上面级液体悬挂贮箱动力学建模方法研究  

Research on dynamical FE modeling method of upper stage liquid suspension tank

作　　者：林宏 彭慧莲 顾伟军 刘畅 王明哲 潘忠文 LIN Hong;PENG Huilian;GU Weijun;LIU Chang;WANG Mingzhe;PAN Zhongwen(Beijing Institute of Astronautical Systems Engineering, Beijing, 100076, China)

机构地区：[1]北京宇航系统工程研究所,北京100076

出　　处：《强度与环境》2018年第2期9-14,共6页Structure & Environment Engineering

基　　金：国家高技术研究发展计划资助项目2015AA7021076

摘　　要：提出一种适用于上面级液体悬挂贮箱的建模原则、建模方法,并针对不同建模方法给出静力和模态计算值对比。由分析可知"贮箱柱段壳+贮箱球底梁+液体质量点"的组合建模方法,可较好模拟贮箱柱段/贮箱法兰/主结构支架间的连接刚度。具有频率计算值与试验值较为接近、计算耗时较小等优点,有利于提高贮箱局部纵向模态建模精度。The dynamical finite element modeling principle and method is presented, which is suitable for upper stage liquid suspension tank. And the comparison of theoretical calculation values is given for different modeling method. The shell-beam-lumped combined modeling method has the benefits of less time consuming, reasonable connection stiffness simulation and good consistence with test values. It is useful to improve the modeling precision associated tank longitudinal modal of upper stage and spacecraft.

关 键 词：充液悬挂贮箱 动力学有限元模型 纵向模态 POGO稳定分析 

分 类 号：V414.33[航空宇航科学与技术—航空宇航推进理论与工程]