基于等效电路低温推进剂加注系统固有频率分析  

Natural frequency analysis of cryogenic propellant filling system based on equivalent circuit

作　　者：王勇 钱华[1] 梁文清[1] 疏志勇 雷刚 王天祥 车邦祥 刘海洋[4] Wang Yong;Qian Hua;Liang Wenqing;Shu Zhiyong;Lei Gang;Wang Tianxiang;Che Bangxiang;Liu Haiyang(School of Energy and Environment,Southeast University,Nanjing 210000,China;State Key Laboratory of Technologies in Space Cryogenic Propellants,Beijing 100028,China;Institue of Spacecraft System Engineering,Beijing 100094,China;Aerosun Corporation,Nanjing 211100,China)

机构地区：[1]东南大学能源与环境学院,南京210000 [2]航天低温推进剂技术国家重点实验室,北京100028 [3]北京空间飞行器总体设计部,北京100094 [4]航天晨光股份有限公司,南京211100

出　　处：《低温与超导》2024年第2期68-74,102,共8页Cryogenics and Superconductivity

基　　金：国防科工局民用航天项目(D030311);江苏省科技厅科技成果转化项目(BA2023103)资助。

摘　　要：系统的固有频率的研究对流固耦合振动具有重要意义,本文基于等效电路的方法,对低温推进剂加注系统固有频率开展研究,利用MATLAB/SIMULINK仿真软件搭建等效电路进行固有频率求解,最后计算了典型加注系统管路在不同管路参数以及流体物性参数下的系统一阶固有频率,该方法更为直观地获得管路参数和流体物性参数对系统固有频率的影响规律。研究表明,加注系统的固有频率与加注管道长度有关,在管径为0.15 m下当加注管从5 m增加到25 m时其固有频率减小了22.5%,且增加蓄压器后系统的固有频率也会减小。研究结果可为低温推进剂管路设计和减振防护提供技术依据。The study of the natural frequency of the system is of great significance to the fluid-solid coupling vibration.Based on the equivalent circuit method,this paper studied the natural frequency of the cryogenic propellant filling system.The e⁃quivalent circuit was built on the MATLAB/SIMULINK platform to solve the natural frequency.Finally,the first-order natural frequency of the typical filling system pipeline under different pipeline parameters and fluid physical parameters was calculated.This method is more intuitive to obtain the influence of pipeline parameters and fluid physical parameters on the natural frequency of the system.The research shows that the natural frequency of the filling system is related to the length of the filling pipe.When the pipe diameter is 0.15 m,the natural frequency is reduced by 22.5%when the filling pipe is increased from 5 m to 25 m,and the natural frequency of the system is also reduced after the accumulator was added.The research results can provide techni⁃cal basis for cryogenic propellant pipeline design and vibration reduction protection.

关 键 词：低温推进剂 流体管路系统 固有频率 等效电路 

分 类 号：TK91[动力工程及工程热物理]