救生伞垂直着陆速度限值的确定

The Determination of the Vertival Landing Speed Limit of Life Parachutes

本文论述了提高和降低救生伞的垂直落速所导致的种种不利的后果,并明确地指出了着陆姿态在跳伞过程中所起的重要作用。正确的着陆姿态能充分地利用身体的自缓冲能力,能耐受比较大的垂直着陆速度而不受伤;相反,着陆姿态不正确或不完全正确,即使垂速比较小也难免受伤。因此在确定人体对垂速的耐力时,必须把着陆姿态考虑进去。并根据损伤概率,合理地确定出垂速的最佳耐受范围并结合我国的跳伞实践经验规定6m/s 速度作为我国救生伞垂直着陆速度的限值。

This paper describes various harmful consequences resulted from incr- reasing or decreasing the vertical landing speed fof ei parachutes and clea- rly points out that the landing Posture plays an important rolein the course of landing.The body′s self-buffering function can be perfectly used and rather high vertical landing speed can be tolerated without injury when in a correct landing posture;conversely,when in an incorrect inj- ury can be caused easily,even if the landing speed is low.The landing posture musti be considered in determining human tolerance to the ive- rtical landng speed.A optimum toler- leancimt to the vertical landing speed is defined as 6m/s in the present paper,which is established on the asis of injury probability andby our country′s long experiences in life parachutes.