摘要
为了探讨＋Ｇｘ着陆冲击造成损伤的特点，２２只家犬以仰卧姿势承受了１０～６０Ｇｘ，３０～１００ｍｓ的冲击，记录了冲击平台、动物胸部、脊柱的加速度和ＥＣＧ、呼吸、心内压、胸内压、腹内压、身体位移等指标。结果表明，在＋Ｇｘ冲击作用下出现以肺脏、心脏为主的广泛内脏损伤。在冲击时右心房、右心室和胸腹内压都明显增加。胸部响应加速度发生超调，脊柱响应加速度低于输入。胸最大相对压缩量为４４％。当胸部加速度峰值＞６０Ｇ、０．０３ｓ时，出现可恢复性中度损伤。实验结果对制定着陆冲击防护措施的研究是有意义的。
In order to study the characteristics of injury caused by +Gx
landingimpact in animals, 22 dogs were exposed to 10～60Gx ,30～100ms in supine position.
Accelerations of impact platform ,thorax and spine , as well as ECG , breathing , intracar- diac ,
intrathoracic ,and intraabdominal pressures and thoracic displacement were record-ed. The
results showed that the majority of viscera , especially lungs and heart, were in-jured.
Pressure increased in right atrium , sright ventricle , stomach and esophagus during+Gx
impact. There was over-shoot of acceleration at thorax but response at spine waslower than the
inpu. Thorax was compressed by 44%. Mild reversible injuries appearedin thorax when
acceleration exceeded 60Gx,0.03s. The results might provide referencefor studies on the
mechanism of impact injury.
出处
《航天医学与医学工程》
CAS
CSCD
1994年第3期157-162,共6页
Space Medicine & Medical Engineering
关键词
加速度
冲击损伤
着陆冲击
Gx acceleration , impact damage , impact tolerance ,
landing impact,dynamic response
