Abstract: In order to study the characteristics of human body dynamic responses to impact acceleration during manned spacecraft landing, 5 healthy young men were exposed to 4～10 g for 50～80ms halfsine acceleration pulse in 20° supine angle and 10 g for 50ms halfsine acceleration pulse in 30°～60° supine angle. The acceleration curves on the impact tower,the seat,the human head,shoulder,chest and ilium, as well as ECG of the subject were recorded during the impact experiment. The relation between human body dynamic response and level of the landing impact and relation between it and supine angle were obtained by regression analysis.These experimental results provide scientific basis for the protection of human body from impact injuries and the construction of human body dynamic models.

Key words: manned spacecr aft, landing impact, dynamic responses