火箭推进2018，Vol.44Issue(6)：39-43,80,6.
重复使用液体火箭发动机结构可靠性分配
Allocation of structural reliability index for reusable liquid rocket engine
摘要
Abstract
Aiming at the repeated characteristics and minimizing the reliability deviation of each subsystem during the whole service life, an allocation method of structural reliability index is proposed for the reusable liquid rocket engine. Based on the equal reliability allocation, this method takes the reliability deviation of whole service life as the objective function and uses the genetic algorithm to optimize the allocation results. It can avoid the "weak point " of each subsystem in operation while satisfying the reliability at the end of engine life. The specific allocation method is introduced with an example of reusable hydrogen-oxygen rocket engine. Compared with the equal allocation method, the reliability deviation of each subsystem in the whole engine service life is decreased by 35％, which validating the feasibility and effectiveness of proposed method.关键词
重复使用液体火箭发动机/重复使用全过程/结构可靠性分配Key words
reusable liquid rocket engine/whole service life/allocation of structural reliability index分类
航空航天引用本文复制引用
杨进慧,戚亚群,金平,蔡国飙..重复使用液体火箭发动机结构可靠性分配[J].火箭推进,2018,44(6):39-43,80,6.基金项目
国防科技创新特区(H863)支持项目(×××可靠性评估方法和可靠性优化设计研究) （H863）
