人体弹射加速度的耐力研究

Human Tolerance to Ejection Acceleration

本文介绍了如何利用所建模型确定人体对弹射加速度的耐力。人体耐力以椎骨损伤概率作指标,并将系统最大超调量与椎骨的破坏强度相结合以确定人体的耐力限度。人体响应为18.5G、21.7G、25.7G时,椎骨破坏概率为5%、50%、95%。根据人体模型的动力特性表明,人体最大超调为50%,因而得到人体耐受弹射加速度值分别为12G、14G、17G以及相应的ΔV值。文中还分析了所建模型与DRI模型的关系,二者是不同途径得到的同一结果。

Utilizing data measured from seat and human body during human ejection tests, a human dynamic model was developed. It is an one-degree-of-freedom model. The reliability of the model prediction was confirmed by repeating human tests. The way of using the model to determine the tolerance of human body to ejection acceleration was discussed. Human tolerance was defined by injury probability of vertebrae. Limits of human tolerance were determined by combining the dynamic characteristics ofthe system with breaking strength of vertebrae. Breaking loads of vertebrae at injury probabilities of 5, 50, 95 were found to be 18.5, 21.5 and 25.7G, respectively. According to mathematic model,the maximum overshot was 50, so the corresponding ejection acceleration G levels were 12, 14 and 17G respectively. This model is the same as DRI model, but they were deduced from different ways.