一、前 一六j 口 结构和材料在肮天器系统工程设计中,是一项不可缺少的关键性的技术项目,结构的合理性与材料的先进性,对整个航天器的先进性起着决定性的作用。对于从地面射人轨道的空间运输系统(例如运载火箭和航天飞机等),在结构和材料方面,必须体现刚性大、强度高、重量轻和 I. The structure and materials of the first sixteen j-mouths are an indispensable key technical project in the system design of the tight skycraft. The rationality of the structure and the advanced nature of the materials play an important role in the advancement of the entire spacecraft Decisive role. Space transport systems (such as launch vehicles and space shuttles) that shoot orbit from the ground must be rigid, strong, and lightweight in terms of structure and materials