箭体

火箭箭体的振动模态数据，以前主要是由全箭振动试验取得的，其实也可以由计算获得。

Full-scall launch vehicle vibration test has been used as a main method for obtaining modal parameters of launch vehicle .

大量实测数据计算结果证实，该箭体漂移的运动学模型是可靠的，很好地刻画了火箭在垂直起飞段漂移量的变化规律。

A large amount of practical measurement and calculated drift data of rocket shows that the models are suitable for describing and analyzing drift of rocket in takeoff phase .

火箭的载荷可分为静载荷和动载荷，静载荷是由定常外力引起的箭体内力，动载荷是由随机或剧烈变化的外力激起的箭体振动响应载荷。

The forces of a rocket can divided into static forces and dynamic forces . The former are caused by constant external loads while the latter result from the vibration of the rocket 's body induced by vertiginous loads .

待发段倾倒应急救生的关键在于及时获取准确可靠的箭体姿态与倾倒信息，为指挥员实时提供可靠的逃逸判决依据。

The key to judge whether the launch vehicle was inclining to a dangerous angle or not and to make decision whether the spacemen were necessary to escape from the spacecraft was to obtain accurate and credible information of its attitude in real time .