Shanahan D F, Mastroianni G R
Aviat Space Environ Med. 1984 Jan;55(1):32-40.
All accident reports involving U.S. Army OH-58 series helicopters were analyzed to determine vertical and horizontal velocity change at impact and the relationship of this kinematic data to the production of spinal injury. This analysis determined that spinal injury is related primarily to vertical velocity change at impact and is relatively independent of horizontal velocity change. The dramatic increase in the rate of spinal injury occurring just above the design sink speed of the aircraft landing gear (3.7 m/s) suggests that the fuselage and seat provide little additional impact attenuation capability above that of the gear alone. It is concluded that if this aircraft were modified to provide protection to the occupants for impacts up to 9.1 m/s (30 ft/s), approximately 80% of all spinal injury incurred in survivable accidents could be substantially mitigated. The incorporation of energy absorbing seats is recommended.
对所有涉及美国陆军OH - 58系列直升机的事故报告进行了分析，以确定撞击时垂直和水平速度的变化，以及这些运动学数据与脊柱损伤产生之间的关系。该分析确定，脊柱损伤主要与撞击时的垂直速度变化有关，且相对独立于水平速度变化。在飞机起落架设计下沉速度（3.7米/秒）之上，脊柱损伤发生率急剧增加，这表明机身和座椅在单独起落架的缓冲能力之上，几乎没有提供额外的撞击衰减能力。得出的结论是，如果对该飞机进行改装，使其能够为乘客提供高达9.1米/秒（30英尺/秒）撞击的保护，那么在可幸存事故中发生的所有脊柱损伤中，约80%可得到大幅减轻。建议采用能量吸收座椅。
