摘要
目的研究30°仰卧位下,真人与假人接受不同量程的冲击过载条件时输出响应的变化,探讨假人替代真人进行冲击实验的可行性。方法在冲击塔上进行真人5人次,3量程(4.67,8.96,11.33G)共15次的冲击,以及HybridⅢ型汽车碰撞假人6量程(6.77,10.39,16.93,21.11,24.98,31.11G),共12次的冲击,冲击波形为脉宽40～60ms的半正弦波。实验中实时监测真人实验前、中、后心电图变化。结果真、假人的额头和胸部的输出响应随平台输入G值的增大而增大,但真人在低G冲击下动态响应变化与假人存在较为明显的差异。真人在冲击过程中有一过性心率增高,实验后迅速恢复。结论假人在一定程度上与真实人体存在差别。真人的心电图变化主要是由精神紧张引起。
Objective To study the difference between the dynamic responses of human body and human surrogate under 30° supine position, and to discuss impact probability of substituting human body with human surrogate in impact tests. Method Five volunteers experienced half-sine impact pulses, averaged 4.76, 8.96, 11.33 G, lasting for 40~60 ms on an impact tower. The human surrogate was exposed to half-sine impact pulses, averaged 6.77,10.39, 16.93,21.11, 24.98, 31.11 G, lasting for 40~60 ms, two times for each G level. ECG changes of the volunteers were continuously monitored before, during and after each impact. Result Output responses at forehead and chest of human body and human surrogate increased with input increments. But there was obvious difference of the dynamic responses between human body and the surrogate to impact of low G levels. Heart rate of each volunteer had temporary increase during the process of impact, and returned to normal level soon after the impact. Conclusion There is difference in a certain extend between the dynamic responses of human body and human surrogate. The ECG changes are induced mainly by mental stress during process of impact.
出处
《航天医学与医学工程》
CAS
CSCD
北大核心
2005年第2期84-88,共5页
Space Medicine & Medical Engineering
基金
总装备部实验技术重点课题(01103301)
关键词
加速度
冲击
人体替代品
动态响应
acceleration
impacts
human surrogate
dynamic response
