火箭推进2025，Vol.51Issue(2)：94-103,10.DOI:10.3969/j.issn.1672-9374.2025.02.010
航天器金属隔膜贮箱振动响应仿真分析
Simulation analysis of vibration response for metal diaphragm tank in spacecraft
摘要
Abstract
In order to study the coupled dynamic response of metal diaphragm tank under vibration in aerospace propulsion system,sloshing experiments of rectangular tank were carried out,and the sloshing shape of liquid and the pressure response of tank side wall under horizontal harmonic excitation were obtained.Secondly,a smoothed particle hydrodynamics(SPH)method applicable for fluid dynamic analysis was combined with finite element method(FEM)applicable for structural strength analysis to establish an SPH-FEM coupling calculation model,which was validated by comparing with experimental results.Finally,the above simulation model was applied to conduct a strong-coupled fluid-structure simulation analysis of the metal diaphragm tank dynamic response of engine with the load equivalent technology,and the pressure response of the extremely thin pre-notched diaphragm was predicted.The results show that compared with the random vibration load,the liquid sloshing in diaphragm tank is more severe under horizontal harmonic excitation,but the peak pressure of scribing diaphragm is smaller.By using the pressure response obtained under the coupling of fluid-structure interaction as an equivalent load input,the overall stress response of diaphragm with the micro-notched groove can be obtained more efficiently and accurately,providing support for the fatigue life analysis of the tank structure.关键词
金属隔膜贮箱/SPH-FEM强耦合/振动激励/刻痕膜片Key words
metal diaphragm tank/SPH-FEM strong coupling/vibration excitation/pre-notched dia-phragm分类
航空航天引用本文复制引用
刘祥东,姜薇,丁家浩,杨扬,胡海峰..航天器金属隔膜贮箱振动响应仿真分析[J].火箭推进,2025,51(2):94-103,10.基金项目
国家自然科学基金面上项目(12272309) （12272309）
液体火箭发动机技术重点实验室基金课题(6142704210304) （6142704210304）
