第693章 冲击试验

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  “林总,航天员那边的情况怎么样?”
    秦老递过一个安全帽,林希接过戴好,回道。
    “一切顺利,乘组基本成型了。”
    “人没掉链子,机器更不能掉链子。”
    秦老伸手拍了拍身旁的巨大铁架,
    “飞船回来,进入大气层,开伞,这一路都有惊险。”
    “可真到了落地前的那一秒,那是硬碰硬的鬼门关。”
    林希看向塔顶的吊钩。
    降落伞能减速,但不能把速度降到零。
    返回舱重达三吨,哪怕主伞完全打开,落地瞬间的垂直速度依旧能达到每秒八米左右。
    这等于连人带铁罐头,直接从两层楼高的地方硬生生砸在地上。
    “如果没有反推发动机在落地前点火缓冲,航天员坐立的姿态承受这种刚性撞击,内脏会瞬间受损破裂。”
    秦老指着地上的白灰框,
    “我们要在这里,做全工况着陆冲击试验。”
    “把各种极端条件全测一遍。”
    白灰框里,挖掘机已经挖出了一个深达五米的大坑。
    华清大学岩土力学刘教授踩着泥步走过来。
    他手里抱着厚厚一叠数据表,上面沾满泥点子。
    “林总,秦总,土样配方定好了。”
    刘教授翻开本子。
    林希凑过来看。
    上面是一条条土层压力曲线和含水率数据。
    “飞船按计划是在内蒙古四子王旗区域着陆。”
    刘教授指着第一页的曲线图,
    “我们团队带着钻机去了实地。”
    “打钻十五米深,分层取样。”
    “那边的土质属于典型的沙壤土,硬度、黏性、受压形变率,我们全拿回来了。”
    为了让返回舱在这试验场砸出的数据,和真落在大草原上一致。
    刘教授带队去四子王旗进行取样和检测。
    “为什么不去内蒙就地做冲击试验?”
    旁边一名新来的技术员忍不住问。
    刘教授摇头解答:
    “那可是砸几十次。”
    “荒郊野外,怎么建一百三十米的高塔?”
    “高速摄像机、海量传感器怎么布线?”
    “后勤供电怎么保障?”
    “那去内蒙拉土过来?”
    技术员又问。
    “挖得少,铺不出真实地层。”
    “挖得多,把草原植被翻得一塌糊涂,试验做成了,生态账谁来背?”
    秦老接上话,
    “所以只能人工配土。”
    “把四子王旗的土层数据拆开,一层一层,在这里重新做出来。”
    秦老望向深坑,又抬头看了一眼高塔顶端。
    “这一次砸下来的,不是一块铁。”
    “是三个人未来能不能平安回家的路。”
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