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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 investigate the damage caused by + Gx landing impact, 22 dogs in supine position underwent 10 ~ 60Gx, 30 ~ 100ms impact and recorded the impact of platform, animal chest and spine acceleration and ECG, respiration, intracardiac pressure, chest Internal pressure, intra-abdominal pressure, body displacement and other indicators. The results showed that under the effect of + Gx, extensive visceral injuries dominated by lung and heart appeared. In the impact of the right atrium, right ventricle and thoracoabdominal pressure were significantly increased. Chest response acceleration overshoot, spinal acceleration lower than the input response. Chest maximum relative compression of 44%. When the peak acceleration of the chest> 60G, 0.03s, recoverable moderate injury. The result of the experiment is meaningful for the development of landing impact protection measures.