部分中描述的基于微型计算机的滑雪固定系统在实际滑雪过程中记录的力矩加载数据，由各种释放决策理论进行处理。层次结构的底层是最简单的理论，该理论将靴子加载视为准静态，并将力矩分量与阈值水平进行比较。层次结构的另一个阶段定义了组合加载失效轨迹的解析表达式。请注意，这是组合加载释放决策理论的首次表述。层次结构的又一个阶段通过动态系统腿部模型计算骨力矩。通过将处理结果与疼痛和骨失效极限进行比较，对各种释放决策理论进行评估。对于迄今为止进行的现场测试所生成的数据，最简单的释放决策理论在存在肌肉活动的情况下，对于扭转和向前弯曲，满足了疼痛极限的保留要求。然而，在没有肌肉活动的情况下，对于疼痛极限，保留要求未得到满足。另一个结果是腿部动力学很重要。最后一个结果是，组合加载考虑导致了一个更保守的理论。
