摘要
在大推力捆绑式火箭中,芯级贮箱因其特殊的连接形式承受千吨级的集中载荷,集中力的扩散效果直接影响到贮箱的强度失效模式和可靠性,传统贮箱短壳的放射肋扩散效率低、路径短,千吨级集中力无法得到有效地扩散,且传统设计为避免失效往往采取过于保守的设计方法,导致主体结构不必要的增重。本文围绕千吨级集中力的扩散问题对薄壁贮箱开展一体化设计,通过工程算法、拓扑优化及有限元分析,获得特殊的扩散结构,并由集中载荷联合静力试验验证了扩散结构设计的合理性,实测箱体扩散效率大于84%,满足设计指标。
In the strap-on large thrust launch vehicle, central tanks were bearing kiloton concentrated forces due to their special form of connection. The transmission effect of concentrated force directly impacted failure mode and reliability of the tank. Because traditional radial ribs of short shell structure had low diffusion efficiency and short path of force transfer, could not be diffused effectively, meanwhile, traditional design usually adopted conservative method to avoid structure failure; this would lead to unnecessary weight growth. Our present work focus on integration design method of kiloton concentrated forces diffusion on thin-wall tank, the special diffuse structures were obtained by calculation method, optimum topology and FEM, also justified to be feasible by synthetic static test. The transmission efficiency of the tank was over 84% during the test, which satisfied the design index.
出处
《强度与环境》
2016年第5期38-44,共7页
Structure & Environment Engineering
关键词
薄壁贮箱
集中力
拓扑优化
扩散效率
thin-wall tank
concentrated force
optimum topology design
transmission efficiency
