火箭推进2024，Vol.50Issue(3)：19-27,9.DOI:10.3969/j.issn.1672-9374.2024.03.003
冲击载荷下姿轨控贮箱流固耦合响应分析
Fluid-solid coupling response analysis of propellant tank in attitude-orbit control system under impact load
摘要
Abstract
A propellant tank will generate strong fluid-solid coupled vibration under the high-magnitude impact load,which may cause structural damage in severe cases.In order to precisely predict the impact response of liquid-filled tanks and reveal the mechanism of fluid-solid coupled vibration inside it,a coupled dynamics model of the liquid-filled tank was established by adopting smooth particle hydrodynamics(SPH)in combination with the structural finite element method.Acceleration results of the tank with different loading magnitudes and filling ratios were calculated and compared with those obtained from experiments.The results show that the acceleration response of the tank fluctuates sharply under a high magnitude load with a high filling ratio.For the calculated tank,the fluctuation occurs when the magnitude reaches-3 dB at a full filling ratio,with a peak value of 5.33g.The fluctuation also occurs when the filling ratio reaches 75% at 0 dB,with a peak value of 7.88g,while the most obvious fluctuation appers at 0 dB with a full filling ratio,with the peak value of 24.24g,which is only 2.7% off from the experimental results.By analyzing the motion pattern of fluid and structure during the impact period,it can be seen that the fluctuation of acceleration response after the impact is triggered by the violent collision of fluid and shell after the separation between them.关键词
推进剂贮箱/SPH方法/半正弦冲击/流固耦合/动力学分析Key words
propellant tank/SPH method/half-sine impact/fluid-solid interaction/dynamic analysis分类
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张轩,王旭阳,徐自力,薛杰,王珺..冲击载荷下姿轨控贮箱流固耦合响应分析[J].火箭推进,2024,50(3):19-27,9.基金项目
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