不同分布载荷下药柱内孔受力特性分析  

Analysis on mechanical properties of internal burning grains under different distribution loading

作　　者：杨乐[1] 余贞勇[1] 何景轩[1] 

机构地区：[1]中国航天科技集团公司第四院第四十一所燃烧流动和热结构国家级重点实验室,西安710025

出　　处：《强度与环境》2018年第1期45-49,共5页Structure & Environment Engineering

摘　　要：大长径比固体火箭发动机点火瞬态过程中药柱内孔受力较为复杂,对其载荷的处理方式直接影响最终的计算结果。本文建立了某战术发动机的流场模型及药柱有限元模型,对比分析了药柱内孔在均布和非均布载荷下的受力特性分析。计算结果表明,相比与均布载荷,非均匀分布载荷条件下药柱内孔应力—应变值较高,同时使得药柱结构可靠性有所提高。The mechanical properties with internal burning grains of large aspect ration solid rocket motor in ignition process is sophisticated.The result will be largely effected by loading method.A fluid model and FEM model of the tactical SRM were set up,the mechanical properties were analyzed with uniform and non-uniform distribution loading of the internal burning grains.The result shows that grain＇s stress and strain under non-uniform distribution loading are higher than uniform distribution loading.Meanwhile,the structure reliability of the grains is improved.

关 键 词：非均匀分布 药柱内孔 结构可靠性 

分 类 号：V435[航空宇航科学与技术—航空宇航推进理论与工程]